Abstract common DB methods in mysql.db.DB class and use it as base to implement PgDB, OracleDB and MyDB
This commit is contained in:
parent
83ce6b9d1b
commit
da63f533be
392
mylib/db.py
Normal file
392
mylib/db.py
Normal file
|
|
@ -0,0 +1,392 @@
|
|||
# -*- coding: utf-8 -*-
|
||||
|
||||
""" Basic SQL DB client """
|
||||
|
||||
import logging
|
||||
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
#
|
||||
# Exceptions
|
||||
#
|
||||
|
||||
class DBException(Exception):
|
||||
""" That is the base exception class for all the other exceptions provided by this module. """
|
||||
|
||||
def __init__(self, error, *args, **kwargs):
|
||||
for arg, value in kwargs.items():
|
||||
setattr(self, arg, value)
|
||||
super().__init__(error.format(*args, **kwargs))
|
||||
|
||||
|
||||
class DBNotImplemented(DBException, RuntimeError):
|
||||
"""
|
||||
Raised when calling a method not implemented in child class
|
||||
"""
|
||||
|
||||
def __init__(self, method, class_name):
|
||||
super().__init__(
|
||||
"The method {method} is not yet implemented in class {class_name}",
|
||||
method=method, class_name=class_name
|
||||
)
|
||||
|
||||
|
||||
class DBFailToConnect(DBException, RuntimeError):
|
||||
"""
|
||||
Raised on connecting error occurred
|
||||
"""
|
||||
|
||||
def __init__(self, uri):
|
||||
super().__init__(
|
||||
"An error occured during database connection ({uri})",
|
||||
uri=uri
|
||||
)
|
||||
|
||||
|
||||
class DBDuplicatedSQLParameter(DBException, KeyError):
|
||||
"""
|
||||
Raised when trying to set a SQL query parameter
|
||||
and an other parameter with the same name is already set
|
||||
"""
|
||||
|
||||
def __init__(self, parameter_name):
|
||||
super().__init__(
|
||||
"Duplicated SQL parameter '{parameter_name}'",
|
||||
parameter_name=parameter_name
|
||||
)
|
||||
|
||||
|
||||
class DBUnsupportedWHEREClauses(DBException, TypeError):
|
||||
"""
|
||||
Raised when trying to execute query with unsupported
|
||||
WHERE clauses provided
|
||||
"""
|
||||
|
||||
def __init__(self, where_clauses):
|
||||
super().__init__(
|
||||
"Unsupported WHERE clauses: {where_clauses}",
|
||||
where_clauses=where_clauses
|
||||
)
|
||||
|
||||
|
||||
class DBInvalidOrderByClause(DBException, TypeError):
|
||||
"""
|
||||
Raised when trying to select on table with invalid
|
||||
ORDER BY clause provided
|
||||
"""
|
||||
|
||||
def __init__(self, order_by):
|
||||
super().__init__(
|
||||
"Invalid ORDER BY clause: {order_by}. Must be a string or a list of two values (ordering field name and direction)",
|
||||
order_by=order_by
|
||||
)
|
||||
|
||||
|
||||
class DB:
|
||||
""" Database client """
|
||||
|
||||
just_try = False
|
||||
|
||||
def __init__(self, just_try=False, **kwargs):
|
||||
self.just_try = just_try
|
||||
self._conn = None
|
||||
for arg, value in kwargs.items():
|
||||
setattr(self, f'_{arg}', value)
|
||||
|
||||
def connect(self, exit_on_error=True):
|
||||
""" Connect to DB server """
|
||||
raise DBNotImplemented('connect', self.__class__.__name__)
|
||||
|
||||
def close(self):
|
||||
""" Close connection with DB server (if opened) """
|
||||
if self._conn:
|
||||
self._conn.close()
|
||||
self._conn = None
|
||||
|
||||
@staticmethod
|
||||
def _log_query(sql, params):
|
||||
log.debug(
|
||||
'Run SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
@staticmethod
|
||||
def _log_query_exception(sql, params):
|
||||
log.exception(
|
||||
'Error during SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
def doSQL(self, sql, params=None):
|
||||
"""
|
||||
Run SQL query and commit changes (rollback on error)
|
||||
|
||||
:param sql: The SQL query
|
||||
:param params: The SQL query's parameters as dict (optional)
|
||||
|
||||
:return: True on success, False otherwise
|
||||
:rtype: bool
|
||||
"""
|
||||
raise DBNotImplemented('doSQL', self.__class__.__name__)
|
||||
|
||||
def doSelect(self, sql, params=None):
|
||||
"""
|
||||
Run SELECT SQL query and return list of selected rows as dict
|
||||
|
||||
:param sql: The SQL query
|
||||
:param params: The SQL query's parameters as dict (optional)
|
||||
|
||||
:return: List of selected rows as dict on success, False otherwise
|
||||
:rtype: list, bool
|
||||
"""
|
||||
raise DBNotImplemented('doSelect', self.__class__.__name__)
|
||||
|
||||
#
|
||||
# SQL helpers
|
||||
#
|
||||
|
||||
@staticmethod
|
||||
def _quote_table_name(table):
|
||||
""" Quote table name """
|
||||
return '"{0}"'.format( # pylint: disable=consider-using-f-string
|
||||
'"."'.join(
|
||||
table.split('.')
