Issue #25 -- Fix Django 3.2 startup issue

mssql/compiler.py

@@ -13,7 +13,8 @@
 from django.db.models.sql import compiler
 from django.db.transaction import TransactionManagementError
 from django.db.utils import NotSupportedError
-from django.db.models.fields.json import compile_json_path, KeyTransform as json_KeyTransform
+if django.VERSION >= (3, 1):
+    from django.db.models.fields.json import compile_json_path, KeyTransform as json_KeyTransform
 
 def _as_sql_agv(self, compiler, connection):
     return self.as_sql(compiler, connection, template='%(function)s(CONVERT(float, %(field)s))')
@@ -387,8 +388,6 @@ def _as_microsoft(self, node):
             as_microsoft = _as_sql_count
         elif isinstance(node, Greatest):
             as_microsoft = _as_sql_greatest
-        if isinstance(node, json_KeyTransform):
-            as_microsoft = _as_sql_json_keytransform
         elif isinstance(node, Least):
             as_microsoft = _as_sql_least
         elif isinstance(node, Length):
@@ -409,6 +408,9 @@ def _as_microsoft(self, node):
             as_microsoft = _as_sql_trim
         elif isinstance(node, Variance):
             as_microsoft = _as_sql_variance
+        if django.VERSION >= (3, 1):
+            if isinstance(node, json_KeyTransform):
+                as_microsoft = _as_sql_json_keytransform
         if as_microsoft:
             node = node.copy()
             node.as_microsoft = types.MethodType(as_microsoft, node)

mssql/functions.py

@@ -7,7 +7,8 @@
 from django.db.models.functions.math import ATan2, Log, Ln, Mod, Round
 from django.db.models.expressions import Case, Exists, OrderBy, When
 from django.db.models.lookups import Lookup, In, Exact
-from django.db.models.fields.json import KeyTransform, KeyTransformExact
+if VERSION >= (3, 1):
+    from django.db.models.fields.json import KeyTransform, KeyTransformExact
 
 DJANGO3 = VERSION[0] >= 3
 
@@ -120,7 +121,8 @@ def KeyTransformExact_process_rhs(self, compiler, connection):
 
 ATan2.as_microsoft = sqlserver_atan2
 In.split_parameter_list_as_sql = split_parameter_list_as_sql
-KeyTransformExact.process_rhs = KeyTransformExact_process_rhs
+if VERSION >= (3, 1):
+    KeyTransformExact.process_rhs = KeyTransformExact_process_rhs
 Ln.as_microsoft = sqlserver_ln
 Log.as_microsoft = sqlserver_log
 Mod.as_microsoft = sqlserver_mod

mssql/schema.py

@@ -235,6 +235,7 @@ def _db_table_delete_constraint_sql(self, template, db_table, name):
             template,
             table=Table(db_table, self.quote_name),
             name=self.quote_name(name),
+            include=''
         )
 
     def alter_db_table(self, model, old_db_table, new_db_table):
@@ -689,7 +690,7 @@ def add_field(self, model, field):
         if self.connection.features.connection_persists_old_columns:
             self.connection.close()
 
-    def _create_unique_sql(self, model, columns, name=None, condition=None, deferrable=None):
+    def _create_unique_sql(self, model, columns, name=None, condition=None, deferrable=None, include=None, opclasses=None):
         if (deferrable and not getattr(self.connection.features, 'supports_deferrable_unique_constraints', False)):
             return None
 
@@ -713,20 +714,22 @@ def create_unique_name(*args, **kwargs):
                 name=name,
                 columns=columns,
                 condition=' WHERE ' + condition,
-                **statement_args
+                **statement_args,
+                include='',
             ) if self.connection.features.supports_partial_indexes else None
         else:
             return Statement(
                 self.sql_create_unique,
                 table=table,
                 name=name,
                 columns=columns,
-                **statement_args
+                **statement_args,
+                include='',
             )
 
     def _create_index_sql(self, model, fields, *, name=None, suffix='', using='',
                           db_tablespace=None, col_suffixes=(), sql=None, opclasses=(),
-                          condition=None):
+                          condition=None, include=None, expressions=None):
         """
         Return the SQL statement to create the index for one or several fields.
         `sql` can be specified if the syntax differs from the standard (GIS
@@ -751,6 +754,7 @@ def create_index_name(*args, **kwargs):
             columns=self._index_columns(table, columns, col_suffixes, opclasses),
             extra=tablespace_sql,
             condition=(' WHERE ' + condition) if condition else '',
+            include=''
         )
 
     def create_model(self, model):

testapp/settings.py

@@ -36,6 +36,8 @@
     'django.contrib.auth.hashers.PBKDF2PasswordHasher',
 ]
 
+DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
+
 ENABLE_REGEX_TESTS = False
 
 TEST_RUNNER = "testapp.runners.ExcludedTestSuiteRunner"

tox.ini

@@ -3,6 +3,7 @@ envlist =
        {py36,py37}-django22,
        {py36,py37,py38}-django30,
        {py36,py37,py38}-django31,
+       {py36,py37,py38,py39}-django32
 
 [testenv]
 allowlist_externals =
@@ -17,3 +18,4 @@ deps =
     django22: django==2.2.*
     django30: django>=3.0,<3.1
     django31: django>=3.1,<3.2
+    django32: django==3.2.*