# Graphql Apollo
This document provides comprehensive guidelines for graphql apollo development and best practices.
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## GraphQL Fundamentals
1. **Schema**
- Schema definition with SDL (Schema Definition Language)
- Implement proper schema definition with sdl (schema definition language)
- Follow best practices for optimal results
2. **Query,**
- Query, Mutation, and Subscription operations
- Implement proper query, mutation, and subscription operations
- Follow best practices for optimal results
3. **Scalar**
- Scalar types and custom scalars
- Implement proper scalar types and custom scalars
- Follow best practices for optimal results
4. **Object**
- Object types and interfaces
- Implement proper object types and interfaces
- Follow best practices for optimal results
5. **Input**
- Input types and enums
- Implement proper input types and enums
- Follow best practices for optimal results
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## Schema Design
6. **Schema-first**
- Schema-first vs code-first approaches
- Implement proper schema-first vs code-first approaches
- Follow best practices for optimal results
7. **Type**
- Type relationships and connections
- Implement proper type relationships and connections
- Follow best practices for optimal results
8. **Pagination**
- Pagination patterns (cursor-based, offset)
- Implement proper pagination patterns (cursor-based, offset)
- Follow best practices for optimal results
9. **Union**
- Union types for polymorphic data
- Implement proper union types for polymorphic data
- Follow best practices for optimal results
10. **Directive**
- Directive usage for schema enhancement
- Implement proper directive usage for schema enhancement
- Follow best practices for optimal results
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## Resolvers
11. **Resolver**
- Resolver function implementation
- Implement proper resolver function implementation
- Follow best practices for optimal results
12. **Context**
- Context object for request data
- Implement proper context object for request data
- Follow best practices for optimal results
13. **Parent-child**
- Parent-child resolver relationships
- Implement proper parent-child resolver relationships
- Follow best practices for optimal results
14. **Async**
- Async resolver patterns
- Implement proper async resolver patterns
- Follow best practices for optimal results
15. **Error**
- Error handling in resolvers
- Implement proper error handling in resolvers
- Follow best practices for optimal results
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## Apollo Server
16. **Server**
- Server setup and configuration
- Implement proper server setup and configuration
- Follow best practices for optimal results
17. **Middleware**
- Middleware integration
- Implement proper middleware integration
- Follow best practices for optimal results
18. **Plugin**
- Plugin system utilization
- Implement proper plugin system utilization
- Follow best practices for optimal results
19. **Schema**
- Schema stitching and federation
- Implement proper schema stitching and federation
- Follow best practices for optimal results
20. **Subscription**
- Subscription implementation with WebSockets
- Implement proper subscription implementation with websockets
- Follow best practices for optimal results
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## Data Sources
21. **REST**
- REST API integration with RESTDataSource
- Implement proper rest api integration with restdatasource
- Follow best practices for optimal results
22. **Database**
- Database integration patterns
- Implement proper database integration patterns
- Follow best practices for optimal results
23. **Caching**
- Caching strategies with DataLoader
- Implement proper caching strategies with dataloader
- Follow best practices for optimal results
24. **Batch**
- Batch loading for N+1 problem prevention
- Implement proper batch loading for n+1 problem prevention
- Follow best practices for optimal results
25. **Custom**
- Custom data source implementation
- Implement proper custom data source implementation
- Follow best practices for optimal results
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## Authentication & Authorization
26. **JWT**
- JWT token validation
- Implement proper jwt token validation
- Follow best practices for optimal results
27. **Context-based**
- Context-based authentication
- Implement proper context-based authentication
- Follow best practices for optimal results
28. **Field-level**
- Field-level authorization
- Implement proper field-level authorization
- Follow best practices for optimal results
29. **Role-based**
- Role-based access control
- Implement proper role-based access control
- Follow best practices for optimal results
30. **Schema**
- Schema directive authorization
- Implement proper schema directive authorization
- Follow best practices for optimal results
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## Apollo Client
31. **Client**
- Client setup and configuration
- Implement proper client setup and configuration
- Follow best practices for optimal results
32. **Query**
- Query execution with useQuery
- Implement proper query execution with usequery
- Follow best practices for optimal results
33. **Mutation**
