CODEWITHSUNDEEP
mongodbgraphqlmongoenginegraphene-python
BFR92
BFR92

Reputation: 23

Querying mongoDB via graphene with arguments

Good morning,

I would like to be able to make a GraphQL request that "ask" MongoDB the following question : 

query 
{ user(firstname:"Pierre}
    { lastname}
}

from mongoengine import Document
from mongoengine.fields import StringField
class User(Document):
    meta = {'collection': 'user'}
    firstname = StringField(required=True)
    lastname = StringField(required=True)

from graphene_mongo import MongoengineObjectType
from graphene import connect
from models import User as UserModel

connect(db="graphene-mongo-example",host="127.0.0.1:27017",alias="default")

class User(MongoengineObjectType):
    class Meta:
        model = UserModel

class Query(graphene.ObjectType):

    users = graphene.List(User)

    def resolve_users(self, info,firstname):
        return list(UserModel.objects.all(firstname))

schema = graphene.Schema(query=Query)

I do not succeed in having only the user with the given firstname.. Could you please help me ?

Many thanks

B.

Upvotes: 1

Views: 1784

Answers (2)

BFR92
BFR92

Reputation: 23

The models.py did not change. Here is the code I have wrote to answer the problem I had : 

import graphene
from graphene.relay import Node
from flask import Flask
from flask_graphql import GraphQLView
from graphene_mongo import MongoengineObjectType
from models import User as UserModel
from mongoengine import connect


connect(db="graphene-mongo-example",host="127.0.0.1:27017",alias="default")


class User(MongoengineObjectType):
    class Meta:
        model = UserModel
        filter_fields = ['fisrt_name']
        interfaces = (Node,)

class Query(graphene.ObjectType):
    user_by_name = graphene.Field(User,gName=graphene.String())

    def resolve_user_by_name(parent,info,gName):
       return UserModel.objects.get(first_name=gName)

schema = graphene.Schema(query=Query)

#==================================================================

app = Flask(__name__)
app.debug = True
app.add_url_rule(
    "/graphql", view_func=GraphQLView.as_view("graphql", schema=schema, graphiql=True)
  )

if __name__ == "__main__":
    app.run()

I am then able to query with GraphQL this kind of request :

query { 
userByName(gName:"Pierre")
  {lastName 
   firstName
  }
}

Upvotes: 1

Ravi
Ravi

Reputation: 28

query { user(firstname:"Pierre} { lastname}}

if above is your graphql query then it should be

query

{ user(firstname:"Pierre"){ lastname} }

Next read this parameter firstname in your code and fetch the document accordingly

Upvotes: 1

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