I am new to graphql. I am using express-graphql to generate graphql queries on REST APIs for petSore schema. I am able to get the result for GET APIs using graphql Queries but I am unable to get response for POST/PUT APIs using Mutations. ) To create pet I am using mutation as,
mutation {
addPet(body: {id: "111", name: "doggie", photoUrls:["http://localhost:3000/pics/doggie"]}) {
name,
id
}
}
While running this query on localhost:3000/graphql I am getting error on backend(nodejs error) as,
uncaughtException: First argument must be a string or Buffer...
It would be great if someone help me to understand what I am doing wrong here...
Node.js code :
'use strict';
var graphqlHTTP = require('express-graphql');
var graphQLSchema = require('swagger-to-graphql');
var pathToSwaggerSchema = require('./schema.json');
module.exports = function(server) {
var router = server.loopback.Router();
router.get('/', server.loopback.status());
graphQLSchema(pathToSwaggerSchema).then(schema => {
server.use('/graphql', graphqlHTTP((req) => {
return {
schema: schema,
context: {
GQLProxyBaseUrl: 'http://localhost:3000/api/v2/',
},
graphiql: true,
};
}));
}).catch(e => {
throw e;
});
server.use(router);
};
The process which I have to follow is:
- Converting swagger to graphql schema.
- Provide generated graphql schema as an input for express-graphql.
- GQLProxyBaseUrl is backend url for all petstore REST APIs.