|
||||
)
|
||||
)
|
||||
|
||||
@staticmethod
|
||||
def _quote_field_name(field):
|
||||
""" Quote table name """
|
||||
return f'"{field}"'
|
||||
|
||||
@staticmethod
|
||||
def format_param(param):
|
||||
""" Format SQL query parameter for prepared query """
|
||||
return f'%({param})s'
|
||||
|
||||
@classmethod
|
||||
def _combine_params(cls, params, to_add=None, **kwargs):
|
||||
if to_add:
|
||||
assert isinstance(to_add, dict), "to_add must be a dict or None"
|
||||
params = cls._combine_params(params, **to_add)
|
||||
|
||||
for param, value in kwargs.items():
|
||||
if param in params:
|
||||
raise DBDuplicatedSQLParameter(param)
|
||||
params[param] = value
|
||||
return params
|
||||
|
||||
@classmethod
|
||||
def _format_where_clauses(cls, where_clauses, params=None, where_op=None):
|
||||
"""
|
||||
Format WHERE clauses
|
||||
|
||||
:param where_clauses: The WHERE clauses. Could be:
|
||||
- a raw SQL WHERE clause as string
|
||||
- a tuple of two elements: a raw WHERE clause and its parameters as dict
|
||||
- a dict of WHERE clauses with field name as key and WHERE clause value as value
|
||||
- a list of any of previous valid WHERE clauses
|
||||
:param params: Dict of other already set SQL query parameters (optional)
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: AND)
|
||||
|
||||
:return: A tuple of two elements: raw SQL WHERE combined clauses and parameters on success
|
||||
:rtype: string, bool
|
||||
"""
|
||||
if params is None:
|
||||
params = {}
|
||||
if where_op is None:
|
||||
where_op = 'AND'
|
||||
|
||||
if isinstance(where_clauses, str):
|
||||
return (where_clauses, params)
|
||||
|
||||
if isinstance(where_clauses, tuple) and len(where_clauses) == 2 and isinstance(where_clauses[1], dict):
|
||||
cls._combine_params(params, where_clauses[1])
|
||||
return (where_clauses[0], params)
|
||||
|
||||
if isinstance(where_clauses, (list, tuple)):
|
||||
sql_where_clauses = []
|
||||
for where_clause in where_clauses:
|
||||
sql2, params = cls._format_where_clauses(where_clause, params=params, where_op=where_op)
|
||||
sql_where_clauses.append(sql2)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
|
||||
if isinstance(where_clauses, dict):
|
||||
sql_where_clauses = []
|
||||
for field, value in where_clauses.items():
|
||||
param = field
|
||||
if field in params:
|
||||
idx = 1
|
||||
while param in params:
|
||||
param = f'{field}_{idx}'
|
||||
idx += 1
|
||||
cls._combine_params(params, {param: value})
|
||||
sql_where_clauses.append(
|
||||
f'{cls._quote_field_name(field)} = {cls.format_param(param)}'
|
||||
)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
raise DBUnsupportedWHEREClauses(where_clauses)
|
||||
|
||||
@classmethod
|
||||
def _add_where_clauses(cls, sql, params, where_clauses, where_op=None):
|
||||
"""
|
||||
Add WHERE clauses to an SQL query
|
||||
|
||||
:param sql: The SQL query to complete
|
||||
:param params: The dict of parameters of the SQL query to complete
|
||||
:param where_clauses: The WHERE clause (see _format_where_clauses())
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: see _format_where_clauses())
|
||||
|
||||
:return:
|
||||
:rtype: A tuple of two elements: raw SQL WHERE combined clauses and parameters
|
||||
"""
|
||||
if where_clauses:
|
||||
sql_where, params = cls._format_where_clauses(where_clauses, params=params, where_op=where_op)
|
||||
sql += " WHERE " + sql_where
|
||||
return (sql, params)
|
||||
|
||||
def insert(self, table, values, just_try=False):
|
||||
""" Run INSERT SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'INSERT INTO {0} ({1}) VALUES ({2})'.format(
|
||||
self._quote_table_name(table),
|
||||
', '.join([
|
||||
self._quote_field_name(field)
|
||||
for field in values.keys()
|
||||
]),
|
||||
", ".join([
|
||||
self.format_param(key)
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute INSERT query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=values):
|
||||
log.error("Fail to execute INSERT query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def update(self, table, values, where_clauses, where_op=None, just_try=False):
|
||||
""" Run UPDATE SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'UPDATE {0} SET {1}'.format(
|
||||
self._quote_table_name(table),
|
||||
", ".join([
|
||||
f'{self._quote_field_name(key)} = {self.format_param(key)}'
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
params = values
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (DBDuplicatedSQLParameter, DBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def delete(self, table, where_clauses, where_op='AND', just_try=False):
|
||||
""" Run DELETE SQL query """
|
||||
sql = f'DELETE FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (DBDuplicatedSQLParameter, DBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def truncate(self, table, just_try=False):
|
||||
""" Run TRUNCATE SQL query """
|
||||
sql = f'TRUNCATE TABLE {self._quote_table_name(table)}'
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute TRUNCATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql):
|
||||
log.error("Fail to execute TRUNCATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def select(self, table, where_clauses=None, fields=None, where_op='AND', order_by=None, just_try=False):
|
||||
""" Run SELECT SQL query """
|
||||
sql = "SELECT "
|
||||
if fields is None:
|
||||
sql += "*"
|
||||
elif isinstance(fields, str):
|
||||
sql += f'{self._quote_field_name(fields)}'
|
||||
else:
|
||||
sql += ', '.join([self._quote_field_name(field) for field in fields])
|
||||
|
||||
sql += f' FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (DBDuplicatedSQLParameter, DBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if order_by:
|
||||
if isinstance(order_by, str):
|
||||
sql += f' ORDER BY {order_by}'
|
||||
elif (
|
||||
isinstance(order_by, (list, tuple)) and len(order_by) == 2
|
||||
and isinstance(order_by[0], str)
|
||||
and isinstance(order_by[1], str)
|
||||
and order_by[1].upper() in ('ASC', 'UPPER')
|
||||
):
|
||||
sql += f' ORDER BY "{order_by[0]}" {order_by[1].upper()}'
|
||||
else:
|
||||
raise DBInvalidOrderByClause(order_by)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute SELECT query : %s", sql)
|
||||
return just_try
|
||||
|
||||
return self.doSelect(sql, params=params)
|
||||
117
mylib/mysql.py
117
mylib/mysql.py
|
|
@ -8,53 +8,106 @@ import sys
|
|||
import MySQLdb
|
||||
from MySQLdb._exceptions import Error
|
||||
|
||||
from mylib.db import DB
|
||||
from mylib.db import DBFailToConnect
|
||||
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
class MyDB:
|
||||
class MyDB(DB):
|
||||
""" MySQL client """
|
||||
|
||||
host = ""
|
||||
user = ""
|
||||
pwd = ""
|
||||
db = ""
|
||||
_host = None
|
||||
_user = None
|
||||
_pwd = None
|
||||
_db = None
|
||||
|
||||
con = 0
|
||||
def __init__(self, host, user, pwd, db, charset=None, **kwargs):
|
||||
self._host = host
|
||||
self._user = user
|
||||
self._pwd = pwd
|
||||
self._db = db
|
||||
self._charset = charset if charset else 'utf8'
|
||||
super().__init__(**kwargs)
|
||||
|
||||
def __init__(self, host, user, pwd, db):
|
||||
self.host = host
|
||||
self.user = user
|
||||
self.pwd = pwd
|
||||
self.db = db
|
||||
|
||||
def connect(self):
|
||||
def connect(self, exit_on_error=True):
|
||||
""" Connect to MySQL server """
|
||||
if self.con == 0:
|
||||
if self._conn is None:
|
||||
try:
|
||||
con = MySQLdb.connect(self.host, self.user, self.pwd, self.db)
|
||||
self.con = con
|
||||
except Error:
|
||||
log.fatal('Error connecting to MySQL server', exc_info=True)
|
||||
sys.exit(1)
|
||||
self._conn = MySQLdb.connect(
|
||||
host=self._host, user=self._user, passwd=self._pwd,
|
||||
db=self._db, charset=self._charset, use_unicode=True)
|
||||
except Error as err:
|
||||
log.fatal(
|
||||
'An error occured during MySQL database connection (%s@%s:%s).',
|
||||
self._user, self._host, self._db, exc_info=1
|
||||
)
|
||||
if exit_on_error:
|
||||
sys.exit(1)
|
||||
else:
|
||||
raise DBFailToConnect(f'{self._user}@{self._host}:{self._db}') from err
|
||||
return True
|
||||
|
||||
def doSQL(self, sql):
|
||||
""" Run INSERT/UPDATE/DELETE/... SQL query """
|
||||
cursor = self.con.cursor()
|
||||
def doSQL(self, sql, params=None):
|
||||
"""
|
||||
Run SQL query and commit changes (rollback on error)
|
||||
|
||||
:param sql: The SQL query
|
||||
:param params: The SQL query's parameters as dict (optional)
|
||||
|
||||
:return: True on success, False otherwise
|
||||
:rtype: bool
|
||||
"""
|
||||
if self.just_try:
|
||||
log.debug("Just-try mode : do not really execute SQL query '%s'", sql)
|
||||
return True
|
||||
cursor = self._conn.cursor()
|
||||
try:
|
||||
cursor.execute(sql)
|
||||
self.con.commit()
|
||||
self._log_query(sql, params)
|
||||
cursor.execute(sql, params)
|
||||
self._conn.commit()
|
||||
return True
|
||||
except Error:
|
||||
log.error('Error during SQL request "%s"', sql, exc_info=True)
|
||||
self.con.rollback()
|
||||
self._log_query_exception(sql, params)
|
||||
self._conn.rollback()
|
||||
return False
|
||||
|
||||
def doSelect(self, sql):
|
||||
""" Run SELECT SQL query and return result as dict """
|
||||
cursor = self.con.cursor()
|
||||
def doSelect(self, sql, params=None):
|
||||
"""
|
||||
Run SELECT SQL query and return list of selected rows as dict
|
||||
|
||||
:param sql: The SQL query
|
||||
:param params: The SQL query's parameters as dict (optional)
|
||||
|
||||
:return: List of selected rows as dict on success, False otherwise
|
||||
:rtype: list, bool
|
||||
"""
|
||||
try:
|
||||
cursor.execute(sql)
|
||||
return cursor.fetchall()
|
||||
self._log_query(sql, params)
|
||||
cursor = self._conn.cursor()
|
||||
cursor.execute(sql, params)
|
||||
return [
|
||||
dict(
|
||||
(field[0], row[idx])
|
||||
for idx, field in enumerate(cursor.description)
|
||||
)
|
||||
for row in cursor.fetchall()
|
||||
]
|
||||
except Error:
|
||||
log.error('Error during SQL request "%s"', sql, exc_info=True)
|
||||
self._log_query_exception(sql, params)
|
||||
return False
|
||||
|
||||
@staticmethod
|
||||
def _quote_table_name(table):
|
||||
""" Quote table name """
|
||||
return '`{0}`'.format( # pylint: disable=consider-using-f-string
|
||||
'`.`'.join(
|
||||
table.split('.')
