148 lines
4.9 KiB
Python
148 lines
4.9 KiB
Python
"""
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ADO MSSQL database backend for Django.
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Requires adodbapi 2.0.1: http://adodbapi.sourceforge.net/
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"""
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from django.db.backends import util
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try:
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import adodbapi as Database
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except ImportError, e:
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from django.core.exceptions import ImproperlyConfigured
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raise ImproperlyConfigured, "Error loading adodbapi module: %s" % e
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import datetime
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try:
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import mx
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except ImportError:
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mx = None
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DatabaseError = Database.DatabaseError
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# We need to use a special Cursor class because adodbapi expects question-mark
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# param style, but Django expects "%s". This cursor converts question marks to
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# format-string style.
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class Cursor(Database.Cursor):
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def executeHelper(self, operation, isStoredProcedureCall, parameters=None):
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if parameters is not None and "%s" in operation:
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operation = operation.replace("%s", "?")
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Database.Cursor.executeHelper(self, operation, isStoredProcedureCall, parameters)
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class Connection(Database.Connection):
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def cursor(self):
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return Cursor(self)
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Database.Connection = Connection
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origCVtoP = Database.convertVariantToPython
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def variantToPython(variant, adType):
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if type(variant) == bool and adType == 11:
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return variant # bool not 1/0
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res = origCVtoP(variant, adType)
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if mx is not None and type(res) == mx.DateTime.mxDateTime.DateTimeType:
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# Convert ms.DateTime objects to Python datetime.datetime objects.
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tv = list(res.tuple()[:7])
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tv[-2] = int(tv[-2])
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return datetime.datetime(*tuple(tv))
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if type(res) == float and str(res)[-2:] == ".0":
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return int(res) # If float but int, then int.
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return res
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Database.convertVariantToPython = variantToPython
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try:
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# Only exists in Python 2.4+
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from threading import local
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except ImportError:
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# Import copy of _thread_local.py from Python 2.4
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from django.utils._threading_local import local
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class DatabaseWrapper(local):
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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 import settings
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if self.connection is None:
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if settings.DATABASE_NAME == '' or settings.DATABASE_USER == '':
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from django.core.exceptions import ImproperlyConfigured
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raise ImproperlyConfigured, "You need to specify both DATABASE_NAME and DATABASE_USER in your Django settings file."
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if not settings.DATABASE_HOST:
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settings.DATABASE_HOST = "127.0.0.1"
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# TODO: Handle DATABASE_PORT.
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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)
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self.connection = Database.connect(conn_string)
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cursor = self.connection.cursor()
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if settings.DEBUG:
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return util.CursorDebugWrapper(cursor, self)
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return cursor
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def _commit(self):
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return self.connection.commit()
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def _rollback(self):
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if self.connection:
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return 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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supports_constraints = True
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def quote_name(name):
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if name.startswith('[') and name.endswith(']'):
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return name # Quoting once is enough.
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return '[%s]' % name
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dictfetchone = util.dictfetchone
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dictfetchmany = util.dictfetchmany
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dictfetchall = util.dictfetchall
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def get_last_insert_id(cursor, table_name, pk_name):
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cursor.execute("SELECT %s FROM %s WHERE %s = @@IDENTITY" % (pk_name, table_name, pk_name))
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return cursor.fetchone()[0]
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def get_date_extract_sql(lookup_type, table_name):
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# lookup_type is 'year', 'month', 'day'
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return "DATEPART(%s, %s)" % (lookup_type, table_name)
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def get_date_trunc_sql(lookup_type, field_name):
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# lookup_type is 'year', 'month', 'day'
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if lookup_type=='year':
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return "Convert(datetime, Convert(varchar, DATEPART(year, %s)) + '/01/01')" % field_name
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if lookup_type=='month':
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return "Convert(datetime, Convert(varchar, DATEPART(year, %s)) + '/' + Convert(varchar, DATEPART(month, %s)) + '/01')" % (field_name, field_name)
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if lookup_type=='day':
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return "Convert(datetime, Convert(varchar(12), %s))" % field_name
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def get_limit_offset_sql(limit, offset=None):
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# TODO: This is a guess. Make sure this is correct.
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sql = "LIMIT %s" % limit
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if offset and offset != 0:
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sql += " OFFSET %s" % offset
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return sql
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def get_random_function_sql():
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return "RAND()"
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def get_fulltext_search_sql(field_name):
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raise NotImplementedError
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def get_drop_foreignkey_sql():
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return "DROP CONSTRAINT"
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OPERATOR_MAPPING = {
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'exact': '= %s',
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'iexact': 'LIKE %s',
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'contains': 'LIKE %s',
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'icontains': 'LIKE %s',
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'gt': '> %s',
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'gte': '>= %s',
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'lt': '< %s',
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'lte': '<= %s',
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'startswith': 'LIKE %s',
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'endswith': 'LIKE %s',
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'istartswith': 'LIKE %s',
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'iendswith': 'LIKE %s',
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}
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