Django多对多内联 - 如何显示通过模型引用的字段？

Question

我正在尝试在django Admin中自定义多个内联,但是我无法显示底层模型的字段.

这是一个简化的例子.也许你可以告诉我如何引用它们？

这是我的模特:

class Clown(models.Model):
    name = models.CharField(max_length=255)
    def edit_link(self):
        return ...

class Circus(models.Model):
    clowns = models.ManyToManyField(Clown, blank=True, through='WorkedAt')
    name = models.CharField(max_length=255)

class WorkedAt(models.Model):
    clown = models.ForeignKey(Clown)
    circus = models.ForeignKey(Circus)

和我的管理员:

class ClownInline(admin.TabularInline):
    model = WorkedAt
    fields = ['clown__name','clown__edit_link']


class CircusAdmin(admin.ModelAdmin):
    inlines = [
        ClownInline,
    ]
    exclude = ('clowns',)

但是我收到此错误:

Unknown field(s) (clown__name) specified for WorkedAt

(我在Django 1.6上)

更新: 为什么这不起作用.(通过模型添加计算字段.)

class Clown(models.Model):
    name = models.CharField(max_length=255)
    def edit_link(self):
        return ...

class Circus(models.Model):
    clowns = models.ManyToManyField(Clown, blank=True, through='WorkedAt')
    name = models.CharField(max_length=255)

class WorkedAt(models.Model):
    clown = models.ForeignKey(Clown)
    circus = models.ForeignKey(Circus)
    @property
    def edit_link(self):
        return self.clown.edit_link()

和我的管理员:

class ClownInline(admin.TabularInline):
    model = WorkedAt
    fields = ['edit_link']


class CircusAdmin(admin.ModelAdmin):
    inlines = [
        ClownInline,
    ]
    exclude = ('clowns',)

Answer 1

尝试这个。希望它能解决你的问题

class ClownInline(admin.TabularInline):
    model = WorkedAt
    fields = ['clown_name', 'clown_edit_link']
    readonly_fields = ['clown_name', 'clown_edit_link']

    def clown_name(self, instance):
        return instance.clown.name
    clown_name.short_description = 'clow name'

    def clown_edit_link(self, instance):
        url = reverse("admin:%s_%s_change" % (instance.clown._meta.app_label, instance.clown._meta.module_name), args=(instance.clown.pk,))
        return '<a href="%s">%s</a>' % (url, instance.clown.name)
    clown_edit_link.allow_tags = True


class CircusAdmin(admin.ModelAdmin):
    inlines = [
        ClownInline,
    ]
    exclude = ('clowns',)