|
||||
)
|
||||
)
|
||||
|
||||
@staticmethod
|
||||
def _quote_field_name(field):
|
||||
""" Quote table name """
|
||||
return f'`{field}`'
|
||||
|
|
|
|||
331
mylib/oracle.py
331
mylib/oracle.py
|
|
@ -7,82 +7,24 @@ import sys
|
|||
|
||||
import cx_Oracle
|
||||
|
||||
from mylib.db import DB
|
||||
from mylib.db import DBFailToConnect
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
#
|
||||
# Exceptions
|
||||
#
|
||||
|
||||
class OracleDBException(Exception):
|
||||
""" That is the base exception class for all the other exceptions provided by this module. """
|
||||
|
||||
def __init__(self, error, *args, **kwargs):
|
||||
for arg, value in kwargs.items():
|
||||
setattr(self, arg, value)
|
||||
super().__init__(error.format(*args, **kwargs))
|
||||
|
||||
|
||||
class OracleDBFailToConnect(OracleDBException, RuntimeError):
|
||||
"""
|
||||
Raised on connecting error occurred
|
||||
"""
|
||||
|
||||
def __init__(self, dsn, user):
|
||||
super().__init__(
|
||||
"An error occured during Oracle database connection ({user}@{dsn})",
|
||||
user=user, dsn=dsn
|
||||
)
|
||||
|
||||
|
||||
class OracleDBDuplicatedSQLParameter(OracleDBException, KeyError):
|
||||
"""
|
||||
Raised when trying to set a SQL query parameter
|
||||
and an other parameter with the same name is already set
|
||||
"""
|
||||
|
||||
def __init__(self, parameter_name):
|
||||
super().__init__(
|
||||
"Duplicated SQL parameter '{parameter_name}'",
|
||||
parameter_name=parameter_name
|
||||
)
|
||||
|
||||
|
||||
class OracleDBUnsupportedWHEREClauses(OracleDBException, TypeError):
|
||||
"""
|
||||
Raised when trying to execute query with unsupported
|
||||
WHERE clauses provided
|
||||
"""
|
||||
|
||||
def __init__(self, where_clauses):
|
||||
super().__init__(
|
||||
"Unsupported WHERE clauses: {where_clauses}",
|
||||
where_clauses=where_clauses
|
||||
)
|
||||
|
||||
|
||||
class OracleDBInvalidOrderByClause(OracleDBException, TypeError):
|
||||
"""
|
||||
Raised when trying to select on table with invalid
|
||||
ORDER BY clause provided
|
||||
"""
|
||||
|
||||
def __init__(self, order_by):
|
||||
super().__init__(
|
||||
"Invalid ORDER BY clause: {order_by}. Must be a string or a list of two values (ordering field name and direction)",
|
||||
order_by=order_by
|
||||
)
|
||||
|
||||
|
||||
class OracleDB:
|
||||
class OracleDB(DB):
|
||||
""" Oracle client """
|
||||
|
||||
def __init__(self, dsn, user, pwd, just_try=False):
|
||||
_dsn = None
|
||||
_user = None
|
||||
_pwd = None
|
||||
|
||||
def __init__(self, dsn, user, pwd, **kwargs):
|
||||
self._dsn = dsn
|
||||
self._user = user
|
||||
self._pwd = pwd
|
||||
self._conn = None
|
||||
self.just_try = just_try
|
||||
super().__init__(**kwargs)
|
||||
|
||||
def connect(self, exit_on_error=True):
|
||||
""" Connect to Oracle server """
|
||||
|
|
@ -102,41 +44,9 @@ class OracleDB:
|
|||
if exit_on_error:
|
||||
sys.exit(1)
|
||||
else:
|
||||
raise OracleDBFailToConnect(self._dsn, self._user) from err
|
||||
raise DBFailToConnect(f'{self._user}@{self._dsn}') from err
|
||||
return True
|
||||
|
||||
def close(self):
|
||||
""" Close connection with Oracle server (if opened) """
|
||||
if self._conn:
|
||||
self._conn.close()
|
||||
self._conn = None
|
||||
|
||||
@staticmethod
|
||||
def _log_query(sql, params):
|
||||
log.debug(
|
||||
'Run SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
@staticmethod
|
||||
def _log_query_exception(sql, params):
|
||||
log.exception(
|
||||
'Error during SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
def doSQL(self, sql, params=None):
|
||||
"""
|
||||
Run SQL query and commit changes (rollback on error)
|
||||
|
|
@ -199,222 +109,3 @@ class OracleDB:
|
|||
def format_param(param):
|
||||
""" Format SQL query parameter for prepared query """
|
||||
return f':{param}'
|
||||
|
||||
@classmethod
|
||||
def _combine_params(cls, params, to_add=None, **kwargs):
|
||||
if to_add:
|
||||
assert isinstance(to_add, dict), "to_add must be a dict or None"
|
||||
params = cls._combine_params(params, **to_add)
|
||||
|
||||
for param, value in kwargs.items():
|
||||
if param in params:
|
||||
raise OracleDBDuplicatedSQLParameter(param)
|
||||
params[param] = value
|
||||
return params
|
||||
|
||||
@classmethod
|
||||
def _format_where_clauses(cls, where_clauses, params=None, where_op=None):
|
||||
"""
|
||||
Format WHERE clauses
|
||||
|
||||
:param where_clauses: The WHERE clauses. Could be:
|
||||
- a raw SQL WHERE clause as string
|
||||
- a tuple of two elements: a raw WHERE clause and its parameters as dict
|
||||
- a dict of WHERE clauses with field name as key and WHERE clause value as value
|
||||
- a list of any of previous valid WHERE clauses
|
||||
:param params: Dict of other already set SQL query parameters (optional)
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: AND)
|
||||
|
||||
:return: A tuple of two elements: raw SQL WHERE combined clauses and parameters on success
|
||||
:rtype: string, bool
|
||||
"""
|
||||
if params is None:
|
||||
params = {}
|
||||
if where_op is None:
|
||||
where_op = 'AND'
|
||||
|
||||
if isinstance(where_clauses, str):
|
||||
return (where_clauses, params)
|
||||
|
||||
if isinstance(where_clauses, tuple) and len(where_clauses) == 2 and isinstance(where_clauses[1], dict):
|
||||
cls._combine_params(params, where_clauses[1])
|
||||
return (where_clauses[0], params)
|
||||
|
||||
if isinstance(where_clauses, (list, tuple)):
|
||||
sql_where_clauses = []
|
||||
for where_clause in where_clauses:
|
||||
sql2, params = cls._format_where_clauses(where_clause, params=params, where_op=where_op)
|
||||
sql_where_clauses.append(sql2)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
|
||||
if isinstance(where_clauses, dict):
|
||||
sql_where_clauses = []
|
||||
for field, value in where_clauses.items():
|
||||
