Django内联模型管理过滤器外部字段

Question

我有以下问题.

我有3个型号:

class Deal(models.Model):
    name = models.CharField(max_length=80)

class Site(models.Model):
    name = models.CharField(max_length=80)
    deal = models.ForeignKey(Deal)

class Picture(models.Model):
    title = models.CharField(max_length=80)
    deal = models.ForeignKey(Deal)
    site = models.ForeignKey(Site)

我想使用网站和图片内联管理模型进行交易管理:

class SiteInline(admin.StackedInline):
    model = Site
    extra = 1


class PictureInline(admin.StackedInline):
    model = Picture
    extra = 1


class DealAdmin(admin.ModelAdmin):
    inlines = [
        SiteInline,
        PictureInline,
    ]

我想要做的是当我选择Site in Picture admin时它只显示我属于我正在查看的当前交易的网站(如果我正在更新 - 不创建新的).

我希望这个在管理员工作,我花了很多时间搜索网页,但找不到任何有用的东西,请帮忙!

我试图这样做,但我不知道如何访问父模型实例来获取交易ID:

def formfield_for_foreignkey(self, db_field, request=None, **kwargs):

    if db_field.name == 'site':
        kwargs['queryset'] = Site.objects.filter(deal__id=1)

    return super(PictureInline, self).formfield_for_foreignkey(db_field, request=None, **kwargs)

Answer 1

Django：从 ModelAdmin 中访问模型实例？

class PictureInlineForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(PictureInlineForm, self).__init__(*args, **kwargs)
        self.fields['site'].queryset = Site.objects.filter(
            deal=self.instance.deal)

class PictureInline(admin.ModelAdmin):
    form = PictureInlineForm