Prisma SDL Generator
Generate GraphQL Schema Definition Language (SDL) files and corresponding resolvers for Prisma models. This generator creates complete GraphQL schemas with type definitions and resolver implementations using a schema-first approach.
Overview
The Prisma SDL Generator creates comprehensive GraphQL schema files using Schema Definition Language (SDL). Unlike the Nexus generator which uses code-first approach, this generator follows the schema-first GraphQL pattern:
- SDL type definitions for all Prisma models
- Complete resolver implementations with TypeScript support
- Input types and enums in SDL format
- Query and mutation operations for CRUD functionality
- Type-safe resolver functions with proper signatures
Configuration Options
typescript
Generated File Structure
code
Generation Patterns
1. Type Definition Generation (typeDefs.ts)
graphql
2. Query Type Generation
graphql
3. Mutation Type Generation
graphql
4. Resolver Implementation (resolvers.ts)
typescript
Real-World Example
Sample Prisma Schema
prisma
AI Prompt
code
Generated Schema Setup
src/graphql/typeDefs.ts:
typescript
src/graphql/resolvers.ts:
typescript
Schema Composition and Server Setup
Apollo Server Setup
typescript
Context Setup
typescript
Advanced Features
Custom Scalar Types
typescript
Field-Level Authorization
typescript
Input Validation
typescript
Type Safety Benefits
Generated Types for Resolvers
The SDL generator creates comprehensive TypeScript types that ensure:
typescript
Testing
Unit Testing Resolvers
typescript
Integration Testing with GraphQL
typescript
Performance Optimization
DataLoader Integration
typescript
Best Practices
Schema Organization
- Modular approach - Separate type definitions and resolvers by domain
- Consistent naming - Follow GraphQL conventions for operations
- Documentation - Include descriptions for all types and fields
- Input validation - Always validate user inputs
- Error handling - Provide meaningful error messages
Performance
- Use DataLoaders - Prevent N+1 query problems
- Implement pagination - Handle large datasets properly
- Field selection - Only fetch requested data
- Query complexity analysis - Limit expensive operations
Security
- Authentication - Verify user identity
- Authorization - Check permissions in resolvers
- Input sanitization - Validate and sanitize all inputs
- Rate limiting - Prevent abuse
Next Steps
- Learn about Prisma Resolver Types Generator for enhanced type safety
- Explore the Prisma Nexus Generator for code-first development
- Check out GraphQL best practices for production deployment
- View complete examples on GitHub