param = field
|
||||
if field in params:
|
||||
idx = 1
|
||||
while param in params:
|
||||
param = f'{field}_{idx}'
|
||||
idx += 1
|
||||
cls._combine_params(params, {param: value})
|
||||
sql_where_clauses.append(
|
||||
f'"{field}" = {cls.format_param(param)}'
|
||||
)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
raise OracleDBUnsupportedWHEREClauses(where_clauses)
|
||||
|
||||
@classmethod
|
||||
def _add_where_clauses(cls, sql, params, where_clauses, where_op=None):
|
||||
"""
|
||||
Add WHERE clauses to an SQL query
|
||||
|
||||
:param sql: The SQL query to complete
|
||||
:param params: The dict of parameters of the SQL query to complete
|
||||
:param where_clauses: The WHERE clause (see _format_where_clauses())
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: see _format_where_clauses())
|
||||
|
||||
:return:
|
||||
:rtype: A tuple of two elements: raw SQL WHERE combined clauses and parameters
|
||||
"""
|
||||
if where_clauses:
|
||||
sql_where, params = cls._format_where_clauses(where_clauses, params=params, where_op=where_op)
|
||||
sql += " WHERE " + sql_where
|
||||
return (sql, params)
|
||||
|
||||
@staticmethod
|
||||
def _quote_table_name(table):
|
||||
""" Quote table name """
|
||||
return '"{0}"'.format( # pylint: disable=consider-using-f-string
|
||||
'"."'.join(
|
||||
table.split('.')
|
||||
)
|
||||
)
|
||||
|
||||
def insert(self, table, values, just_try=False):
|
||||
""" Run INSERT SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'INSERT INTO {0} ("{1}") VALUES ({2})'.format(
|
||||
self._quote_table_name(table),
|
||||
'", "'.join(values.keys()),
|
||||
", ".join([
|
||||
self.format_param(key)
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute INSERT query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=values):
|
||||
log.error("Fail to execute INSERT query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def update(self, table, values, where_clauses, where_op=None, just_try=False):
|
||||
""" Run UPDATE SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'UPDATE {0} SET {1}'.format(
|
||||
self._quote_table_name(table),
|
||||
", ".join([
|
||||
f'"{key}" = {self.format_param(key)}'
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
params = values
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (OracleDBDuplicatedSQLParameter, OracleDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def delete(self, table, where_clauses, where_op='AND', just_try=False):
|
||||
""" Run DELETE SQL query """
|
||||
sql = f'DELETE FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (OracleDBDuplicatedSQLParameter, OracleDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def truncate(self, table, just_try=False):
|
||||
""" Run TRUNCATE SQL query """
|
||||
sql = f'TRUNCATE TABLE {self._quote_table_name(table)}'
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute TRUNCATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql):
|
||||
log.error("Fail to execute TRUNCATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def select(self, table, where_clauses=None, fields=None, where_op='AND', order_by=None, just_try=False):
|
||||
""" Run SELECT SQL query """
|
||||
sql = "SELECT "
|
||||
if fields is None:
|
||||
sql += "*"
|
||||
elif isinstance(fields, str):
|
||||
sql += f'"{fields}"'
|
||||
else:
|
||||
sql += '"{0}"'.format('", "'.join(fields)) # pylint: disable=consider-using-f-string
|
||||
|
||||
sql += f' FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (OracleDBDuplicatedSQLParameter, OracleDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if order_by:
|
||||
if isinstance(order_by, str):
|
||||
sql += f' ORDER BY {order_by}'
|
||||
elif (
|
||||
isinstance(order_by, (list, tuple)) and len(order_by) == 2
|
||||
and isinstance(order_by[0], str)
|
||||
and isinstance(order_by[1], str)
|
||||
and order_by[1].upper() in ('ASC', 'UPPER')
|
||||
):
|
||||
sql += f' ORDER BY "{order_by[0]}" {order_by[1].upper()}'
|
||||
else:
|
||||
raise OracleDBInvalidOrderByClause(order_by)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute SELECT query : %s", sql)
|
||||
return just_try
|
||||
|
||||
return self.doSelect(sql, params=params)
|
||||
|
|
|
|||
334
mylib/pgsql.py
334
mylib/pgsql.py
|
|
@ -8,86 +8,28 @@ import sys
|
|||
|
||||
import psycopg2
|
||||
|
||||
from mylib.db import DB, DBFailToConnect
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
#
|
||||
# Exceptions
|
||||
#
|
||||
|
||||
class PgDBException(Exception):
|
||||
""" That is the base exception class for all the other exceptions provided by this module. """
|
||||
|
||||
def __init__(self, error, *args, **kwargs):
|
||||
for arg, value in kwargs.items():
|
||||
setattr(self, arg, value)
|
||||
super().__init__(error.format(*args, **kwargs))
|
||||
|
||||
|
||||
class PgDBFailToConnect(PgDBException, RuntimeError):
|
||||
"""
|
||||
Raised on connecting error occurred
|
||||
"""
|
||||
|
||||
def __init__(self, host, user, db):
|
||||
super().__init__(
|
||||
"An error occured during Postgresql database connection ({user}@{host}, database={db})",
|
||||
user=user, host=host, db=db
|
||||
)
|
||||
|
||||
|
||||
class PgDBDuplicatedSQLParameter(PgDBException, KeyError):
|
||||
"""
|
||||
Raised when trying to set a SQL query parameter
|
||||
and an other parameter with the same name is already set
|
||||
"""
|
||||
|
||||
def __init__(self, parameter_name):
|
||||
super().__init__(
|
||||
"Duplicated SQL parameter '{parameter_name}'",
|
||||
parameter_name=parameter_name
|
||||
)
|
||||
|
||||
|
||||
class PgDBUnsupportedWHEREClauses(PgDBException, TypeError):
|
||||
"""
|
||||
Raised when trying to execute query with unsupported
|
||||
WHERE clauses provided
|
||||
"""
|
||||
|
||||
def __init__(self, where_clauses):
|
||||
super().__init__(
|
||||
"Unsupported WHERE clauses: {where_clauses}",
|
||||
where_clauses=where_clauses
|
||||
)
|
||||
|
||||
|
||||
class PgDBInvalidOrderByClause(PgDBException, TypeError):
|
||||
"""
|
||||
Raised when trying to select on table with invalid
|
||||
ORDER BY clause provided
|
||||
"""
|
||||
|
||||
def __init__(self, order_by):
|
||||
super().__init__(
|
||||
"Invalid ORDER BY clause: {order_by}. Must be a string or a list of two values (ordering field name and direction)",
|
||||
order_by=order_by
|
||||
)
|
||||
|
||||
|
||||
class PgDB:
|
||||
class PgDB(DB):
|
||||
""" PostgreSQL client """
|
||||
|
||||
_host = None
|
||||
_user = None
|
||||
_pwd = None
|
||||
_db = None
|
||||
|
||||
date_format = '%Y-%m-%d'
|
||||
datetime_format = '%Y-%m-%d %H:%M:%S'
|
||||
|
||||
def __init__(self, host, user, pwd, db, just_try=False):
|
||||
def __init__(self, host, user, pwd, db, **kwargs):
|
||||
self._host = host
|
||||
self._user = user
|
||||
self._pwd = pwd
|
||||
self._db = db
|
||||
self._conn = None
|
||||
self.just_try = just_try
|
||||
super().__init__(**kwargs)
|
||||
|
||||
def connect(self, exit_on_error=True):
|
||||
""" Connect to PostgreSQL server """
|
||||
|
|
@ -110,7 +52,7 @@ class PgDB:
|
|||
if exit_on_error:
|
||||
sys.exit(1)
|
||||
else:
|
||||
raise PgDBFailToConnect(self._host, self._user, self._db) from err
|
||||
raise DBFailToConnect(f'{self._user}@{self._host}:{self._db}') from err
|
||||
return True
|
||||
|
||||
def close(self):
|
||||
|
|
@ -132,32 +74,6 @@ class PgDB:
|
|||
)
|
||||
return False
|
||||
|
||||
@staticmethod
|
||||
def _log_query(sql, params):
|
||||
log.debug(
|
||||
'Run SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
@staticmethod
|
||||
def _log_query_exception(sql, params):
|
||||
log.exception(
|
||||
'Error during SQL query "%s" %s',
|
||||
sql,
|
||||
"with params = {0}".format( # pylint: disable=consider-using-f-string
|
||||
', '.join([
|
||||
f'{key} = {value}'
|
||||
for key, value in params.items()
|
||||
]) if params else "without params"
|
||||
)
|
||||
)
|
||||
|
||||
def doSQL(self, sql, params=None):
|
||||
"""
|
||||
Run SQL query and commit changes (rollback on error)
|
||||
|
|
@ -213,234 +129,6 @@ class PgDB:
|
|||
for idx, field in enumerate(fields)
|
||||
)
|
||||
|
||||
#
|
||||
# SQL helpers
|
||||
#
|
||||
|
||||
@staticmethod
|
||||
def format_param(param):
|
||||
""" Format SQL query parameter for prepared query """
|
||||
return f'%({param})s'
|
||||
|
||||
@classmethod
|
||||
def _combine_params(cls, params, to_add=None, **kwargs):
|
||||
if to_add:
|
||||
assert isinstance(to_add, dict), "to_add must be a dict or None"
|
||||
params = cls._combine_params(params, **to_add)
|
||||
|
||||
for param, value in kwargs.items():
|
||||
if param in params:
|
||||
raise PgDBDuplicatedSQLParameter(param)
|
||||
params[param] = value
|
||||
return params
|
||||
|
||||
@classmethod
|
||||
def _format_where_clauses(cls, where_clauses, params=None, where_op=None):
|
||||
"""
|
||||
Format WHERE clauses
|
||||
|
||||
:param where_clauses: The WHERE clauses. Could be:
|
||||
- a raw SQL WHERE clause as string
|
||||
- a tuple of two elements: a raw WHERE clause and its parameters as dict
|
||||
- a dict of WHERE clauses with field name as key and WHERE clause value as value
|
||||
- a list of any of previous valid WHERE clauses
|
||||
:param params: Dict of other already set SQL query parameters (optional)
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: AND)
|
||||
|
||||
:return: A tuple of two elements: raw SQL WHERE combined clauses and parameters on success
|
||||
:rtype: string, bool
|
||||
"""
|
||||
if params is None:
|
||||
params = {}
|
||||
if where_op is None:
|
||||
where_op = 'AND'
|
||||
|
||||
if isinstance(where_clauses, str):
|
||||
return (where_clauses, params)
|
||||
|
||||
if isinstance(where_clauses, tuple) and len(where_clauses) == 2 and isinstance(where_clauses[1], dict):
|
||||
cls._combine_params(params, where_clauses[1])
|
||||
return (where_clauses[0], params)
|
||||
|
||||
if isinstance(where_clauses, (list, tuple)):
|
||||
sql_where_clauses = []
|
||||
for where_clause in where_clauses:
|
||||
sql2, params = cls._format_where_clauses(where_clause, params=params, where_op=where_op)
|
||||
sql_where_clauses.append(sql2)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
|
||||
if isinstance(where_clauses, dict):
|
||||
sql_where_clauses = []
|
||||
for field, value in where_clauses.items():
|
||||
param = field
|
||||
if field in params:
|
||||
idx = 1
|
||||
while param in params:
|
||||
param = f'{field}_{idx}'
|
||||
idx += 1
|
||||
cls._combine_params(params, {param: value})
|
||||
sql_where_clauses.append(
|
||||
f'"{field}" = {cls.format_param(param)}'
|
||||
)
|
||||
return (
|
||||
f' {where_op} '.join(sql_where_clauses),
|
||||
params
|
||||
)
|
||||
raise PgDBUnsupportedWHEREClauses(where_clauses)
|
||||
|
||||
@classmethod
|
||||
def _add_where_clauses(cls, sql, params, where_clauses, where_op=None):
|
||||
"""
|
||||
Add WHERE clauses to an SQL query
|
||||
|
||||
:param sql: The SQL query to complete
|
||||
:param params: The dict of parameters of the SQL query to complete
|
||||
:param where_clauses: The WHERE clause (see _format_where_clauses())
|
||||
:param where_op: SQL operator used to combine WHERE clauses together (optional, default: see _format_where_clauses())
|
||||
|
||||
:return:
|
||||
:rtype: A tuple of two elements: raw SQL WHERE combined clauses and parameters
|
||||
"""
|
||||
if where_clauses:
|
||||
sql_where, params = cls._format_where_clauses(where_clauses, params=params, where_op=where_op)
|
||||
sql += " WHERE " + sql_where
|
||||
return (sql, params)
|
||||
|
||||
@staticmethod
|
||||
def _quote_table_name(table):
|
||||
""" Quote table name """
|
||||
return '"{0}"'.format( # pylint: disable=consider-using-f-string
|
||||
'"."'.join(
|
||||
table.split('.')
