| 550 | 550 | Perform a COUNT() query using the current filter constraints. |
| 551 | 551 | """ |
| 552 | 552 | obj = self.clone() |
| 553 | # Strip unused annotations to improve performance | |
| 554 | obj._strip_unused_annotations_for_count() | |
| 553 | 555 | obj.add_annotation(Count("*"), alias="__count", is_summary=True) |
| 554 | 556 | return obj.get_aggregation(using, ["__count"])["__count"] |
| 555 | 557 | |
| 558 | def _strip_unused_annotations_for_count(self): | |
| 559 | """ | |
| 560 | Remove annotations that are not referenced in filters, other annotations, | |
| 561 | or ordering to optimize count queries. | |
| 562 | """ | |
| 563 | if not self.annotations: | |
| 564 | return | |
| 565 | ||
| 566 | # Find all annotations that are referenced | |
| 567 | referenced_annotations = set() | |
| 568 | ||
| 569 | # Check ordering for annotation references | |
| 570 | for item in self.order_by: | |
| 571 | if isinstance(item, str): | |
| 572 | if item.startswith("-"): | |
| 573 | item = item[1:] | |
| 574 | if item in self.annotations: | |
| 575 | referenced_annotations.add(item) | |
| 576 | elif hasattr(item, "get_source_expressions"): | |
| 577 | # For OrderBy expressions, check their source expressions | |
| 578 | self._find_annotation_refs_in_expr(item, referenced_annotations) | |
| 579 | ||
| 580 | # Check where clause for annotation references | |
| 581 | if self.where: | |
| 582 | self._find_annotation_refs_in_expr(self.where, referenced_annotations) | |
| 583 | ||
| 584 | # Check annotations for references to other annotations | |
| 585 | for alias, annotation in self.annotations.items(): | |
| 586 | self._find_annotation_refs_in_expr(annotation, referenced_annotations) | |
| 587 | ||
| 588 | # Remove unreferenced annotations | |
| 589 | unreferenced = set(self.annotations.keys()) - referenced_annotations | |
| 590 | for alias in unreferenced: | |
| 591 | del self.annotations[alias] | |
| 592 | if alias in self.annotation_select: | |
| 593 | del self.annotation_select[alias] | |
| 594 | ||
| 595 | def _find_annotation_refs_in_expr(self, expr, referenced_annotations): | |
| 596 | """ | |
| 597 | Recursively find annotation references in an expression. | |
| 598 | """ | |
| 599 | if hasattr(expr, "get_source_expressions"): | |
| 600 | for source_expr in expr.get_source_expressions(): | |
| 601 | self._find_annotation_refs_in_expr(source_expr, referenced_annotations) | |
| 602 | elif hasattr(expr, "refs_annotation"): | |
| 603 | # Check if the expression references an annotation | |
| 604 | for alias in self.annotations: | |
| 605 | if expr.refs_annotation(alias): | |
| 606 | referenced_annotations.add(alias) | |
| 607 | ||
| 556 | 608 | def has_filters(self): |
| 557 | 609 | return self.where |
| 558 | 610 |
| Test Name | Status |
|---|---|
test_unreferenced_aggregate_annotation_pruned (aggregation.tests.AggregateAnnotationPruningTests) | Fail |
Subquery annotations must be included in the GROUP BY if they use | Fail |
test_non_aggregate_annotation_pruned (aggregation.tests.AggregateAnnotationPruningTests) | Pass |
test_unused_aliased_aggregate_pruned (aggregation.tests.AggregateAnnotationPruningTests) | Pass |
test_referenced_aggregate_annotation_kept (aggregation.tests.AggregateAnnotationPruningTests) | Pass |
test_add_implementation (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_alias (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_in_order_by (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_join_transform (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_multi_join (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_over_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_over_complex_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_aggregate_transform (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_after_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_compound_expression (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_expression (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_group_by (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_integer (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_not_in_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_passed_another_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_unset (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_unsupported_by_count (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_date_from_database (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_date_from_python (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_datetime_from_database (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_datetime_from_python (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_decimal_from_database (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_decimal_from_python (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_duration_from_database (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_duration_from_python (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_time_from_database (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_using_time_from_python (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_default_zero (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_exists_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_exists_multivalued_outeref (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_expressions (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_filter_exists (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_nested_subquery_outerref (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_order_by_not_selected_annotation_values (aggregation.tests.AggregateTestCase) | Pass |
