dokterbob

class LimitedAdminInlineMixin(object):
    """
    InlineAdmin mixin limiting the selection of related items according to
    criteria which can depend on the current parent object being edited.

    A typical use case would be selecting a subset of related items from
    other inlines, ie. images, to have some relation to other inlines.

    Use as follows::

patrys

class AbstractMixin(object):
    _classcache = {}

    @classmethod
    def contribute(cls):
        return {}

    @classmethod
    def construct(cls, *args, **kwargs):
        attrs = cls.contribute(*args, **kwargs)