Django ModelAdmin中的“ModelAdmin”可以显示实现表的其他字段吗？

Question

我无法让"list_display“从相关表中显示字段。

models.py

class product(models.Model):
    product_id = models.AutoField(primary_key=True)
    EAN = models.CharField(unique=True, editable=False, max_length=13)
    Product_name = models.CharField(max_length=50)

class price(models.Model):
    price_id = models.AutoField(primary_key=True)
    EAN = models.ForeignKey(product, to_field="EAN", on_delete=models.CASCADE)
    Vendor = models.ForeignKey(vendor, to_field="Vendor_name", on_delete=models.CASCADE)
    Qty = models.CharField(max_length=15)
    Price = models.DecimalField(max_digits=8, decimal_places=2, null=True)

    panels = [
        FieldPanel('EAN'),
        FieldPanel('Vendor'),
        FieldPanel('Qty'),
        FieldPanel('Price'),
    ]

hooks.py

class price_admin(ModelAdmin):
    model = pricelist
    menu_label = 'price'
    menu_icon = 'pilcrow'
    menu_order = 300
    add_to_settings_menu = False
    exclude_from_explorer = False
    list_display = ('EAN_id', 'Vendor_id', 'Price') # <-Here I have a problem
    list_filter = ('Vendor_id__Name',)
    search_fields = ('Vendor_id__Name', 'EAN_id__EAN')

我可以让"Vendor_id__Name"在"list_filter"和list_display，中工作，但是当我将"Vendor_id__Name"放到list_display，中时，我会得到以下错误：

AttributeError: Unable to lookup 'EAN_id__Product_name' on price or price_admin

那么，从相关表中显示字段(在我的例子中是Vendor_id__Name)的正确方法是什么？任何帮助都将是非常感谢的！

Answer 1

正如注意到的，您在相关的字段名中有一个错误。您可以使用的其他选项--方法字段或基本上--是列表显示确实接受的可调用的：

class price_admin(ModelAdmin):
    ...
    list_display = ('vendor_name', # other fields)

    def vendor_name(self, obj):
        return obj.EAN.Product_name
    vendor_name.short_description = 'Vendor name'