related.py 文件源码

def add_lazy_relation(cls, field, relation, operation):
    warnings.warn(
        "add_lazy_relation() has been superseded by lazy_related_operation() "
        "and related methods on the Apps class.",
        RemovedInDjango20Warning, stacklevel=2)
    # Rearrange args for new Apps.lazy_model_operation

    def function(local, related, field):
        return operation(field, related, local)

    lazy_related_operation(function, cls, relation, field=field)