Fixed #30859 -- Fixed DatabaseFeatures.supports_aggregate_filter_clause on SQLite 3.30.1+.

django/db/backends/sqlite3/features.py

@@ -43,3 +43,4 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     supports_functions_in_partial_indexes = Database.sqlite_version_info >= (3, 15, 0)
     supports_over_clause = Database.sqlite_version_info >= (3, 25, 0)
     supports_frame_range_fixed_distance = Database.sqlite_version_info >= (3, 28, 0)
+    supports_aggregate_filter_clause = Database.sqlite_version_info >= (3, 30, 1)

django/db/backends/sqlite3/operations.py

@@ -46,7 +46,7 @@ class DatabaseOperations(BaseDatabaseOperations):
             for expr in expression.get_source_expressions():
                 try:
                     output_field = expr.output_field
-                except FieldError:
+                except (AttributeError, FieldError):
                     # Not every subexpression has an output_field which is fine
                     # to ignore.
                     pass