需要向图形QL视图提供一个架构

Question

我正在按照本教程将 Graphql 与 Django 集成，当我在本地机器上点击 graphql URL 时，我根据该教程执行了所有操作

http://localhost:8000/graphql

我得到以下错误

断言错误在 /graphql

需要向GraphQLView提供架构。

请求方法：GET请求URL:http://localhost:8000/graphqlDjango版本：1.11.1异常类型：断言错误异常值：
需要向GraphQLView提供架构。异常位置：/home/psingh/Projects/django_graphql/env/local/lib/python2.7/site-packages/graphene_django/views。初始化中的py，第84行Python可执行文件：/home/psingh/Projects/django_graphql/env/bin/Python-Python版本：2.7.6 Python-Pathon路径：
['/home/psingh/Projects/django_graphql/Projects'，'/home/psingh/Products/djang o_graph ql/env/lib/python2.7'，'-home/psingh/Projects/djang o_ graph ql/env/lib/python2.7/plat-x86_64-linux-gnu'，'/home/psingh/Projects/djiang o_graphql/env/lib/python2.7/lib-tk'，'/home/psingh/Projects/psingh/Projects/djang o graph ql/env/lib/python2.7/lib old'，'/home/psingh/Projects/django_graphql/env/lib/python2.7/lib-dynload'，'/usr/lib/python2.7'，'/usr/lib/python2.7/plat-x86_64-linux-gnu'，'-usr/lib/python2.7/lib-tk'，'/home/psingh/Projects/django_graphql/env/local/lib/python27/site packages'，'-home/psingh/Projects/django.graphql/env/lib/ppython2.7/site packes']服务器时间：2017年5月12日星期五12:18:31 0000

在settings.py中

GRAPHENE = {
'SCHEMA': 'project.schema.schema'

}

项目

import graphene
import mainapp.schema 
class Query(mainapp.schema.Query, graphene.ObjectType):
  # This class will inherit from multiple Queries
  # as we begin to add more apps to our project
  pass

schema = graphene.Schema(query=Query)

应用程序

import graphene
from graphene_django.types import DjangoObjectType
from cookbook.ingredients.models import Category, Ingredient

class CategoryType(DjangoObjectType):
  class Meta:
     model = Category


 class IngredientType(DjangoObjectType):
   class Meta:
      model = Ingredient


 class Query(graphene.AbstractType):
   all_categories = graphene.List(CategoryType)
   all_ingredients = graphene.List(IngredientType)

   def resolve_all_categories(self, args, context, info):
     return Category.objects.all()

  def resolve_all_ingredients(self, args, context, info):
     # We can easily optimize query count in the resolve method
     return Ingredient.objects.select_related('category').all()

project_urls.py

from django.conf.urls import include, url
from django.contrib import admin

from graphene_django.views import GraphQLView
import schema

urlpatterns = [
   url(r'^admin/', admin.site.urls),
   url(r'^graphql', GraphQLView.as_view(graphiql=True)),
   url(r'^', include('mainapp.urls')),    

]

任何帮助都会很好。我不熟悉编码。提前谢谢。

Answer 1

settings.py文件下的INSTALLED_APPS中是否添加了“graphene_django”？查看这里-https://docs . graphene-python . org/projects/django/en/latest/tutorial-plain/# update-settings

Answer 2

如果你不想在settings.py中添加GRAPHENE变量，那么你可以在中传递方案参数GraphQLView.as_view（）方法调用

   from onlineshop_project.scheme import schema
   urlpatterns = [
       url(r'^admin/', admin.site.urls),
       url(r'^graphql', GraphQLView.as_view(graphiql=True, schema=schema)),
   ]

您可以查看文档。

Answer 3

您必须将模式添加到< code>settings.py中，如下所示:

GRAPHENE={'Schema'：'cookbook.schema.schema'}

您需要2个schema.py文件，一个在项目的根级别，一个在应用程序文件夹中。