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Learning Topics

This roadmap covers the following topics:

✅ Stop Thinking in Queries (Think in Fragments)

• ✅ Fragments as Composition Units
  • ✅ Fragment Colocation Principle
  • ✅ Composing Fragment Trees
  • ⚪ Type Safety Guarantees
• ✅ Data Masking Architecture
  • ✅ Parent-Child Data Boundaries
  • ⚪ Enforced Component Contracts
  • ⚪ Breaking the Masking Rules
• ✅ Apollo brain vs Relay brain

✅ Identity and Cache Truth

• ✅ Global Object Identification
  • ⚪ Node Interface Requirements
  • ⚪ ID Encoding Strategies
  • ⚪ Identity Across Boundaries
• ✅ Normalization and Cache Mechanics
  • ⚪ Flat Record Storage
  • ⚪ Automatic Update Propagation
  • ⚪ When Identity Breaks

✅ Reading Data the Relay Way

• ✅ Fragment Consumption Patterns
  • ✅ useFragment for Components
  • ✅ useLazyLoadQuery for Routes
  • ⚪ usePreloadedQuery Pattern
• ✅ Refetchable Fragments
  • ⚪ useRefetchableFragment Hook
  • ⚪ Pagination Refetch Patterns
  • ⚪ Colocation vs Prop Drilling

✅ Writing Data Without Chaos

• ✅ Mutation Strategies
  • ⚪ Declarative Mutation Configs
  • ⚪ Imperative Store Updaters
  • ⚪ Reading and Writing Store
• ✅ Optimistic Updates Done Right
  • ⚪ Optimistic Response Shapes
  • ⚪ Rollback Mechanics
  • ⚪ Server Authority Principle

✅ Lists, Scale, and Reality

• ✅ Connection Specification
  • ⚪ Edges and Nodes Structure
  • ⚪ PageInfo Contract
  • ⚪ Cursor Pagination Logic
• ✅ Pagination Invariants
  • ⚪ usePaginationFragment Hook
  • ⚪ Connection Stability
  • ⚪ Why Relay Hates Arrays

✅ Advanced Patterns

• ✅ Suspense and Concurrent Rendering
  • ✅ Suspense Boundaries Placement
  • ⚪ Transitions with useTransition
  • ⚪ Streaming and Incremental Delivery
• ✅ Error Handling Architecture
  • ⚪ Query Error Boundaries
  • ⚪ Mutation Error Handling
• ✅ Performance Mental Models
  • ⚪ Subscription and Re-render Rules
  • ⚪ Store Subscription Optimization
  • ⚪ Request Deduplication