需要向 GraphQLView 提供 Schema
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【中文标题】需要向 GraphQLView 提供 Schema【英文标题】:A Schema is required to be provided to GraphQLView 【发布时间】:2017-10-11 18:44:49 【问题描述】:我正在关注this 教程将 Graphql 与 Django 集成,当我在本地机器上点击 graphql URL 时,我按照该教程做了所有事情
http://localhost:8000/graphql
我收到以下错误
/graphql 处的断言错误
。
请求方法:GET 请求网址:http://localhost:8000/graphql Django 版本:1.11.1 异常类型:AssertionError 异常值: 。 异常位置:/home/psingh/Projects/django_graphql/env/local/lib/python2.7/site-packages/graphene_django/views.py in init,第 84 行 Python 可执行文件:/home/psingh/Projects/django_graphql/env/bin/python Python版本:2.7.6 Python 路径: ['/home/psingh/Projects/django_graphql/project', '/home/psingh/Projects/django_graphql/env/lib/python2.7', '/home/psingh/Projects/django_graphql/env/lib/python2.7/plat-x86_64-linux-gnu', '/home/psingh/Projects/django_graphql/env/lib/python2.7/lib-tk', '/home/psingh/Projects/django_graphql/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/python2.7/site-packages', '/home/psingh/Projects/django_graphql/env/lib/python2.7/site-packages'] 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> schema.py
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)
app>schema.py
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')),
]
任何帮助都会很棒。我是编码方面的新手。 提前致谢。
【问题讨论】:
【参考方案1】:您必须将架构添加到您的 settings.py
,如 here 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 app 文件夹中。
【讨论】:
我已将其添加为 GRAPHENE = 'SCHEMA': 'project.schema.schema' 我已经用所有必需的代码编辑了问题。【参考方案2】:如果您不想在settings.py
中添加GRAPHENE
变量,则可以在GraphQLView.as_view()
方法调用中传递scheme
参数
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the documentation。
【讨论】:
【参考方案3】:您是否在 settings.py 文件下的 INSTALLED_APPS 中添加了“graphene_django”? 在这里查看 - https://docs.graphene-python.org/projects/django/en/latest/tutorial-plain/#update-settings
【讨论】:
您的答案似乎与接受的答案没有什么不同。此外,这个问题是在 3 年前提出并回答的。回答时请务必查看原始问题的日期。请阅读How to Answer。以上是关于需要向 GraphQLView 提供 Schema的主要内容,如果未能解决你的问题,请参考以下文章
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