fluquery 1.0.1

Powerful asynchronous state management, server-state utilities and data fetching for Flutter. Inspired by TanStack Query (React Query). Features automatic caching, background refetching, mutations, [...]

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

1.0.0 - 2024-12-25

Added

• Initial release of FluQuery

• Core Features:

  • useQuery hook for data fetching with automatic caching
  • useQuerySelect hook for data fetching with transformation
  • useMutation hook for create/update/delete operations
  • useInfiniteQuery hook for paginated/infinite scroll queries
  • useQueries hook for parallel queries
  • useQueryClient hook to access the QueryClient
  • useIsFetching hook to check fetching state
  • useIsMutating hook to check mutation state
  • useSimpleQuery hook for simplified queries

• Caching & Synchronization:

  • Automatic query caching with configurable stale times
  • Garbage collection for unused cache entries
  • Cache invalidation and refetching
  • Manual cache manipulation via setQueryData and getQueryData

• Background Refetching:

  • Refetch on window/tab focus (web and mobile)
  • Refetch on network reconnection
  • Refetch on widget mount
  • Configurable polling intervals

• Race Condition Handling:

  • Automatic cancellation of stale requests
  • Query cancellation via CancellationToken
  • cancelQueries method for manual cancellation

• Data Transformation:

  • select function for transforming query data
  • useQuerySelect hook for select + query in one

• Smooth Transitions:

  • keepPreviousData option for smooth UI transitions
  • isPreviousData property to detect stale data display

• Error Handling:

  • Automatic retry with exponential backoff
  • Configurable retry count and delay
  • Error state management

• Optimistic Updates:

  • onMutate callback for optimistic updates
  • onError callback for rollback
  • onSettled callback for cleanup
  • onSuccess callback for cache updates

• Widgets:

  • QueryClientProvider for dependency injection
  • QueryBuilder widget as an alternative to hooks

• Utilities:

  • QueryFocusManager for app lifecycle management
  • ConnectivityManager for network state
  • FluQueryLogger for debug logging

Example App

• Basic query example with loading/error states
• Mutation example with CRUD operations
• Infinite query example with pagination
• Dependent queries example
• Polling example with server time
• Optimistic updates example
• Race condition handling example (with 3 demos: Search, Filters, Cancellation)
• Advanced features example (with 3 demos: Select, Keep Previous Data, Comparison)

Backend

• Simple Dart backend for testing (run with dart run bin/server.dart)
• In-memory database with todos, posts, users, comments
• Configurable artificial delays for race condition demos