|
||||
)
|
||||
)
|
||||
|
||||
def insert(self, table, values, just_try=False):
|
||||
""" Run INSERT SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'INSERT INTO {0} ("{1}") VALUES ({2})'.format(
|
||||
self._quote_table_name(table),
|
||||
'", "'.join(values.keys()),
|
||||
", ".join([
|
||||
self.format_param(key)
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute INSERT query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=values):
|
||||
log.error("Fail to execute INSERT query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def update(self, table, values, where_clauses, where_op=None, just_try=False):
|
||||
""" Run UPDATE SQL query """
|
||||
# pylint: disable=consider-using-f-string
|
||||
sql = 'UPDATE {0} SET {1}'.format(
|
||||
self._quote_table_name(table),
|
||||
", ".join([
|
||||
f'"{key}" = {self.format_param(key)}'
|
||||
for key in values
|
||||
])
|
||||
)
|
||||
params = values
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (PgDBDuplicatedSQLParameter, PgDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def delete(self, table, where_clauses, where_op='AND', just_try=False):
|
||||
""" Run DELETE SQL query """
|
||||
sql = f'DELETE FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (PgDBDuplicatedSQLParameter, PgDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute UPDATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql, params=params):
|
||||
log.error("Fail to execute UPDATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def truncate(self, table, just_try=False):
|
||||
""" Run TRUNCATE SQL query """
|
||||
sql = f'TRUNCATE TABLE {self._quote_table_name(table)}'
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute TRUNCATE query: %s", sql)
|
||||
return True
|
||||
|
||||
log.debug(sql)
|
||||
if not self.doSQL(sql):
|
||||
log.error("Fail to execute TRUNCATE query (SQL: %s)", sql)
|
||||
return False
|
||||
return True
|
||||
|
||||
def select(self, table, where_clauses=None, fields=None, where_op='AND', order_by=None, just_try=False):
|
||||
""" Run SELECT SQL query """
|
||||
sql = "SELECT "
|
||||
if fields is None:
|
||||
sql += "*"
|
||||
elif isinstance(fields, str):
|
||||
sql += f'"{fields}"'
|
||||
else:
|
||||
sql += '"{0}"'.format('", "'.join(fields)) # pylint: disable=consider-using-f-string
|
||||
|
||||
sql += f' FROM {self._quote_table_name(table)}'
|
||||
params = {}
|
||||
|
||||
try:
|
||||
sql, params = self._add_where_clauses(sql, params, where_clauses, where_op=where_op)
|
||||
except (PgDBDuplicatedSQLParameter, PgDBUnsupportedWHEREClauses):
|
||||
log.error('Fail to add WHERE clauses', exc_info=True)
|
||||
return False
|
||||
|
||||
if order_by:
|
||||
if isinstance(order_by, str):
|
||||
sql += f' ORDER BY {order_by}'
|
||||
elif (
|
||||
isinstance(order_by, (list, tuple)) and len(order_by) == 2
|
||||
and isinstance(order_by[0], str)
|
||||
and isinstance(order_by[1], str)
|
||||
and order_by[1].upper() in ('ASC', 'UPPER')
|
||||
):
|
||||
sql += f' ORDER BY "{order_by[0]}" {order_by[1].upper()}'
|
||||
else:
|
||||
raise PgDBInvalidOrderByClause(order_by)
|
||||
|
||||
if just_try:
|
||||
log.debug("Just-try mode: execute SELECT query : %s", sql)
|
||||
return just_try
|
||||
|
||||
return self.doSelect(sql, params=params)
|
||||
|
||||
#
|
||||
# Depreated helpers
|
||||
#
|
||||
|
|
|
|||
455
tests/test_mysql.py
Normal file
455
tests/test_mysql.py
Normal file
|
|
@ -0,0 +1,455 @@
|
|||
# pylint: disable=redefined-outer-name,missing-function-docstring,protected-access
|
||||
""" Tests on opening hours helpers """
|
||||
|
||||
import pytest
|
||||
|
||||
from MySQLdb._exceptions import Error
|
||||
|
||||
from mylib.mysql import MyDB
|
||||
|
||||
|
||||
class FakeMySQLdbCursor:
|
||||
""" Fake MySQLdb cursor """
|
||||
|
||||
def __init__(self, expected_sql, expected_params, expected_return, expected_just_try, expected_exception):
|
||||
self.expected_sql = expected_sql
|
||||
self.expected_params = expected_params
|
||||
self.expected_return = expected_return
|
||||
self.expected_just_try = expected_just_try
|
||||
self.expected_exception = expected_exception
|
||||
|
||||
def execute(self, sql, params=None):
|
||||
if self.expected_exception:
|
||||
raise Error(f'{self}.execute({sql}, {params}): expected exception')
|
||||
if self.expected_just_try and not sql.lower().startswith('select '):
|
||||
assert False, f'{self}.execute({sql}, {params}) may not be executed in just try mode'
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert sql == self.expected_sql, "%s.execute(): Invalid SQL query:\n '%s'\nMay be:\n '%s'" % (self, sql, self.expected_sql)
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert params == self.expected_params, "%s.execute(): Invalid params:\n %s\nMay be:\n %s" % (self, params, self.expected_params)
|
||||
return self.expected_return
|
||||
|
||||
@property
|
||||
def description(self):
|
||||
assert self.expected_return
|
||||
assert isinstance(self.expected_return, list)
|
||||
assert isinstance(self.expected_return[0], dict)
|
||||
return [(field, 1, 2, 3) for field in self.expected_return[0].keys()]
|
||||
|
||||
def fetchall(self):
|
||||
if isinstance(self.expected_return, list):
|
||||
return (
|
||||
list(row.values())
|
||||
if isinstance(row, dict) else row
|
||||
for row in self.expected_return
|
||||
)
|
||||
return self.expected_return
|
||||
|
||||
def __repr__(self):
|
||||
return (
|
||||
f'FakeMySQLdbCursor({self.expected_sql}, {self.expected_params}, '
|
||||
f'{self.expected_return}, {self.expected_just_try})'
|
||||
)
|
||||
|
||||
|
||||
class FakeMySQLdb:
|
||||
""" Fake MySQLdb connection """
|
||||
|
||||
expected_sql = None
|
||||
expected_params = None
|
||||
expected_return = True
|
||||
expected_just_try = False
|
||||
expected_exception = False
|
||||
just_try = False
|
||||
|
||||
def __init__(self, **kwargs):
|
||||
allowed_kwargs = dict(db=str, user=str, passwd=(str, None), host=str, charset=str, use_unicode=bool)
|
||||
for arg, value in kwargs.items():
|
||||
assert arg in allowed_kwargs, f'Invalid arg {arg}="{value}"'
|
||||
assert isinstance(value, allowed_kwargs[arg]), \
|
||||
f'Arg {arg} not a {allowed_kwargs[arg]} ({type(value)})'
|
||||
setattr(self, arg, value)
|
||||
|
||||
def close(self):
|
||||
return self.expected_return
|
||||
|
||||
def cursor(self):
|
||||
return FakeMySQLdbCursor(
|
||||
self.expected_sql, self.expected_params,
|
||||
self.expected_return, self.expected_just_try or self.just_try,
|
||||
self.expected_exception
|
||||
)
|
||||
|
||||
def commit(self):
