Fixed #27533 -- Fixed inspectdb crash if a unique constraint uses an unsupported type.

1 files changed, 12 insertions, 4 deletions

diff --git a/django/core/management/commands/inspectdb.py b/django/core/management/commands/inspectdb.py
index 31c4ae062b..c84ce14739 100644
--- a/django/core/management/commands/inspectdb.py
+++ b/django/core/management/commands/inspectdb.py
@@ -269,16 +269,24 @@ class Command(BaseCommand):
         to the given database table name.
         """
         unique_together = []
+        has_unsupported_constraint = False
         for params in constraints.values():
             if params['unique']:
                 columns = params['columns']
+                if None in columns:
+                    has_unsupported_constraint = True
+                columns = [x for x in columns if x is not None]
                 if len(columns) > 1:
                     unique_together.append(str(tuple(column_to_field_name[c] for c in columns)))
         managed_comment = "  # Created from a view. Don't remove." if is_view else ""
-        meta = ["",
-                "    class Meta:",
-                "        managed = False%s" % managed_comment,
-                "        db_table = '%s'" % table_name]
+        meta = ['']
+        if has_unsupported_constraint:
+            meta.append('    # A unique constraint could not be introspected.')
+        meta += [
+            '    class Meta:',
+            '        managed = False%s' % managed_comment,
+            '        db_table = %r' % table_name
+        ]
         if unique_together:
             tup = '(' + ', '.join(unique_together) + ',)'
             meta += ["        unique_together = %s" % tup]