sqlalchemy.sql.schema.UniqueConstraint

class documentation

class UniqueConstraint(ColumnCollectionConstraint): (source)

View In Hierarchy

A table-level UNIQUE constraint. Defines a single column or composite UNIQUE constraint. For a no-frills, single column constraint, adding ``unique=True`` to the ``Column`` definition is a shorthand equivalent for an unnamed, single column UniqueConstraint.

Class Variable __visit_name__ Undocumented

Inherited from ColumnCollectionConstraint:

Method __contains__ Undocumented
Method __init__ :param \*columns: A sequence of column names or Column objects.
Method __iter__ Undocumented
Method __len__ Undocumented
Method contains_column Return True if this constraint contains the given column.
Method copy Undocumented
Class Variable columns A :class:`_expression.ColumnCollection` representing the set of columns for this constraint.
Method _copy Undocumented
Method _set_parent Associate with this SchemaEvent's parent object.

Inherited from ColumnCollectionMixin (via ColumnCollectionConstraint):

Property c Undocumented
Method _check_attach Undocumented
Method _col_expressions Undocumented
Method _set_parent_with_dispatch Undocumented
Class Variable _allow_multiple_tables Undocumented
Instance Variable _cols_wo_table Undocumented
Instance Variable _column_flag Undocumented
Instance Variable _columns Undocumented
Instance Variable _pending_colargs Undocumented

Inherited from Constraint (via ColumnCollectionConstraint, ColumnCollectionMixin):

Instance Variable comment Undocumented
Instance Variable deferrable Undocumented
Instance Variable info Info dictionary associated with the object, allowing user-defined data to be associated with this :class:`.SchemaItem`.
Instance Variable initially Undocumented
Instance Variable name Undocumented
Instance Variable parent Undocumented
Property table Undocumented
Method _should_create_for_compiler Undocumented
Class Variable _creation_order Undocumented
Instance Variable _create_rule Undocumented
Instance Variable _type_bound Undocumented

Inherited from DialectKWArgs (via ColumnCollectionConstraint, ColumnCollectionMixin, Constraint):

Class Method argument_for Add a new kind of dialect-specific keyword argument for this class.
Class Variable __slots__ Undocumented
Property dialect_kwargs A collection of keyword arguments specified as dialect-specific options to this construct.
Property dialect_options A collection of keyword arguments specified as dialect-specific options to this construct.
Property kwargs A synonym for :attr:`.DialectKWArgs.dialect_kwargs`.
Method _kw_reg_for_dialect_cls Undocumented
Method _validate_dialect_kwargs Undocumented
Class Variable _dialect_kwargs_traverse_internals Undocumented
Class Variable _kw_registry Undocumented

Inherited from HasConditionalDDL (via ColumnCollectionConstraint, ColumnCollectionMixin, Constraint, DialectKWArgs):

Method ddl_if apply a conditional DDL rule to this schema item.
Instance Variable _ddl_if Undocumented

Inherited from SchemaItem (via ColumnCollectionConstraint, ColumnCollectionMixin, Constraint, DialectKWArgs, HasConditionalDDL):

Method __repr__ Undocumented
Class Variable create_drop_stringify_dialect Undocumented
Method _init_items Initialize the list of child items for this SchemaItem.
Method _schema_item_copy Undocumented
Class Variable _use_schema_map Undocumented

Inherited from SchemaEventTarget (via ColumnCollectionConstraint, ColumnCollectionMixin, Constraint, DialectKWArgs, HasConditionalDDL, SchemaItem):

Class Variable dispatch Undocumented

Inherited from Visitable (via ColumnCollectionConstraint, ColumnCollectionMixin, Constraint, DialectKWArgs, HasConditionalDDL, SchemaItem, SchemaEventTarget, EventTarget):

Method __class_getitem__ Undocumented
Method __init_subclass__ Undocumented
Class Method _generate_compiler_dispatch Undocumented
Method _compiler_dispatch Undocumented
Class Variable _original_compiler_dispatch Undocumented