GraphQL Schema Design Case Studies

1. Introduction

Schema design is a critical aspect of any GraphQL API. A well-structured schema can enhance the performance and maintainability of your application. In this lesson, we will explore two detailed case studies showcasing effective schema design.

2. Case Study 1: E-Commerce

type User {
    id: ID!
    name: String!
    email: String!
    orders: [Order]
}

type Product {
    id: ID!
    name: String!
    price: Float!
    category: Category
}

type Category {
    id: ID!
    name: String!
    products: [Product]
}

type Order {
    id: ID!
    user: User!
    products: [Product]!
    total: Float!
}

type Query {
    users: [User]
    products: [Product]
    categories: [Category]
    orders: [Order]
}
            

3. Case Study 2: Social Media

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

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

type Comment {
    id: ID!
    post: Post!
    author: User!
    content: String!
}

type Query {
    users: [User]
    posts: [Post]
    comments(postId: ID!): [Comment]
}
            

4. Best Practices

• Design your schema based on your application's needs.
• Use descriptive names for types and fields.
• Keep your schema normalized to avoid redundancy.
• Consider using enums for fixed sets of values.
• Implement pagination for large data sets.

5. FAQ