Random() is not included in the GROUP BY when used for ordering. | Pass |
Subquery annotations are excluded from the GROUP BY if they are | Pass |
test_aggregation_subquery_annotation_exists (aggregation.tests.AggregateTestCase) | Pass |
test_aggregation_subquery_annotation_related_field (aggregation.tests.AggregateTestCase) | Pass |
Subquery annotations and external aliases are excluded from the GROUP | Pass |
test_aggregation_subquery_annotation_values_collision (aggregation.tests.AggregateTestCase) | Pass |
test_alias_sql_injection (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_basic (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_defer (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_defer_select_related (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_m2m (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_ordering (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_over_annotate (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_values (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_values_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_annotate_values_list (aggregation.tests.AggregateTestCase) | Pass |
test_annotated_aggregate_over_annotated_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_annotation_expressions (aggregation.tests.AggregateTestCase) | Pass |
test_arguments_must_be_expressions (aggregation.tests.AggregateTestCase) | Pass |
test_avg_decimal_field (aggregation.tests.AggregateTestCase) | Pass |
test_avg_duration_field (aggregation.tests.AggregateTestCase) | Pass |
test_backwards_m2m_annotate (aggregation.tests.AggregateTestCase) | Pass |
test_coalesced_empty_result_set (aggregation.tests.AggregateTestCase) | Pass |
test_combine_different_types (aggregation.tests.AggregateTestCase) | Pass |
test_complex_aggregations_require_kwarg (aggregation.tests.AggregateTestCase) | Pass |
test_complex_values_aggregation (aggregation.tests.AggregateTestCase) | Pass |
test_count (aggregation.tests.AggregateTestCase) | Pass |
test_count_distinct_expression (aggregation.tests.AggregateTestCase) | Pass |
test_count_star (aggregation.tests.AggregateTestCase) | Pass |
.dates() returns a distinct set of dates when applied to a | Pass |
test_decimal_max_digits_has_no_effect (aggregation.tests.AggregateTestCase) | Pass |
test_distinct_on_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_empty_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_empty_result_optimization (aggregation.tests.AggregateTestCase) | Pass |
test_even_more_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_exists_extra_where_with_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_exists_none_with_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_expression_on_aggregation (aggregation.tests.AggregateTestCase) | Pass |
test_filter_aggregate (aggregation.tests.AggregateTestCase) | Pass |
Filtering against an aggregate requires the usage of the HAVING clause. | Pass |
test_filtering (aggregation.tests.AggregateTestCase) | Pass |
test_fkey_aggregate (aggregation.tests.AggregateTestCase) | Pass |
Exists annotations are included in the GROUP BY if they are | Pass |
Subquery annotations are included in the GROUP BY if they are | Pass |
An annotation included in values() before an aggregate should be | Pass |
test_more_aggregation (aggregation.tests.AggregateTestCase) | Pass |
test_multi_arg_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_multiple_aggregates (aggregation.tests.AggregateTestCase) | Pass |
An annotation not included in values() before an aggregate should be | Pass |
test_nonaggregate_aggregation_throws (aggregation.tests.AggregateTestCase) | Pass |
test_nonfield_annotation (aggregation.tests.AggregateTestCase) | Pass |
test_order_of_precedence (aggregation.tests.AggregateTestCase) | Pass |
test_related_aggregate (aggregation.tests.AggregateTestCase) | Pass |
test_reverse_fkey_annotate (aggregation.tests.AggregateTestCase) | Pass |
test_single_aggregate (aggregation.tests.AggregateTestCase) | Pass |
Sum on a distinct() QuerySet should aggregate only the distinct items. | Pass |
test_sum_duration_field (aggregation.tests.AggregateTestCase) | Pass |
Subqueries do not needlessly contain ORDER BY, SELECT FOR UPDATE or | Pass |
Aggregation over sliced queryset works correctly. | Pass |
Doing exclude() on a foreign model after annotate() doesn't crash. | Pass |
test_values_aggregation (aggregation.tests.AggregateTestCase) | Pass |
test_values_annotation_with_expression (aggregation.tests.AggregateTestCase) | Pass |
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