119 lines
4.4 KiB
Python
119 lines
4.4 KiB
Python
"""
|
|
ADO MSSQL database backend for Django.
|
|
|
|
Requires adodbapi 2.0.1: http://adodbapi.sourceforge.net/
|
|
"""
|
|
|
|
from django.db.backends import BaseDatabaseWrapper, BaseDatabaseOperations, util
|
|
try:
|
|
import adodbapi as Database
|
|
except ImportError, e:
|
|
from django.core.exceptions import ImproperlyConfigured
|
|
raise ImproperlyConfigured, "Error loading adodbapi module: %s" % e
|
|
import datetime
|
|
try:
|
|
import mx
|
|
except ImportError:
|
|
mx = None
|
|
|
|
DatabaseError = Database.DatabaseError
|
|
IntegrityError = Database.IntegrityError
|
|
|
|
# We need to use a special Cursor class because adodbapi expects question-mark
|
|
# param style, but Django expects "%s". This cursor converts question marks to
|
|
# format-string style.
|
|
class Cursor(Database.Cursor):
|
|
def executeHelper(self, operation, isStoredProcedureCall, parameters=None):
|
|
if parameters is not None and "%s" in operation:
|
|
operation = operation.replace("%s", "?")
|
|
Database.Cursor.executeHelper(self, operation, isStoredProcedureCall, parameters)
|
|
|
|
class Connection(Database.Connection):
|
|
def cursor(self):
|
|
return Cursor(self)
|
|
Database.Connection = Connection
|
|
|
|
origCVtoP = Database.convertVariantToPython
|
|
def variantToPython(variant, adType):
|
|
if type(variant) == bool and adType == 11:
|
|
return variant # bool not 1/0
|
|
res = origCVtoP(variant, adType)
|
|
if mx is not None and type(res) == mx.DateTime.mxDateTime.DateTimeType:
|
|
# Convert ms.DateTime objects to Python datetime.datetime objects.
|
|
tv = list(res.tuple()[:7])
|
|
tv[-2] = int(tv[-2])
|
|
return datetime.datetime(*tuple(tv))
|
|
if type(res) == float and str(res)[-2:] == ".0":
|
|
return int(res) # If float but int, then int.
|
|
return res
|
|
Database.convertVariantToPython = variantToPython
|
|
|
|
class DatabaseOperations(BaseDatabaseOperations):
|
|
def date_extract_sql(self, lookup_type, field_name):
|
|
return "DATEPART(%s, %s)" % (lookup_type, field_name)
|
|
|
|
def date_trunc_sql(self, lookup_type, field_name):
|
|
if lookup_type == 'year':
|
|
return "Convert(datetime, Convert(varchar, DATEPART(year, %s)) + '/01/01')" % field_name
|
|
if lookup_type == 'month':
|
|
return "Convert(datetime, Convert(varchar, DATEPART(year, %s)) + '/' + Convert(varchar, DATEPART(month, %s)) + '/01')" % (field_name, field_name)
|
|
if lookup_type == 'day':
|
|
return "Convert(datetime, Convert(varchar(12), %s))" % field_name
|
|
|
|
def deferrable_sql(self):
|
|
return " DEFERRABLE INITIALLY DEFERRED"
|
|
|
|
def last_insert_id(self, cursor, table_name, pk_name):
|
|
cursor.execute("SELECT %s FROM %s WHERE %s = @@IDENTITY" % (pk_name, table_name, pk_name))
|
|
return cursor.fetchone()[0]
|
|
|
|
def quote_name(self, name):
|
|
if name.startswith('[') and name.endswith(']'):
|
|
return name # Quoting once is enough.
|
|
return '[%s]' % name
|
|
|
|
def random_function_sql(self):
|
|
return 'RAND()'
|
|
|
|
def tablespace_sql(self, tablespace, inline=False):
|
|
return "ON %s" % self.quote_name(tablespace)
|
|
|
|
class DatabaseWrapper(BaseDatabaseWrapper):
|
|
ops = DatabaseOperations()
|
|
|
|
def _cursor(self, settings):
|
|
if self.connection is None:
|
|
if settings.DATABASE_NAME == '' or settings.DATABASE_USER == '':
|
|
from django.core.exceptions import ImproperlyConfigured
|
|
raise ImproperlyConfigured("You need to specify both DATABASE_NAME and DATABASE_USER in your Django settings file.")
|
|
if not settings.DATABASE_HOST:
|
|
settings.DATABASE_HOST = "127.0.0.1"
|
|
# TODO: Handle DATABASE_PORT.
|
|
conn_string = "PROVIDER=SQLOLEDB;DATA SOURCE=%s;UID=%s;PWD=%s;DATABASE=%s" % (settings.DATABASE_HOST, settings.DATABASE_USER, settings.DATABASE_PASSWORD, settings.DATABASE_NAME)
|
|
self.connection = Database.connect(conn_string)
|
|
return self.connection.cursor()
|
|
|
|
allows_group_by_ordinal = True
|
|
allows_unique_and_pk = True
|
|
autoindexes_primary_keys = True
|
|
needs_datetime_string_cast = True
|
|
needs_upper_for_iops = False
|
|
supports_constraints = True
|
|
supports_tablespaces = True
|
|
uses_case_insensitive_names = False
|
|
|
|
OPERATOR_MAPPING = {
|
|
'exact': '= %s',
|
|
'iexact': 'LIKE %s',
|
|
'contains': 'LIKE %s',
|
|
'icontains': 'LIKE %s',
|
|
'gt': '> %s',
|
|
'gte': '>= %s',
|
|
'lt': '< %s',
|
|
'lte': '<= %s',
|
|
'startswith': 'LIKE %s',
|
|
'endswith': 'LIKE %s',
|
|
'istartswith': 'LIKE %s',
|
|
'iendswith': 'LIKE %s',
|
|
}
|