django1/django/core/db/backends/mysql.py

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"""
MySQL database backend for Django.
Requires MySQLdb: http://sourceforge.net/projects/mysql-python
"""
from django.core.db import base, typecasts
import MySQLdb as Database
from MySQLdb.converters import conversions
from MySQLdb.constants import FIELD_TYPE
import types
DatabaseError = Database.DatabaseError
django_conversions = conversions.copy()
django_conversions.update({
types.BooleanType: typecasts.rev_typecast_boolean,
FIELD_TYPE.DATETIME: typecasts.typecast_timestamp,
FIELD_TYPE.DATE: typecasts.typecast_date,
FIELD_TYPE.TIME: typecasts.typecast_time,
})
class DatabaseWrapper:
def __init__(self):
self.connection = None
self.queries = []
def cursor(self):
from django.conf.settings import DATABASE_USER, DATABASE_NAME, DATABASE_HOST, DATABASE_PASSWORD, DEBUG
if self.connection is None:
self.connection = Database.connect(user=DATABASE_USER, db=DATABASE_NAME,
passwd=DATABASE_PASSWORD, host=DATABASE_HOST, conv=django_conversions)
if DEBUG:
return base.CursorDebugWrapper(self.connection.cursor(), self)
return self.connection.cursor()
def commit(self):
pass
def rollback(self):
pass
def close(self):
if self.connection is not None:
self.connection.close()
self.connection = None
def dictfetchone(cursor):
"Returns a row from the cursor as a dict"
raise NotImplementedError
def dictfetchmany(cursor, number):
"Returns a certain number of rows from a cursor as a dict"
raise NotImplementedError
def dictfetchall(cursor):
"Returns all rows from a cursor as a dict"
raise NotImplementedError
def get_last_insert_id(cursor, table_name, pk_name):
cursor.execute("SELECT LAST_INSERT_ID()")
return cursor.fetchone()[0]
OPERATOR_MAPPING = {
'exact': '=',
'iexact': 'LIKE',
'contains': 'LIKE',
'icontains': 'LIKE',
'ne': '!=',
'gt': '>',
'gte': '>=',
'lt': '<',
'lte': '<=',
'startswith': 'LIKE',
'endswith': 'LIKE'
}
# This dictionary maps Field objects to their associated MySQL column
# types, as strings. Column-type strings can contain format strings; they'll
# be interpolated against the values of Field.__dict__ before being output.
# If a column type is set to None, it won't be included in the output.
DATA_TYPES = {
'AutoField': 'mediumint(9) auto_increment',
'BooleanField': 'bool',
'CharField': 'varchar(%(maxlength)s)',
'CommaSeparatedIntegerField': 'varchar(%(maxlength)s)',
'DateField': 'date',
'DateTimeField': 'datetime',
'EmailField': 'varchar(75)',
'FileField': 'varchar(100)',
'FloatField': 'numeric(%(max_digits)s, %(decimal_places)s)',
'ImageField': 'varchar(100)',
'IntegerField': 'integer',
'IPAddressField': 'char(15)',
'ManyToManyField': None,
'NullBooleanField': 'bool',
'PhoneNumberField': 'varchar(20)',
'PositiveIntegerField': 'integer UNSIGNED',
'PositiveSmallIntegerField': 'smallint UNSIGNED',
'SlugField': 'varchar(50)',
'SmallIntegerField': 'smallint',
'TextField': 'text',
'TimeField': 'time',
'URLField': 'varchar(200)',
'USStateField': 'varchar(2)',
'XMLField': 'text',
}