当数据库中已经存在数据时,我想在管理表单上显示一个嵌入的映射。我有以下代码:
型号.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。我得到一个错误:
'AddressAdmin.fieldsets[1][1]['fields']' refers to field 'address_2_html' that is missing from the form.
我尝试过的另一件事是对"fieldsets"使用"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"嵌入了一个静态地图,这很酷,但还不够酷。
类似(来自内存):
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'
由于get_fieldsets()方法允许访问模型对象Address,因此通过重写get_fields()解决了问题。
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