#graphql

Build content-driven sites with Contentful. Setup: 1. Define content models in Contentful. 2. GraphQL or REST API for content. 3. Rich text rendering with @contentful/rich-text-react-renderer. 4. Preview mode for editors. 5. Localization support. 6. Asset optimization and delivery. 7. Webhooks for build triggers. 8. TypeScript types from content models. Use with Next.js ISR for dynamic static sites.

Design scalable GraphQL schemas. Patterns: 1. Types for domain models. 2. Queries for reads, mutations for writes. 3. Input types for complex arguments. 4. Interfaces and unions for polymorphism. 5. Connection pattern for pagination. 6. DataLoader for N+1 prevention. 7. Directive for custom logic. 8. Federation for microservices. Use schema-first approach. Implement authorization at field level.

Implement Weaviate for semantic search. Features: 1. Schema definition for classes. 2. Automatic vectorization. 3. GraphQL API for queries. 4. Hybrid search (vector + keyword). 5. Cross-references between objects. 6. Generative search with LLMs. 7. Multi-tenancy support. 8. Modules for ML models. Use for knowledge graphs with semantic capabilities and implement question answering.

Design a GraphQL schema for a blog application. The schema should define types for Author, Post, and Comment. Include queries to fetch all posts, a single post by ID, and all posts by a specific author. Also, include mutations for creating a new comment.

Implement GraphQL with Apollo Client. Setup: 1. ApolloProvider with InMemoryCache. 2. useQuery hook for data fetching. 3. useMutation for data updates. 4. Optimistic UI responses. 5. Cache policies (cache-first, network-only). 6. Fragment composition for reusable fields. 7. Pagination with fetchMore. 8. Local state management. Use codegen for TypeScript types and implement error handling with Error Link.