co3.mappers package

class co3.mappers.ComposableMapper(schema)

Bases: Mapper, Generic

classmethod compose(outer=False, conversion=False, full=False)

Note

Comparing to ORM, this method would likely also still be needed, since it may not be explicitly clear how some JOINs should be handled up the inheritance chain (for components / sa.Relationships, it’s a little easier).

Parameters:

• outer – whether to use outer joins down the chain

• conversion – whether to return conversion joins or base primitives

• full – whether to return fully connected primitive and conversion table

join_attribute_relations(r1, r2)

Specific mechanism for joining attribute-based relations.

Return type:

TypeVar(C, bound= ComposableComponent)

join_collation_relations(r1, r2)

Specific mechanism for joining collation-based relations.

Return type:

TypeVar(C, bound= ComposableComponent)