python - 如何在 django ModelAdmin 字段集中调用模型方法？

Question

当数据库中已经存在数据时，我想在管理表单上显示嵌入式地图。我有以下代码：

模型.py

class Address(models.Model):
    address = models.CharField()

    def address_2_html(self):
        if self.address:
            # Return html for an embedded map using the entered address.
            return embedded_map_html
        else:
            return ''
    address_2_html.allow_tags = True

管理员.py

class AddressAdmin(admin.ModelAdmin):
    fieldsets = [(label, {'fields': ['address','address_2_html']}),]

这行不通。我收到一个错误：

'AddressAdmin.fieldsets[1][1]['fields']' refers to field 'address_2_html' that is missing from the form.

我尝试的另一件事是使用'fieldsets'的'description'选项，但是，在AddressAdmin的范围内无法访问'address_2_html'。我确实成功地使用“描述”嵌入了静态地图，这很酷但还不够酷。

Answer 1

像那样（从记忆中）：

class AddressAdmin(admin.ModelAdmin):
    fieldsets = [(label, {'fields': ['address','address_2_html']}),]
    readonly_fields = ['address_2_html']

    def address_2_html(self, obj):
        return obj.address_2_html()
    address_2_html.allow_tags = True
    address_2_html.short_description = 'Address display'

Answer 2

通过覆盖 get_fieldsets() 解决了问题，因为 get_fieldsets() 方法允许访问模型对象地址。

def get_fieldsets(self, request, obj=None):
    fs = [
        (self.label,  {'fields': ['address',]}),
        ('Map', {'fields': [], # required by django admin
                'description':obj.address_2_html(),
         }),
    ]
    return fs