diff options
Diffstat (limited to 'django/db/models/sql')
| -rw-r--r-- | django/db/models/sql/compiler.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py index 14a727e998..2543755952 100644 --- a/django/db/models/sql/compiler.py +++ b/django/db/models/sql/compiler.py @@ -161,7 +161,12 @@ class SQLCompiler: # present in the grouped columns. This is done by identifying all # tables that have their primary key included in the grouped # columns and removing non-primary key columns referring to them. - pks = {expr for expr in expressions if hasattr(expr, 'target') and expr.target.primary_key} + # Unmanaged models are excluded because they could be representing + # database views on which the optimization might not be allowed. + pks = { + expr for expr in expressions + if hasattr(expr, 'target') and expr.target.primary_key and expr.target.model._meta.managed + } aliases = {expr.alias for expr in pks} expressions = [ expr for expr in expressions if expr in pks or getattr(expr, 'alias', None) not in aliases |