class UniqueConstraint(ColumnCollectionConstraint):
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__ |
|
| Method | __iter__ |
Undocumented |
| Method | __len__ |
Undocumented |
| Method | _copy |
Undocumented |
| Method | _set_parent |
Associate with this SchemaEvent's parent object. |
| Method | contains_column |
Return True if this constraint contains the given column. |
| Method | copy |
Undocumented |
| Class Variable | columns |
A _expression.ColumnCollection representing the set of columns for this constraint. |
Inherited from ColumnCollectionMixin (via ColumnCollectionConstraint):
| Method | _check_attach |
Undocumented |
| Method | _col_expressions |
Undocumented |
| Class Variable | _allow_multiple_tables |
Undocumented |
| Instance Variable | _cols_wo_table |
Undocumented |
| Instance Variable | _column_flag |
Undocumented |
| Instance Variable | _pending_colargs |
Undocumented |
Inherited from Constraint (via ColumnCollectionConstraint):
| Instance Variable | _create_rule |
Undocumented |
| Instance Variable | _type_bound |
Undocumented |
| Instance Variable | deferrable |
Undocumented |
| Instance Variable | info |
Info dictionary associated with the object, allowing user-defined
data to be associated with this .SchemaItem. |
| Instance Variable | initially |
Undocumented |
| Instance Variable | name |
Undocumented |
| Instance Variable | parent |
Undocumented |
| Property | table |
Undocumented |
Inherited from DialectKWArgs (via ColumnCollectionConstraint, Constraint):
| Class Method | argument_for |
Add a new kind of dialect-specific keyword argument for this class. |
| Method | _kw_reg_for_dialect_cls |
Undocumented |
| Method | _validate_dialect_kwargs |
Undocumented |
| Class Variable | _dialect_kwargs_traverse_internals |
Undocumented |
| Class Variable | _kw_registry |
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 .DialectKWArgs.dialect_kwargs. |
Inherited from SchemaItem (via ColumnCollectionConstraint, Constraint):
| Method | __repr__ |
Undocumented |
| Method | _init_items |
Initialize the list of child items for this SchemaItem. |
| Method | _schema_item_copy |
Undocumented |
| Class Variable | _use_schema_map |
Undocumented |
| Class Variable | create_drop_stringify_dialect |
Undocumented |
Inherited from SchemaEventTarget (via ColumnCollectionConstraint, Constraint, SchemaItem):
| Method | _set_parent_with_dispatch |
Undocumented |
Inherited from Traversible (via ColumnCollectionConstraint, Constraint, SchemaItem):
| Method | get_children |
Return immediate child .visitors.Traversible elements of this .visitors.Traversible. |
| Method | __class_getitem__ |
Undocumented |