|
||||
self._check_just_try()
|
||||
return self.expected_return
|
||||
|
||||
def rollback(self):
|
||||
self._check_just_try()
|
||||
return self.expected_return
|
||||
|
||||
def _check_just_try(self):
|
||||
if self.just_try:
|
||||
assert False, "May not be executed in just try mode"
|
||||
|
||||
|
||||
def fake_mysqldb_connect(**kwargs):
|
||||
return FakeMySQLdb(**kwargs)
|
||||
|
||||
|
||||
def fake_mysqldb_connect_just_try(**kwargs):
|
||||
con = FakeMySQLdb(**kwargs)
|
||||
con.just_try = True
|
||||
return con
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def test_mydb():
|
||||
return MyDB('127.0.0.1', 'user', 'password', 'dbname')
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def fake_mydb(mocker):
|
||||
mocker.patch('MySQLdb.connect', fake_mysqldb_connect)
|
||||
return MyDB('127.0.0.1', 'user', 'password', 'dbname')
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def fake_just_try_mydb(mocker):
|
||||
mocker.patch('MySQLdb.connect', fake_mysqldb_connect_just_try)
|
||||
return MyDB('127.0.0.1', 'user', 'password', 'dbname', just_try=True)
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def fake_connected_mydb(fake_mydb):
|
||||
fake_mydb.connect()
|
||||
return fake_mydb
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def fake_connected_just_try_mydb(fake_just_try_mydb):
|
||||
fake_just_try_mydb.connect()
|
||||
return fake_just_try_mydb
|
||||
|
||||
|
||||
def generate_mock_args(expected_args=(), expected_kwargs={}, expected_return=True): # pylint: disable=dangerous-default-value
|
||||
def mock_args(*args, **kwargs):
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert args == expected_args, "Invalid call args:\n %s\nMay be:\n %s" % (args, expected_args)
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert kwargs == expected_kwargs, "Invalid call kwargs:\n %s\nMay be:\n %s" % (kwargs, expected_kwargs)
|
||||
return expected_return
|
||||
return mock_args
|
||||
|
||||
|
||||
def mock_doSQL_just_try(self, sql, params=None): # pylint: disable=unused-argument
|
||||
assert False, "doSQL() may not be executed in just try mode"
|
||||
|
||||
|
||||
def generate_mock_doSQL(expected_sql, expected_params={}, expected_return=True): # pylint: disable=dangerous-default-value
|
||||
def mock_doSQL(self, sql, params=None): # pylint: disable=unused-argument
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert sql == expected_sql, "Invalid generated SQL query:\n '%s'\nMay be:\n '%s'" % (sql, expected_sql)
|
||||
# pylint: disable=consider-using-f-string
|
||||
assert params == expected_params, "Invalid generated params:\n %s\nMay be:\n %s" % (params, expected_params)
|
||||
return expected_return
|
||||
return mock_doSQL
|
||||
|
||||
|
||||
# MyDB.doSelect() have same expected parameters as MyDB.doSQL()
|
||||
generate_mock_doSelect = generate_mock_doSQL
|
||||
mock_doSelect_just_try = mock_doSQL_just_try
|
||||
|
||||
#
|
||||
# Test on MyDB helper methods
|
||||
#
|
||||
|
||||
|
||||
def test_combine_params_with_to_add_parameter():
|
||||
assert MyDB._combine_params(dict(test1=1), dict(test2=2)) == dict(
|
||||
test1=1, test2=2
|
||||
)
|
||||
|
||||
|
||||
def test_combine_params_with_kargs():
|
||||
assert MyDB._combine_params(dict(test1=1), test2=2) == dict(
|
||||
test1=1, test2=2
|
||||
)
|
||||
|
||||
|
||||
def test_combine_params_with_kargs_and_to_add_parameter():
|
||||
assert MyDB._combine_params(dict(test1=1), dict(test2=2), test3=3) == dict(
|
||||
test1=1, test2=2, test3=3
|
||||
)
|
||||
|
||||
|
||||
def test_format_where_clauses_params_are_preserved():
|
||||
args = ('test = test', dict(test1=1))
|
||||
assert MyDB._format_where_clauses(*args) == args
|
||||
|
||||
|
||||
def test_format_where_clauses_raw():
|
||||
assert MyDB._format_where_clauses('test = test') == (('test = test'), {})
|
||||
|
||||
|
||||
def test_format_where_clauses_tuple_clause_with_params():
|
||||
where_clauses = (
|
||||
'test1 = %(test1)s AND test2 = %(test2)s',
|
||||
dict(test1=1, test2=2)
|
||||
)
|
||||
assert MyDB._format_where_clauses(where_clauses) == where_clauses
|
||||
|
||||
|
||||
def test_format_where_clauses_dict():
|
||||
where_clauses = dict(test1=1, test2=2)
|
||||
assert MyDB._format_where_clauses(where_clauses) == (
|
||||
'`test1` = %(test1)s AND `test2` = %(test2)s',
|
||||
where_clauses
|
||||
)
|
||||
|
||||
|
||||
def test_format_where_clauses_combined_types():
|
||||
where_clauses = (
|
||||
'test1 = 1',
|
||||
('test2 LIKE %(test2)s', dict(test2=2)),
|
||||
dict(test3=3, test4=4)
|
||||
)
|
||||
assert MyDB._format_where_clauses(where_clauses) == (
|
||||
'test1 = 1 AND test2 LIKE %(test2)s AND `test3` = %(test3)s AND `test4` = %(test4)s',
|
||||
dict(test2=2, test3=3, test4=4)
|
||||
)
|
||||
|
||||
|
||||
def test_format_where_clauses_with_where_op():
|
||||
where_clauses = dict(test1=1, test2=2)
|
||||
assert MyDB._format_where_clauses(where_clauses, where_op='OR') == (
|
||||
'`test1` = %(test1)s OR `test2` = %(test2)s',
|
||||
where_clauses
|
||||
)
|
||||
|
||||
|
||||
def test_add_where_clauses():
|
||||
sql = "SELECT * FROM table"
|
||||
where_clauses = dict(test1=1, test2=2)
|
||||
assert MyDB._add_where_clauses(sql, None, where_clauses) == (
|
||||
sql + ' WHERE `test1` = %(test1)s AND `test2` = %(test2)s',
|
||||
where_clauses
|
||||
)
|
||||
|
||||
|
||||
def test_add_where_clauses_preserved_params():
|
||||
sql = "SELECT * FROM table"
|
||||
where_clauses = dict(test1=1, test2=2)
|
||||
params = dict(fake1=1)
|
||||
assert MyDB._add_where_clauses(sql, params.copy(), where_clauses) == (
|
||||
sql + ' WHERE `test1` = %(test1)s AND `test2` = %(test2)s',
|
||||
dict(**where_clauses, **params)
|
||||
)
|
||||
|
||||
|
||||
def test_add_where_clauses_with_op():
|
||||
sql = "SELECT * FROM table"
|
||||
where_clauses = ('test1=1', 'test2=2')
|
||||
assert MyDB._add_where_clauses(sql, None, where_clauses, where_op='OR') == (
|
||||
sql + ' WHERE test1=1 OR test2=2',
|
||||
{}
|
||||
)
|
||||
|
||||
|
||||
def test_add_where_clauses_with_duplicated_field():
|
||||
sql = "UPDATE table SET test1=%(test1)s"
|
||||
params = dict(test1='new_value')
|
||||
where_clauses = dict(test1='where_value')
|
||||
assert MyDB._add_where_clauses(sql, params, where_clauses) == (
|
||||
sql + ' WHERE `test1` = %(test1_1)s',
|
||||
dict(test1='new_value', test1_1='where_value')
|
||||
)
|
||||
|
||||
|
||||
def test_quote_table_name():
|
||||
assert MyDB._quote_table_name("mytable") == '`mytable`'
|
||||
assert MyDB._quote_table_name("myschema.mytable") == '`myschema`.`mytable`'
|
||||
|
||||
|
