API Architecture Comparison

Let’s explore the differences between GraphQL and REST APIs and when to use each.

REST Example

Traditional REST endpoint structure:

GET /api/users/123
GET /api/users/123/posts
GET /api/users/123/followers

Response:

{
  "id": 123,
  "name": "John Doe",
  "email": "john@example.com"
}

GraphQL Example

Single endpoint with flexible queries:

query {
  user(id: "123") {
    name
    email
    posts {
      title
      comments {
        text
      }
    }
    followers {
      name
    }
  }
}

Key Differences

  1. Data Fetching

    • REST: Multiple endpoints
    • GraphQL: Single endpoint

  2. Over/Under-fetching

    • REST: Common issue
    • GraphQL: Client specifies needs

  3. Versioning

    • REST: Explicit versions
    • GraphQL: Continuous evolution

When to Use Each

Choose REST when:

  • Simple CRUD operations
  • Caching is priority
  • Limited client requirements

Choose GraphQL when:

  • Complex data relationships
  • Multiple client platforms
  • Bandwidth optimization needed

Stay tuned for more API design patterns!