python - 在 Django Admin 中过滤一对一字段的结果

Question

首先，这是我试图限制的模型：

问题类：

class Question(models.Model):
title = models.CharField(
    max_length = 200,
    verbose_name = "Question title")
description = models.TextField(
    verbose_name = "Question description")
block = models.ForeignKey(
    to=Block,
    null=True,
    on_delete=models.SET_NULL,
    verbose_name='Subject part to which this question belongs')
timestamp = models.DateTimeField(
    auto_now_add=True,
    verbose_name='Date at which the question was added')

包含我要限制的问题的一对一字段的海报类：

class Poster(models.Model):
title = models.CharField(
    max_length = 200,
    verbose_name = "The poster's title")
description = models.TextField(
    verbose_name = "The poster's description")
authors = models.CharField(
    max_length = 200,
    verbose_name = "Authors' names")
image = models.ImageField(
    upload_to = 'images',
    verbose_name = 'Poster image')
block = models.ForeignKey(
    to = Block,
    null = True,
    on_delete = models.SET_NULL,
    verbose_name = 'The subject part to which the poster belongs')
associated_question = models.OneToOneField(
    Question,
    null=True,
    blank=True,
    on_delete=models.SET_NULL,
    unique=True,
    verbose_name='Question associated to this poster')

我要做的是限制“关联问题”字段在管理员中显示的选项。我的意思是，例如，如果我只想在管理员中显示时间戳超过特定限制的问题，我该怎么做？

非常感谢您提前。如果我错过了理解我的问题所必需的内容，请向我询问。如有必要，我很乐意提供更多信息。

标签： pythondjangodjango-models

Answer 1

如果您想在默认情况下限制管理员列表，您可以覆盖get_queryset和过滤查询集，如下所示：

编辑：要过滤associated_question下拉表单字段，您可以使用formfield_for_foreignkey

class PosterAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        qs = super(PosterAdmin, self).get_queryset(request)
        timestamp_limit = datetime.now() - datetime.timedelta(minutes=5)
        return qs.filter(associated_question__timestamp__gt=timestamp_limit)

    def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
        if db_field.name == "associated_question":
            timestamp_limit = datetime.now() - datetime.timedelta(minutes=5)
            kwargs["queryset"] = Question.objects.filter(timestamp__gt=timestamp_limit)
        return super(PosterAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

限制问题列表

class QuestionAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        qs = super(QuestionAdmin, self).get_queryset(request)
        timestamp_limit = datetime.now() - datetime.timedelta(minutes=5)
        return qs.filter(timestamp__gt=timestamp_limit)