Class Count

django.db.models.aggregates.Count

Declaration

class Count(Aggregate)

Methods

▶ def __init__(self, expression, filter=None, **extra) override
source link
This method overrides django.db.models.aggregates.Aggregate.__init__.
▶ def convert_value(self, value, expression, connection) override
inherited doc Expressions provide their own converters because users have the option of manually specifying the output_field which may be a different type from the one the database returns.
source link
This method overrides django.db.models.expressions.BaseExpression.convert_value.

Inherited methods

Methods inherited from django.db.models.aggregates.Aggregate:
as_sql, default_alias, get_group_by_cols, get_source_expressions, get_source_fields, resolve_expression, set_source_expressions
Methods inherited from django.db.models.expressions.Func:
__repr__, copy
Methods inherited from django.db.models.expressions.SQLiteNumericMixin:
as_sqlite
Methods inherited from django.db.models.expressions.BaseExpression:
__eq__, __getstate__, __hash__, asc, conditional, contains_aggregate, contains_column_references, contains_over_clause, desc, field, flatten, get_db_converters, get_lookup, get_transform, identity, output_field, relabeled_clone, reverse_ordering, select_format
Methods inherited from django.db.models.expressions.Combinable:
__add__, __and__, __mod__, __mul__, __neg__, __or__, __pow__, __radd__, __rand__, __rmod__, __rmul__, __ror__, __rpow__, __rsub__, __rtruediv__, __sub__, __truediv__, bitand, bitleftshift, bitor, bitrightshift, bitxor

Reexports

Imported in django.db.models.sql.query.