||||
def test_insert(mocker, test_mydb):
|
||||
values = dict(test1=1, test2=2)
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSQL',
|
||||
generate_mock_doSQL(
|
||||
'INSERT INTO `mytable` (`test1`, `test2`) VALUES (%(test1)s, %(test2)s)',
|
||||
values
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.insert('mytable', values)
|
||||
|
||||
|
||||
def test_insert_just_try(mocker, test_mydb):
|
||||
mocker.patch('mylib.mysql.MyDB.doSQL', mock_doSQL_just_try)
|
||||
assert test_mydb.insert('mytable', dict(test1=1, test2=2), just_try=True)
|
||||
|
||||
|
||||
def test_update(mocker, test_mydb):
|
||||
values = dict(test1=1, test2=2)
|
||||
where_clauses = dict(test3=3, test4=4)
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSQL',
|
||||
generate_mock_doSQL(
|
||||
'UPDATE `mytable` SET `test1` = %(test1)s, `test2` = %(test2)s WHERE `test3` = %(test3)s AND `test4` = %(test4)s',
|
||||
dict(**values, **where_clauses)
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.update('mytable', values, where_clauses)
|
||||
|
||||
|
||||
def test_update_just_try(mocker, test_mydb):
|
||||
mocker.patch('mylib.mysql.MyDB.doSQL', mock_doSQL_just_try)
|
||||
assert test_mydb.update('mytable', dict(test1=1, test2=2), None, just_try=True)
|
||||
|
||||
|
||||
def test_delete(mocker, test_mydb):
|
||||
where_clauses = dict(test1=1, test2=2)
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSQL',
|
||||
generate_mock_doSQL(
|
||||
'DELETE FROM `mytable` WHERE `test1` = %(test1)s AND `test2` = %(test2)s',
|
||||
where_clauses
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.delete('mytable', where_clauses)
|
||||
|
||||
|
||||
def test_delete_just_try(mocker, test_mydb):
|
||||
mocker.patch('mylib.mysql.MyDB.doSQL', mock_doSQL_just_try)
|
||||
assert test_mydb.delete('mytable', None, just_try=True)
|
||||
|
||||
|
||||
def test_truncate(mocker, test_mydb):
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSQL',
|
||||
generate_mock_doSQL('TRUNCATE TABLE `mytable`', None)
|
||||
)
|
||||
|
||||
assert test_mydb.truncate('mytable')
|
||||
|
||||
|
||||
def test_truncate_just_try(mocker, test_mydb):
|
||||
mocker.patch('mylib.mysql.MyDB.doSQL', mock_doSelect_just_try)
|
||||
assert test_mydb.truncate('mytable', just_try=True)
|
||||
|
||||
|
||||
def test_select(mocker, test_mydb):
|
||||
fields = ('field1', 'field2')
|
||||
where_clauses = dict(test3=3, test4=4)
|
||||
expected_return = [
|
||||
dict(field1=1, field2=2),
|
||||
dict(field1=2, field2=3),
|
||||
]
|
||||
order_by = "field1, DESC"
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSelect',
|
||||
generate_mock_doSQL(
|
||||
'SELECT `field1`, `field2` FROM `mytable` WHERE `test3` = %(test3)s AND `test4` = %(test4)s ORDER BY ' + order_by,
|
||||
where_clauses, expected_return
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.select('mytable', where_clauses, fields, order_by=order_by) == expected_return
|
||||
|
||||
|
||||
def test_select_without_field_and_order_by(mocker, test_mydb):
|
||||
mocker.patch(
|
||||
'mylib.mysql.MyDB.doSelect',
|
||||
generate_mock_doSQL(
|
||||
'SELECT * FROM `mytable`'
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.select('mytable')
|
||||
|
||||
|
||||
def test_select_just_try(mocker, test_mydb):
|
||||
mocker.patch('mylib.mysql.MyDB.doSQL', mock_doSelect_just_try)
|
||||
assert test_mydb.select('mytable', None, None, just_try=True)
|
||||
|
||||
#
|
||||
# Tests on main methods
|
||||
#
|
||||
|
||||
|
||||
def test_connect(mocker, test_mydb):
|
||||
expected_kwargs = dict(
|
||||
db=test_mydb._db,
|
||||
user=test_mydb._user,
|
||||
host=test_mydb._host,
|
||||
passwd=test_mydb._pwd,
|
||||
charset=test_mydb._charset,
|
||||
use_unicode=True,
|
||||
)
|
||||
|
||||
mocker.patch(
|
||||
'MySQLdb.connect',
|
||||
generate_mock_args(
|
||||
expected_kwargs=expected_kwargs
|
||||
)
|
||||
)
|
||||
|
||||
assert test_mydb.connect()
|
||||
|
||||
|
||||
def test_close(fake_mydb):
|
||||
assert fake_mydb.close() is None
|
||||
|
||||
|
||||
def test_close_connected(fake_connected_mydb):
|
||||
assert fake_connected_mydb.close() is None
|
||||
|
||||
|
||||
def test_doSQL(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_sql = 'DELETE FROM table WHERE test1 = %(test1)s'
|
||||
fake_connected_mydb._conn.expected_params = dict(test1=1)
|
||||
fake_connected_mydb.doSQL(fake_connected_mydb._conn.expected_sql, fake_connected_mydb._conn.expected_params)
|
||||
|
||||
|
||||
def test_doSQL_without_params(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_sql = 'DELETE FROM table'
|
||||
fake_connected_mydb.doSQL(fake_connected_mydb._conn.expected_sql)
|
||||
|
||||
|
||||
def test_doSQL_just_try(fake_connected_just_try_mydb):
|
||||
assert fake_connected_just_try_mydb.doSQL('DELETE FROM table')
|
||||
|
||||
|
||||
def test_doSQL_on_exception(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_exception = True
|
||||
assert fake_connected_mydb.doSQL('DELETE FROM table') is False
|
||||
|
||||
|
||||
def test_doSelect(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_sql = 'SELECT * FROM table WHERE test1 = %(test1)s'
|
||||
fake_connected_mydb._conn.expected_params = dict(test1=1)
|
||||
fake_connected_mydb._conn.expected_return = [dict(test1=1)]
|
||||
assert fake_connected_mydb.doSelect(fake_connected_mydb._conn.expected_sql, fake_connected_mydb._conn.expected_params) == fake_connected_mydb._conn.expected_return
|
||||
|
||||
|
||||
def test_doSelect_without_params(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_sql = 'SELECT * FROM table'
|
||||
fake_connected_mydb._conn.expected_return = [dict(test1=1)]
|
||||
assert fake_connected_mydb.doSelect(fake_connected_mydb._conn.expected_sql) == fake_connected_mydb._conn.expected_return
|
||||
|
||||
|
||||
def test_doSelect_on_exception(fake_connected_mydb):
|
||||
fake_connected_mydb._conn.expected_exception = True
|
||||
assert fake_connected_mydb.doSelect('SELECT * FROM table') is False
|
||||
|
||||
|
||||
def test_doSelect_just_try(fake_connected_just_try_mydb):
|
||||
fake_connected_just_try_mydb._conn.expected_sql = 'SELECT * FROM table WHERE test1 = %(test1)s'
|
||||
fake_connected_just_try_mydb._conn.expected_params = dict(test1=1)
|
||||
fake_connected_just_try_mydb._conn.expected_return = [dict(test1=1)]
|
||||
assert fake_connected_just_try_mydb.doSelect(
|
||||
fake_connected_just_try_mydb._conn.expected_sql,
|
||||
fake_connected_just_try_mydb._conn.expected_params
|
||||
) == fake_connected_just_try_mydb._conn.expected_return
|
||||
Loading…
Reference in a new issue