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