apollo-server – Tarik Billa

Stitching secure subscriptions using makeRemoteExecutableSchema

April 11, 2024 by Tarik

I have one working solution: the idea is to not create one instance of SubscriptionClient for the whole application. Instead, I’m creating the clients for each connection to the proxy server: server.start({ port: 4000, subscriptions: { onConnect: (connectionParams, websocket, context) => { return { subscriptionClients: { messageService: new SubscriptionClient(process.env.MESSAGE_SERVICE_SUBSCRIPTION_URL, { connectionParams, reconnect: true, }, ws) … Read more

How to parse GraphQL request string into an object

April 4, 2024 by Tarik

You can use graphql-tag : const gql = require(‘graphql-tag’); const query = ` { qQueryEndpoint { id } } `; const obj = gql` ${query} `; console.log(‘operation’, obj.definitions[0].operation); console.log(‘name’, obj.definitions[0].selectionSet.selections[0].name.value); Prints out : operation query name qQueryEndpoint And with your mutation : operation mutation name saveSomething

What is the difference between apollo server and express-graphql

January 9, 2024 by Tarik

Below is the now deleted section from the apollo-server README comparing apollo-server to express-graphql. Note that some of these arguments do not apply anymore e.g. express-grapqhl is now written in TypeScript. Hence the removal of this section from the README. One observation is that apollo-server is too bloated, and is slowly showing a lack of … Read more

How to load a .graphql file using `apollo-server`?

September 22, 2023 by Tarik

If you define your type definitions inside a .graphql file, you can read it in one of several ways: 1.) Read the file yourself: const { readFileSync } = require(‘fs’) // we must convert the file Buffer to a UTF-8 string const typeDefs = readFileSync(require.resolve(‘./type-defs.graphql’)).toString(‘utf-8’) 2.) Utilize a library like graphql-tools to do it for … Read more

How do I handle deletes in react-apollo

September 10, 2023 by Tarik

I am not sure it is good practise style but here is how I handle the deletion of an item in react-apollo with updateQueries: import { graphql, compose } from ‘react-apollo’; import gql from ‘graphql-tag’; import update from ‘react-addons-update’; import _ from ‘underscore’; const SceneCollectionsQuery = gql ` query SceneCollections { myScenes: selectedScenes (excludeOwner: false, … Read more

Why does a GraphQL query return null?

September 6, 2023 by Tarik

There’s two common reasons your field or fields are resolving to null: 1) returning data in the wrong shape inside your resolver; and 2) not using Promises correctly. Note: if you’re seeing the following error: Cannot return null for non-nullable field the underlying issue is that your field is returning null. You can still follow … Read more

Apollo/GraphQL field type for object with dynamic keys

May 23, 2023 by Tarik

GraphQL relies on both the server and the client knowing ahead of time what fields are available available for each type. In some cases, the client can discover those fields (via introspection), but for the server, they always need to be known ahead of time. So to somehow dynamically generate those fields based on the … Read more

Why am I getting a “Cannot return null for non-nullable field” error when doing a mutation? [duplicate]

May 8, 2023 by Tarik

The biggest problem with your resolver is that in any number of scenarios, instead of returning a User object, you return a string. Your schema specifies that createAccount can return a User or null (if it was User!, it would be non-nullable and then null would not be a valid type either). When you return … Read more

How do I add a description to a field in “GraphQL schema language”

January 31, 2023 by Tarik

If you’re using GraphQL.js version 0.7.0 or above, you can simply add a comment directly before the field, type, or argument you want to describe. For example: # A type that describes the user type User { # The user’s username, should be typed in the login field. username: String! # The user’s password. password: … Read more