Fix inspectdb (#96)

Author: aceofwings

sql_server/pyodbc/base.py

@@ -89,6 +89,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         'OneToOneField': 'int',
         'PositiveIntegerField': 'int',
         'PositiveSmallIntegerField': 'smallint',
+        'PositiveBigIntegerField': 'bigint',
         'SlugField': 'nvarchar(%(max_length)s)',
         'SmallAutoField': 'smallint IDENTITY (1, 1)',
         'SmallIntegerField': 'smallint',

sql_server/pyodbc/features.py

@@ -3,6 +3,8 @@
 
 
 class DatabaseFeatures(BaseDatabaseFeatures):
+    can_introspect_json_field = False
+    has_native_json_field = False
     has_native_uuid_field = False
     allow_sliced_subqueries_with_in = False
     can_introspect_autofield = True
@@ -57,3 +59,11 @@ def supports_partial_indexes(self):
     @cached_property
     def supports_functions_in_partial_indexes(self):
         return self.connection.sql_server_version > 2005
+
+    @cached_property
+    def introspected_field_types(self):
+        return {
+            **super().introspected_field_types,
+            'GenericIPAddressField': 'CharField',
+            'PositiveBigIntegerField': 'BigIntegerField'
+        }

sql_server/pyodbc/introspection.py

@@ -1,13 +1,16 @@
 import pyodbc as Database
+from collections import namedtuple
 
 from django.db.backends.base.introspection import (
-    BaseDatabaseIntrospection, FieldInfo, TableInfo,
+    BaseDatabaseIntrospection, TableInfo,
 )
 from django.db.models.indexes import Index
 
 SQL_AUTOFIELD = -777555
 SQL_BIGAUTOFIELD = -777444
 
+FieldInfo = namedtuple('FieldInfo', 'name type_code display_size internal_size precision scale null_ok default')
+
 
 class DatabaseIntrospection(BaseDatabaseIntrospection):
     # Map type codes to Django Field types.

testapp/settings.py

@@ -113,8 +113,6 @@
     'indexes.tests.PartialIndexTests.test_multiple_conditions',
     'indexes.tests.SchemaIndexesNotPostgreSQLTests.test_create_index_ignores_opclasses',
     'inspectdb.tests.InspectDBTestCase.test_introspection_errors',
-    'inspectdb.tests.InspectDBTestCase.test_json_field',
-    'inspectdb.tests.InspectDBTestCase.test_number_field_types',
     'introspection.tests.IntrospectionTests.test_get_constraints',
     'introspection.tests.IntrospectionTests.test_get_table_description_types',
     'introspection.tests.IntrospectionTests.test_smallautofield',