我正在尝试访问Django Admin中Tabular Inline中的外键字段。
尽管我付出了最大的努力,但似乎无法让它发挥作用。我目前的代码是:
class RankingInline(admin.TabularInline):
model = BestBuy.products.through
fields = ('product', 'account_type', 'rank')
readonly_fields = ('product', 'rank')
ordering = ('rank',)
extra = 0
def account_type(self, obj):
return obj.products.account_type
结果是:
'RankingInline.fields' refers to field 'account_type' that is missing from the form.
我也尝试过使用model__field方法,我用它作为:
fields = ('product', 'product__account_type', 'rank')
结果是:
'RankingInline.fields' refers to field 'product__account_type' that is missing from the form.
模型定义如下:
class Product(BaseModel):
account_type = models.CharField(choices=ACCOUNT_TYPE_OPTIONS, verbose_name='Account Type', max_length=1, default='P')
class Ranking(models.Model):
product = models.ForeignKey(Product)
bestbuy = models.ForeignKey(BestBuy)
rank = models.IntegerField(null=True, blank = True)
class BestBuy(BaseModel):
products = models.ManyToManyField(Product, through='Ranking')
class BaseModel(models.Model):
title = models.CharField(max_length = TODO_LENGTH)
slug = models.CharField(max_length = TODO_LENGTH, help_text = """The slug is a url encoded version of your title and is used to create the web address""")
created_date = models.DateTimeField(auto_now_add = True)
last_updated = models.DateTimeField(auto_now = True)
我做错了什么?
答案 0 :(得分:4)
我认为您要寻找的是嵌套内联,因为您想在RankInline中将“Product”扩展为内联。目前Django没有内置这样的功能。这个问题是相关的:Nested inlines in the Django admin?
您还可以查看Django DOC中的“使用多对多中介模型”部分。这可能有用。
实际上,Django会在内联产品字段条目旁边显示一个绿色的“+”按钮,您可以使用该按钮创建新产品以分配给BestBuy的当前条目。这可能是您使用的替代方案。
答案 1 :(得分:0)
您的新字段account_type
应在ModelAdmin
(即RankingAdmin)中定义,而不是TabularInline
(即排名在线)。它应该只从TabularInline访问。
答案 2 :(得分:0)
您只需将method-field添加到readonly_fields:
readonly_fields = ('product', 'rank', 'account_type')