Leto - GraphQL Server

A complete implementation of the official GraphQL specification in the Dart programming language.

Inspired by graphql-js, async-graphql and type-graphql. First version of the codebase was forked from angel-graphql. Many tests and utilities (DataLoader, printSchema) were ported from graphql-js.

If your prefer to read the documentation in a web page, you can try the documentation page built with Docusaurus.

Table of Contents

• Quickstart
  • Install
  • Create a GraphQLSchema
    • Using Code Generation
  • Start the server
  • Test the server
• Examples
  • Code Generator example
  • Fullstack Dart Chat
    • Chat functionalities
  • Server example
  • Room Signals
  • CI \& CD Dart Server
• Packages
• Web integrations
  • Server integrations
    • Shelf
  • Web UI Explorers
    • GraphiQL
    • Playground
    • Altair
  • Clients
• Documentation
• GraphQL Schema Types
  • Scalars
  • Enums
  • Objects
    • Interfaces
  • Inputs and Input Objects
    • InputObject.isOneOf
    • InputObject.fromJson
  • Unions
    • Freezed Unions
  • Wrapping Types
  • Non-Nullable
  • Lists
  • Abstract Types
    • resolveType
    • Generics
    • isTypeOf
    • __typename
    • Serialize and validate
  • Advanced Types
    • Provided Types
    • Cyclic Types
    • Custom Scalars
    • Generic Types
• Resolvers
  • Queries and Mutations
  • Subscriptions
    • Examples
  • Request Contexts
    • Ctx
    • ObjectExecutionCtx
    • ExecutionCtx
    • RequestCtx
• Validation
  • Schema Validation
  • Document Validation
  • Query Complexity
  • Skip validation with Persisted Queries
  • Input Validation
• Miscellaneous
  • GraphQLResult
  • ScopedMap
    • ScopedHolder
    • ScopedRef
    • Example usage
  • Error Handling
    • Exceptions and GraphQLError
    • Result types
    • Error lists and interfaces
  • Hot Reload and Cycles
• Solving the N+1 problem
  • LookAhead (Eager loading)
  • DataLoader (Batching)
  • Combining LookAhead with DataLoader
• Extensions
  • Persisted Queries
  • Apollo Tracing
  • Response Cache
  • Logging Extension
  • Map Error Extension
  • Custom Extensions
• Directives
  • KeyDirective
  • ValidaDirective
• Attachments
  • AttachmentWithValidation
  • ToDirectiveValue
    • KeyAttachment
    • ValidaAttachment
  • Usage
    • AttachFn for code generation
• Utilities
  • buildSchema
  • printSchema
  • extendSchema
  • introspectionQuery
  • mergeSchemas
  • schemaFromJson
• Contributing
  • Scripts
    • collect_examples.dart
    • generate_docusaurus.dart