Designing GraphQL APIs

GraphQL provides a powerful way to build flexible APIs. Let's explore how to design and implement GraphQL APIs effectively.

Schema Design

type User {
  id: ID!
  name: String!
  email: String!
  posts: [Post!]!
}

type Post {
  id: ID!
  title: String!
  content: String!
  author: User!
  comments: [Comment!]!
}

type Query {
  user(id: ID!): User
  posts: [Post!]!
}

type Mutation {
  createPost(input: CreatePostInput!): Post!
  updatePost(id: ID!, input: UpdatePostInput!): Post!
}

Best Practices

1. Use proper types
2. Implement pagination
3. Handle errors gracefully
4. Use fragments for reusability

Implementation Tips

• Use DataLoader for batching
• Implement proper caching
• Handle authentication
• Monitor performance