如何基于返回布尔值的模型类上方法的结果来过滤查询集？ [英] How to filter a queryset based on the result of a method on the model class that returns a boolean?

问题描述

作为我的一个模型类的成员函数，我有一个 is_visible（self，user）方法，该方法返回布尔值。按照定义，它将请求用户（Django User 模型）作为输入。

As a member function of one of my model classes, I have an is_visible(self, user) method that returns a boolean. As defined, it takes the requesting user (Django User model) as input.

我希望能够基于对此方法的响应来过滤查询集。

I would like to be able to filter querysets based on the response to this method. How can I use this function as a queryset filter?

对于上下文，这是我的 is_visible 实现：

For context, here is my is_visible implementation:

    def is_visible(self, user):
        if self.status.status_internal == "open":
            return True
        if self.owner == user:
            return true

        participations = Participation.objects.filter(event__id=self.id, participant__id=user.id)
        if len(participations) > 0:
            return True

        if self.status.status_internal == "invite":
            return True

        return False

推荐答案

您不能使用python函数来过滤查询集。您必须复制此代码并使用 Q个对象。

You can't use python function to filter queryset. You have to "duplicate" this code and filter your objects using Q objects.

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