utility_tags.py 文件源码

def render(self, context):
        if "." in self.manager_method:
            manager, method = self.manager_method.split(".")
        else:
            manager = "_default_manager"
            method = self.manager_method

        qs = getattr(
            getattr(self.model, manager),
            method,
            self.model._default_manager.none,
        )()
        if self.amount:
            amount = template.resolve_variable(self.amount, context)
            context[self.var_name] = qs[:amount]
        else:
            context[self.var_name] = qs
        return ""