19majkel94/type-graphql
Type Graphql
Type-graphql is a framework for building GraphQL servers that uses TypeScript classes as the single source of truth for schema definitions and types. It provides a schema generator and a resolver framework that allows developers to define queries and mutations using class-based controllers and decorators.
The project focuses on a schema-first approach where TypeScript classes and metadata reflection are used to automatically derive GraphQL schemas. It incorporates a dependency injection container to manage the instantiation and lifecycle of resolver classes.
The system includes a middleware layer for authorization and access control, utilizing guards to restrict access to specific resolvers. It also provides mechanisms for input validation to ensure API requests meet required type and format specifications.
Features
- GraphQL Schema Definitions - Generates typed GraphQL schemas using TypeScript classes and decorators as the single source of truth.
- GraphQL Frameworks - Provides a comprehensive framework for building GraphQL queries and mutations using class-based controllers.
- Resolver Implementations - Implements logic to fetch and modify data by mapping GraphQL fields to TypeScript class methods.
- GraphQL Integrations - Provides a framework for mapping GraphQL queries and mutations to data-fetching logic via structured resolver classes.
- Resolver Mappings - Maps GraphQL queries and mutations to specific TypeScript class methods using metadata reflection.
- Schema Generation - Derives GraphQL schemas by scanning TypeScript class metadata and property decorators at runtime.
- Reflection-Based Type Mapping - Uses reflect-metadata to extract type information from classes for automatic GraphQL schema mapping.
- Schema-First Class Definitions - Uses TypeScript classes as the single source of truth for both API definitions and runtime logic.
- GraphQL APIs - Provides a framework for building GraphQL servers where schemas and types are synchronized automatically using TypeScript.
- GraphQL Schema Generation - Automatically generates GraphQL schemas and types from TypeScript classes using decorators.
- Schema-First Development Frameworks - Implements a schema-first methodology where TypeScript classes define the GraphQL API.
- Access Control Guards - Implements guard mechanisms to block or permit access to specific resolvers based on authorization rules.
- GraphQL Authorizers - Manages endpoint permissions by implementing authorization guards within the GraphQL resolver layer.
- Authorization Middleware - Implements a middleware layer to execute authorization and validation logic before resolver execution.
- Authorization Interceptors - Ships a system of authorization interceptors to restrict access to resolvers via guards.
- Dependency Injection Containers - Provides a dependency injection container to manage the instantiation and lifecycle of resolver classes.
- GraphQL Input Validations - Implements input validation for GraphQL requests to ensure they meet required type and format specifications.
- Type Safety and Schema Construction - Create GraphQL schema and resolvers with TypeScript using decorators.
