django-filter自定义过滤器未获取查询集

Question

首先，如果你能提供最佳解决方案，我是Django过滤器的初学者，我会很高兴听到它。

我需要通过ForignKeys过滤QuerySet＆＃39;领域。确切地说是author和worker。

Model.py

class Object(models.Model):
    class Meta:
        abstract = True

    author = models.ForeignKey('Users.User', on_delete=models.CASCADE)


class Task(Object):
    priority_choices = (
        ('high', 'Высокий'),
        ('middle', 'Стандартный'),
        ('low', 'Низкий'),
    )

    status_choices = (
        ('open', 'Открыта'),
        ('done', 'Выполнена'),
        ('close', 'Закрыта'),
    )

    name = models.CharField(max_length=140)
    description = models.TextField()
    end_date = models.DateField()
    worker = models.ForeignKey('Users.User', on_delete=models.CASCADE, related_name='worker_set')
    priority = models.CharField(max_length=15, choices=priority_choices)
    status = models.CharField(max_length=15, choices=status_choices)

Filters.py

class TaskFilter(filters.FilterSet):
    my_tasks = filters.BooleanFilter(
        label="Мои задачи",
        method='my_task_filter',
        widget=forms.CheckboxInput()
    )
    tasks_for_me = filters.BooleanFilter(
        label="Задачи для меня",
        method='tasks_for_me_filter',
        widget=forms.CheckboxInput()
    )
    commented_tasks = filters.BooleanFilter(
        label="Я комментировал",
        method='commented_tasks_filter',
        widget=forms.CheckboxInput())

    class Meta:
        model = Task
        fields = ['my_tasks', 'tasks_for_me', 'commented_tasks']

    def my_task_filter(self, queryset, name, value):
        print(1, self, queryset, name, value)
        return queryset.filter(author_id=self.request.user.id)

    def tasks_for_me_filter(self, queryset, name, value):
        print(2, self, queryset, name, value)
        return queryset.filter(worker_id=self.request.user.id)

    def commented_tasks_filter(self, queryset, name, value):
        print(3, self, queryset, name, value)
        return queryset.filter(comment__author_id=self.request.user.id)

根据 filters.py 中的印刷品，我得到：

1 <TaskManager.filters.TaskFilter object at 0x7f87290dea90> <QuerySet [<Task: Task object>, <Task: Task object>, <Task: Task object>]> my_tasks False
2 <TaskManager.filters.TaskFilter object at 0x7f87290dea90> <QuerySet []> tasks_for_me True
3 <TaskManager.filters.TaskFilter object at 0x7f87290dea90> <QuerySet []> commented_tasks False

所以我有两个问题：首先，为什么只有第一个自定义过滤器获得查询集？另外，如何使用三个单选按钮进行过滤，这只是返回需要查询集？

Answer 1

从查询集中可以清楚地看出，3个任务的作者为1。这也意味着您必须从用户1查询。因此my_task_filter返回3个结果。

对于tasks_for_me_filter，你得到的结果是0，因为没有工人有id 1.

要解决此问题，您需要以某种方式将user_id（您要检查的worker）传递给此查询集。也许使用请求参数。

虽然这是建议的答案 - 但这并不能解决问题。请查看以下评论​​以获取一些提示。