django.db.models.expressions.Expression

class documentation

class Expression(BaseExpression, Combinable):

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An expression that can be combined with other expressions.

Method	`__eq__`	Undocumented
Method	`__hash__`	Undocumented
Property	`identity`	Undocumented

Inherited from BaseExpression:

Static Method	`_convert_value_noop`	Undocumented
Method	`__getstate__`	Undocumented
Method	`__init__`	Undocumented
Method	`_parse_expressions`	Undocumented
Method	`_resolve_output_field`	Attempt to infer the output type of the expression. If the output fields of all source fields match then, simply infer the same type here. This isn't always correct, but it makes sense most of the time.
Method	`as_sql`	Responsible for returning a (sql, [params]) tuple to be included in the current query.
Method	`asc`	Undocumented
Method	`copy`	Undocumented
Method	`desc`	Undocumented
Method	`flatten`	Recursively yield this expression and all subexpressions, in depth-first order.
Method	`get_db_converters`	Undocumented
Method	`get_group_by_cols`	Undocumented
Method	`get_lookup`	Undocumented
Method	`get_source_expressions`	Undocumented
Method	`get_source_fields`	Return the underlying field types used by this aggregate.
Method	`get_transform`	Undocumented
Method	`relabeled_clone`	Undocumented
Method	`resolve_expression`	Provide the chance to do any preprocessing or validation before being added to the query.
Method	`reverse_ordering`	Undocumented
Method	`select_format`	Custom format for select clauses. For example, EXISTS expressions need to be wrapped in CASE WHEN on Oracle.
Method	`set_source_expressions`	Undocumented
Class Variable	`_output_field_resolved_to_none`	Undocumented
Class Variable	`filterable`	Undocumented
Class Variable	`is_summary`	Undocumented
Class Variable	`window_compatible`	Undocumented
Property	`_output_field_or_none`	Return the output field of this expression, or None if _resolve_output_field() didn't return an output type.
Property	`conditional`	Undocumented
Property	`contains_aggregate`	Undocumented
Property	`contains_column_references`	Undocumented
Property	`contains_over_clause`	Undocumented
Property	`convert_value`	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.
Property	`field`	Undocumented
Property	`output_field`	Return the output type of this expressions.

Inherited from Combinable:

Constant	`ADD`	Undocumented
Constant	`BITAND`	Undocumented
Constant	`BITLEFTSHIFT`	Undocumented
Constant	`BITOR`	Undocumented
Constant	`BITRIGHTSHIFT`	Undocumented
Constant	`BITXOR`	Undocumented
Constant	`DIV`	Undocumented
Constant	`MOD`	Undocumented
Constant	`MUL`	Undocumented
Constant	`POW`	Undocumented
Constant	`SUB`	Undocumented
Method	`__add__`	Undocumented
Method	`__and__`	Undocumented
Method	`__mod__`	Undocumented
Method	`__mul__`	Undocumented
Method	`__neg__`	Undocumented
Method	`__or__`	Undocumented
Method	`__pow__`	Undocumented
Method	`__radd__`	Undocumented
Method	`__rand__`	Undocumented
Method	`__rmod__`	Undocumented
Method	`__rmul__`	Undocumented
Method	`__ror__`	Undocumented
Method	`__rpow__`	Undocumented
Method	`__rsub__`	Undocumented
Method	`__rtruediv__`	Undocumented
Method	`__sub__`	Undocumented
Method	`__truediv__`	Undocumented
Method	`_combine`	Undocumented
Method	`bitand`	Undocumented
Method	`bitleftshift`	Undocumented
Method	`bitor`	Undocumented
Method	`bitrightshift`	Undocumented
Method	`bitxor`	Undocumented

def __eq__(self, other):

overridden in django.db.models.lookups.Lookup

Undocumented

def __hash__(self):

overridden in django.db.models.lookups.Lookup

Undocumented

@cached_property
identity =

overridden in django.db.models.lookups.Lookup

Undocumented