fix issue avidal#6

Author: michiya

README.md

@@ -8,6 +8,7 @@ supports SQL Server 2000 and 2005.
 Features
 --------
 
+* Supports Django 1.2 or newer.
 * Supports LIMIT+OFFSET and offset w/o LIMIT emulation under SS2005.
 * Supports LIMIT+OFFSET under SS2000.
 * Transparently supports Django's TextField both under SS2000 and SS2005.
@@ -114,6 +115,7 @@ Credits
 
 * [Alex Vidal](https://github.com/avidal)
 * [Dan Loewenherz](http://dlo.me)
+* [Michiya Takahashi](https://github.com/michiya)
 * [Filip Wasilewski](http://code.djangoproject.com/ticket/5246)
 * [Ramiro Morales](http://djangopeople.net/ramiro/)
 * [Wei guangjing](http://djangopeople.net/vcc/)

django_pyodbc/base.py

@@ -33,12 +33,8 @@
     _DJANGO_VERSION = 13
 elif DjangoVersion[:2] == (1,2):
     _DJANGO_VERSION = 12
-elif DjangoVersion[:2] == (1,1):
-    _DJANGO_VERSION = 11
-elif DjangoVersion[:2] == (1,0):
-    _DJANGO_VERSION = 10
 else:
-    _DJANGO_VERSION = 9
+    raise ImproperlyConfigured("Django %d.%d is not supported." % DjangoVersion[:2])
 
 from django_pyodbc.operations import DatabaseOperations
 from django_pyodbc.client import DatabaseClient
@@ -49,6 +45,7 @@
 
 logger = logging.getLogger(__name__)
 
+collation = 'Latin1_General_CI_AS'
 try:
     if hasattr(settings, 'DATABASE_COLLATION'):
         warnings.warn(
@@ -59,7 +56,7 @@
     elif 'collation' in settings.DATABASE_OPTIONS:
         collation = settings.DATABASE_OPTIONS['collation']
 except AttributeError:
-    collation = 'Latin1_General_CI_AS'
+    pass
 
 deprecated = (
     ('DATABASE_ODBC_DRIVER', 'driver'),
@@ -77,7 +74,6 @@
 IntegrityError = Database.IntegrityError
 
 class DatabaseFeatures(BaseDatabaseFeatures):
-    uses_custom_query_class = True
     can_use_chunked_reads = False
     can_return_id_from_insert = True
     #uses_savepoints = True
@@ -141,10 +137,7 @@ def __init__(self, *args, **kwargs):
         self.client = DatabaseClient(self)
         self.creation = DatabaseCreation(self)
         self.introspection = DatabaseIntrospection(self)
-        if _DJANGO_VERSION >= 12:
-            self.validation = BaseDatabaseValidation(self)
-        else:
-            self.validation = BaseDatabaseValidation()
+        self.validation = BaseDatabaseValidation(self)
 
         self.connection = None
 

django_pyodbc/operations.py

@@ -1,13 +1,16 @@
 from django.db.backends import BaseDatabaseOperations
-from django_pyodbc import query
 import datetime
 import time
 import decimal
 
 class DatabaseOperations(BaseDatabaseOperations):
     compiler_module = "django_pyodbc.compiler"
     def __init__(self, connection):
-        super(DatabaseOperations, self).__init__(connection)
+        if connection._DJANGO_VERSION >= 14:
+            super(DatabaseOperations, self).__init__(connection)
+        else:
+            super(DatabaseOperations, self).__init__()
+
         self.connection = connection
         self._ss_ver = None
 
@@ -111,15 +114,6 @@ def lookup_cast(self, lookup_type):
             return "UPPER(%s)"
         return "%s"
 
-    def query_class(self, DefaultQueryClass):
-        """
-        Given the default Query class, returns a custom Query class
-        to use for this backend. Returns None if a custom Query isn't used.
-        See also BaseDatabaseFeatures.uses_custom_query_class, which regulates
-        whether this method is called at all.
-        """
-        return query.query_class(DefaultQueryClass)
-
     def quote_name(self, name):
         """
         Returns a quoted version of the given table, index or column name. Does