我正在尝试在 django 中使用 graphQL 查询。基本上我有两个应用程序,一个是我的“api”应用程序,其中包含进行查询所需的所有内容,另一个是“前端”应用程序,我从中调用 api 来使用这些查询。
我可以使用 GraphQL 视图在其中输入查询,并且效果很好,但每当我尝试进行查询时,我都会得到:“OrderedDict([('users', None)])”
我在 GraphQl 视图中查询的结果 https://i.stack.imgur.com/1Jzsb.png
代码:
在“api”我的模式.py:
import graphene
import graphql_jwt
from graphene import relay, ObjectType, AbstractType, List, String, Field,InputObjectType
from graphene_django import DjangoObjectType
from graphene_django.filter import DjangoFilterConnectionField
from datetime import date, datetime
from django.contrib.auth.models import User
from django.contrib.auth import get_user_model
....
class Query(graphene.ObjectType):
me = graphene.Field(UserType)
users = graphene.List(UserType)
profile = relay.Node.Field(ProfileNode)
all_profiles = DjangoFilterConnectionField(ProfileNode)
def resolve_users(self, info):
### Returns all users ###
user = info.context.user
if user.is_anonymous:
raise Exception('Not logged!')
if not user.is_superuser:
raise Exception('premission denied')
return User.objects.all()
def resolve_me(self, info):
### Returns logged user ###
user = info.context.user
if user.is_anonymous:
raise Exception('Not logged!')
return user
def resolve_all_profiles(self, info, **kwargs):
### Returns all profiles ###
return Profile.objects.all()
.....
def execute(my_query):
schema = graphene.Schema(query=Query)
return schema.execute(my_query)
And the views.py在我的应用程序前端调用应用程序“api”:
from django.shortcuts import render
import graphene
from api import schema
from django.contrib.auth import authenticate
def accueil(request):
if request.user.is_authenticated:
check = "I am logged"
else:
check = "I am not logged"
result = schema.execute("""query {
users {
id
username
}
}""")
return render(request, 'frontend/accueil.html', {'result' : result.data, 'check' : check})
模板:
<h1>OTC</h1>
<p> the users are : {{result}}</p>
<br/>
<p>{{check}}</p>
<a href="{%url 'login' %}">login</a>
<a href="{%url 'logout' %}">logout</a>
最后:
网页结果 https://i.stack.imgur.com/XUvvv.png
以及控制台中的错误:
An error occurred while resolving field Query.users
Traceback (most recent call last):
File "/home/victor/myenv/lib/python3.5/site-packages/graphql/execution/executor.py", line 311, in resolve_or_error
return executor.execute(resolve_fn, source, info, **args)
File "/home/victor/myenv/lib/python3.5/site-packages/graphql/execution/executors/sync.py", line 7, in execute
return fn(*args, **kwargs)
File "/home/victor/poc2/poc2/api/schema.py", line 67, in resolve_users
user = info.context.user
AttributeError: 'NoneType' object has no attribute 'user'
Traceback (most recent call last):
File "/home/victor/myenv/lib/python3.5/site-packages/graphql/execution/executor.py", line 330, in complete_value_catching_error
exe_context, return_type, field_asts, info, result)
File "/home/victor/myenv/lib/python3.5/site-packages/graphql/execution/executor.py", line 383, in complete_value
raise GraphQLLocatedError(field_asts, original_error=result)
graphql.error.located_error.GraphQLLocatedError: 'NoneType' object has no attribute 'user'