- Mutation handling with useMutation
- Implement proper mutation handling with usemutation
- Follow best practices for optimal results
34. **Subscription**
- Subscription management
- Implement proper subscription management
- Follow best practices for optimal results
35. **Local**
- Local state management
- Implement proper local state management
- Follow best practices for optimal results
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## Caching
36. **Apollo**
- Apollo Client InMemoryCache
- Implement proper apollo client inmemorycache
- Follow best practices for optimal results
37. **Cache**
- Cache policies and fetch policies
- Implement proper cache policies and fetch policies
- Follow best practices for optimal results
38. **Cache**
- Cache updates after mutations
- Implement proper cache updates after mutations
- Follow best practices for optimal results
39. **Optimistic**
- Optimistic updates
- Implement proper optimistic updates
- Follow best practices for optimal results
40. **Cache**
- Cache persistence
- Implement proper cache persistence
- Follow best practices for optimal results
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## Error Handling
41. **GraphQL**
- GraphQL error formatting
- Implement proper graphql error formatting
- Follow best practices for optimal results
42. **Client-side**
- Client-side error handling
- Implement proper client-side error handling
- Follow best practices for optimal results
43. **Error**
- Error boundaries in React
- Implement proper error boundaries in react
- Follow best practices for optimal results
44. **Network**
- Network error recovery
- Implement proper network error recovery
- Follow best practices for optimal results
45. **Partial**
- Partial error responses
- Implement proper partial error responses
- Follow best practices for optimal results
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## Performance Optimization
46. **Query**
- Query optimization and analysis
- Implement proper query optimization and analysis
- Follow best practices for optimal results
47. **DataLoader**
- DataLoader for batch loading
- Implement proper dataloader for batch loading
- Follow best practices for optimal results
48. **Query**
- Query complexity analysis
- Implement proper query complexity analysis
- Follow best practices for optimal results
49. **Persisted**
- Persisted queries
- Implement proper persisted queries
- Follow best practices for optimal results
50. **Automatic**
- Automatic persisted queries (APQ)
- Implement proper automatic persisted queries (apq)
- Follow best practices for optimal results
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## Testing
51. **Schema**
- Schema testing with graphql-tools
- Implement proper schema testing with graphql-tools
- Follow best practices for optimal results
52. **Resolver**
- Resolver unit testing
- Implement proper resolver unit testing
- Follow best practices for optimal results
53. **Integration**
- Integration testing with test server
- Implement proper integration testing with test server
- Follow best practices for optimal results
54. **Client-side**
- Client-side testing with MockedProvider
- Implement proper client-side testing with mockedprovider
- Follow best practices for optimal results
55. **End-to-end**
- End-to-end testing
- Implement proper end-to-end testing
- Follow best practices for optimal results
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## Real-time Features
56. **Subscription**
- Subscription implementation
- Implement proper subscription implementation
- Follow best practices for optimal results
57. **WebSocket**
- WebSocket transport
- Implement proper websocket transport
- Follow best practices for optimal results
58. **Real-time**
- Real-time data synchronization
- Implement proper real-time data synchronization
- Follow best practices for optimal results
59. **Live**
- Live query alternatives
- Implement proper live query alternatives
- Follow best practices for optimal results
60. **Push**
- Push notification integration
- Implement proper push notification integration
- Follow best practices for optimal results
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## Development Tools
61. **GraphQL**
- GraphQL Playground for testing
- Implement proper graphql playground for testing
- Follow best practices for optimal results
62. **Apollo**
- Apollo Studio for monitoring
- Implement proper apollo studio for monitoring
- Follow best practices for optimal results
63. **Schema**
- Schema registry and versioning
- Implement proper schema registry and versioning
- Follow best practices for optimal results
64. **Performance**
- Performance monitoring
- Implement proper performance monitoring
- Follow best practices for optimal results
65. **Error**
- Error tracking and analytics
- Implement proper error tracking and analytics
- Follow best practices for optimal results
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## Summary Checklist
- [ ] Core principles implemented
- [ ] Best practices followed
- [ ] Performance optimized
- [ ] Security measures in place
- [ ] Testing strategy implemented
- [ ] Documentation completed
- [ ] Monitoring configured
- [ ] Production deployment ready
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Follow these comprehensive guidelines for successful graphql apollo implementation.
