Question

Django的新手，试图创建一个简单的API来为地图构建JSON，但却坚持使用外键。

我做了一个可怕的尝试，但到目前为止只是出现了一个错误：

 "error_message": "'unicode' object has no attribute 'all'"

Models.py：

from django.db import models

class HouseInformation(models.Model):
    house_name = models.CharField(max_length=200, unique=True)
    house_type = models.CharField(max_length=40)
    address = models.CharField(max_length=200)
    latitude = models.CharField(max_length=200)
    longitude = models.CharField(max_length=200)

    class Meta:
        ordering  = ['house_name']

    def __unicode__(self):
        return self.house_name + ', ' + self.house_type + ', ' + self.address

class InspectionReport(models.Model):
    house_name = models.ForeignKey(HouseInformation, to_field='house_name')
    pass_inspection = models.NullBooleanField()
    inspection_date = models.DateField(null=True, blank=True)
    inspection_violations = models.IntegerField(null=True, blank=True)
    file_name = models.CharField(max_length=40, default='none')

api.py：

from tastypie.resources import ModelResource
from tastypie import fields
from housing.models import HouseInformation, InspectionReport


class HouseAPI(ModelResource):
    # fields.ToManyField('APP.api.RelatedResource', 'related name')
    inspection_reports = fields.ToManyField('housing.api.InspectionAPI', 'house_name')

    class Meta:
        resource_name = 'house_inspections'
        queryset = HouseInformation.objects.all()

class InspectionAPI(ModelResource):
    house_information = fields.ToOneField(HouseAPI, 'house_name')

    class Meta:
        queryset = InspectionReport.objects.all()
        resource_name = 'inspection_reports'

urls.py：

from django.conf.urls import *
from housing.api import HouseAPI
from housing import views

housing_api = HouseAPI()

urlpatterns = patterns('',
        url(r'^$', views.index, name='index'),
        (r'^api/', include(housing_api.urls)),
)

更新

测试网址：http://localhost:8080/housing/api/house_inspections/?format=json

完全回溯：

{＆＃34; error_message＆＃34;：＆＃34;＆＃39; unicode＆＃39;对象没有属性＆＃39; all＆＃39;＆＃34;，
＆＃34;追溯＆＃34;：＆＃34;追溯（最近一次呼叫最后一次）：\ n \ n文件 \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/resources.py \＆＃34 ;, 第201行，在wrapper \ n response = callback（request，* args， ** kwargs）\ n \ n File \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/resources.py \＆＃34;，第432行，在dispatch_list \ n中返回self.dispatch（＆＃39; list＆＃39;，request， ** kwargs）\ n \ n File \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/resources.py \＆＃34;，第464行，在dispatch \ n response = method（request，** kwargs）\ n \ n 文件 \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/resources.py \＆＃34 ;, 第1299行，在get_list \ n bundles.append中（self.full_dehydrate（bundle， for_list = True））\ n \ n文件 \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/resources.py \＆＃34 ;, 第854行，在full_dehydrate \ n bundle.data [field_name] = field_object.dehydrate（bundle，for_list = for_list）\ n \ n文件 \＆＃34; /Users/twitch/Projects/project_python/lib/python2.7/site-packages/tastypie/fields.py \＆＃34 ;, 第819行，脱水\ n为m2m in the_m2ms.all（）：\ n \ nAttributeError：＆＃39; unicode＆＃39;对象没有属性＆＃39;所有＆＃39; \ n＆＃34; }

使用Tasty Pie的Django简单API

0 个答案: