我有一个运行djongo( mongoDB )的Django GraphQL应用( graphene_django )。
当我尝试列出所有Twitter查询(带有GraphiQL 的)时,它返回空数据:
我的查询:
query {
allTwitterQueries {
id,
keyword
}
}
返回:
{
"data": {
"allTwitterQueries": null
}
}
这是我的Django文件:
无标题/schema.py
import untitled.api.schema
import graphene
from graphene_django.debug import DjangoDebug
class Query(
untitled.api.schema.Query,
graphene.ObjectType,
):
debug = graphene.Field(DjangoDebug, name="_debug")
schema = graphene.Schema(query=Query)
untitled / api / models.py
from django.db import models
from django.contrib.auth.models import User
class TwitterQuery(models.Model):
user_key = models.ForeignKey(User, related_name="created_by", on_delete=models.CASCADE, default=0)
keyword = models.TextField(default="null")
active = models.BooleanField(null=True)
created_at = models.BigIntegerField(default=0)
updated_at = models.BigIntegerField(default=0)
count = models.IntegerField(default=0)
def __str__(self):
return self.keyword
无标题/api/schema.py
import graphene
from graphene_django.types import DjangoObjectType
from untitled.api.models import TwitterQuery
class TwitterQueryType(DjangoObjectType):
class Meta:
model = TwitterQuery
class Query(object):
twitter_query = graphene.Field(TwitterQueryType, id=graphene.Int(), keyword=graphene.String(), active=graphene.Boolean())
all_twitter_queries = graphene.List(TwitterQueryType)
def fetch_twitter_queries(self, context):
return TwitterQuery.objects.all()
def fetch_twitter_query(self, context, user_id=None, active=None):
if user_id is not None:
return TwitterQuery.objects.get(user_id=user_id)
if active is not None:
return TwitterQuery.objects.get(active=active)
return None
我的mongoDB实例中有一个项目:
{"_id":{"$oid":"5df20401d4e39b1e89223b15"},
"id":{"$numberInt":"1"},
"user_key_id":{"$numberInt":"1"},
"keyword":"greve",
"active":true,
"created_at":{"$numberLong":"1575846000000"},
"updated_at":{"$numberLong":"1575846000000"},
"count":{"$numberInt":"0"}}
答案 0 :(得分:1)
乍一看,我认为您需要重命名您的resolves函数。 Graphene使用一种模式来查找resole_x()
,其中“ x”是模式中的字段名称(https://docs.graphene-python.org/en/latest/types/objecttypes/#resolvers)。另外,您也可以将resolver=your_function
传递给graphene.Field()
,其中your_function
可以是任何函数。
Graphene还提供了一个默认的解析器,如果它是对象或字典,它将尝试从父级访问该属性。由于您的情况并非如此(我们位于查询的根目录中),您将得到null
的回复,因为无法解决任何问题。
我认为您需要对此进行调整
class Query(object):
twitter_query = graphene.Field(TwitterQueryType, id=graphene.Int(), keyword=graphene.String(), active=graphene.Boolean())
all_twitter_queries = graphene.List(TwitterQueryType)
def resolve_all_twitter_queries(self, context):
return TwitterQuery.objects.all()
def resolve_twitter_query(self, context, user_id=None, active=None):
if user_id is not None:
return TwitterQuery.objects.get(user_id=user_id)
if active is not None:
return TwitterQuery.objects.get(active=active)
return None
应该做到这一点。
您应该在文档中再看一遍。即使还不是很完美,它也改善了一点安静。 希望对您有帮助。