GraphQL for React developers

Welcome to the GraphQL workshop for React developers! ☀️

In this workshop, we'll be building a Twitter clone using GraphQL and React. We'll be using GraphQL Yoga for the GraphQL server and Apollo Client for the React app.

• 🌱 Learn GraphQL basics
• 🥑 Build GraphQL queries & mutations
• 🥝 Get familiar with the GraphQL client
• 🍇 Implement queries & mutations on the client
• 🔑 Access control & authorization
• 🎛 Production deployment

🔧 Setup

1. Get started by cloning this repo and installing the dependencies:

git clone https://github.com/glennreyes/react-graphql-workshop.git
cd react-graphql-workshop
pnpm install

2. Start the development servers:

pnpm dev

3. Open GraphiQL at http://localhost:4000/graphql and the React app at http://localhost:3000.

📚 Exercises

Learn GraphQL basics

• GraphiQL
• Schema
• Types
• Resolvers

Create a query hello that takes an argument name. Based on what the user inputs, return a greeting. For example, if the user inputs Glenn, return Hello Glenn!.

Useful links

• https://the-guild.dev/graphql/yoga-server/docs
• https://graphql.org/learn

Default types

• String
• Int
• Float
• Boolean
• ID

Schema definition example

type Person {
  id: ID! # Not nullable
  name: String # Nullable
  age: Int
  weight: Float
  isOnline: Boolean
  posts: [Post!]! # Not nullable (but empty list is fine)
}

type Post {
  id: ID!
  slug: String!
  text: String!
}

type Query {
  allPersons: [Person!]!
  personById(id: ID!): Person
  allPosts: [Post!]!
  postBySlug(slug: String!): Post
}

type Mutation {
  createPost(message: String!): Post!
}

Resolver function

(parent, args, context, info) => result;

Build GraphQL queries & mutations

Build queries

1. 💎 Implement allPosts query
2. 💎 Implement me query
3. 💎 Implement user query

Build mutations

1. 💎 Implement createPost mutation
2. 💎 Implement deletePost mutation
3. 💎 Implement updateUser mutation

Useful links

Query & mutation field:

• https://pothos-graphql.dev/docs/guide/queries-and-mutations
• https://pothos-graphql.dev/docs/api/schema-builder#queryfieldname-field
• https://pothos-graphql.dev/docs/api/schema-builder#mutationfieldname-field

Prisma

Make sure you're in the server directory:

pnpm prisma migrate reset --skip-generate # Reset database
pnpm prisma db push # Push prisma schema to database
pnpm prisma generate # Generate Prisma client
pnpm seed # Seed database with fake data

Get familiar with the GraphQL client

• https://github.com/apollographql/apollo-client-nextjs

Implement queries & mutations on the client

Queries

1. Implement query in user-avatar.tsx
2. Implement query in home-feed.tsx
3. Implement queries in profile-page.tsx
4. Implement query in edit-profile.tsx

Use useSuspenseQuery from @apollo/experimental-nextjs-app-support/ssr to fetch data on the server.

• https://github.com/apollographql/apollo-client-nextjs#in-ssr

Mutations

1. Implement mutation in create-post-form.tsx
2. Implement mutation in delete-post-dialog.tsx
3. Implement mutation in edit-profile.tsx

Use useMutation from @apollo/client

• https://www.apollographql.com/docs/react/data/mutations