如何在“字段”元组中包含外键字段以使其显示在 Django Admin 的详细视图页面上

Question

型号： 我有一个这样的模型

class TestModel1(models.Model):
    bookingid = models.ForeignKey(paymenttable)            // foreign key
    name = models.CharField(max_length=100, null=False, db_index=True)

    // I want this to be displayed in both the list view and detail view
    @property
    def custom_field(self):
       return self.bookingid.username  

Admin.py

class MyAdmin(ReadOnlyAdminFields,admin.ModelAdmin):

      // this works and i get custom_field in list view
      list_display = ('custom_field', 'name') 
      readonly = ('custom_field', 'name')

      // this dosent work and gives error  
      fields = ('custom_field', 'name')   

错误：未知字段 custom_field。检查 MyAdmin 类的字段/字段集/排除属性

Answer 1

你有一个小错字。 readonly 应该是 readonly_fields

小技巧，您可以将带有 short_description 属性的自定义标签添加到您的 custom_field 方法中。你可以这样做......

# models.py

class TestModel1(models.Model):
    bookingid = models.ForeignKey(paymenttable)
    name = models.CharField(max_length=100, null=False, db_index=True)

    @property
    def custom_field(self):
       return self.bookingid.username

    custom_field.short_description = "User"

然后您可以像这样在管理类的字段列表中使用它...

# admin.py

class MyAdmin(ReadOnlyAdminFields,admin.ModelAdmin):
      list_display = ('custom_field', 'name') 
      readonly_fields= ('custom_field', 'name')
      fields = ('custom_field', 'name')