options.py 文件源码

def get_path_to_parent(self, parent):
        """
        Return a list of PathInfos containing the path from the current
        model to the parent model, or an empty list if parent is not a
        parent of the current model.
        """
        if self.model is parent:
            return []
        # Skip the chain of proxy to the concrete proxied model.
        proxied_model = self.concrete_model
        path = []
        opts = self
        for int_model in self.get_base_chain(parent):
            if int_model is proxied_model:
                opts = int_model._meta
            else:
                final_field = opts.parents[int_model]
                targets = (final_field.remote_field.get_related_field(),)
                opts = int_model._meta
                path.append(PathInfo(final_field.model._meta, opts, targets, final_field, False, True))
        return path