json-schema-tools / transpiler

Transpile JSON Schema to Type aliases for many languages

JSON Schema Transpiler

Turn your JSON Schemas into types to be used in various languages.

Try Me

• Generate types for:
  • Golang
  • Typescript
  • Rust
  • Python
• handles cycle detection
• automatically determines references
• includes documentation annotations for easy documentation generation with native language tools.
• minimal dependencies (wip)
• Creates 1 type alias per 1 schema
• Autogenerated deterministic titles where missing
• Autoreferencer (removes duplication)
• Code is synchronous - no IO keeps it lean and fast
• Convert schema to types in browser too!

Getting Started

npm install @json-schema-tools/transpiler

const JsonSchemaTranspiler = require("@json-schema-tools/transpiler").default;

const mySchema = {
  "title": "PlowAnimals",
  "description": "an array of animals that are good at pulling things",
  "type": "array",
  "items": {
    "oneOf": [
      { "title": "Horse" },
      { "title": "Donkey" },
      { "title": "Elephant" },
    ]
  }
};

const transpiler = new JsonSchemaTranspiler(mySchema);

console.log(transpiler.toTypescript());
console.log(transpiler.toRust());
console.log(transpiler.to("go")); // same thing, different form/interface
console.log(transpiler.to("python")); // works with shorthand of the language aswell (py or python)

Testing

Generate a test case

npm run generateTest

outputs:

> @json-schema-tools/[email protected] generateTest /Users/zb/Code/json-schema-tools/transpiler
> tsc && node ./build/integration-tests/generator.js

? What is the name of the test schema? type-as-array
? Enter a url to a JSON Schema, or press enter to get an empty one? false
Detecting languages...
Found 4 languages: go, py, rs, ts


Writing files...
All done

Edit schema if necessary, and run npm test. Update expected results as needed.

Contributing

How to contribute, build and release are outlined in CONTRIBUTING.md, BUILDING.md and RELEASING.md respectively. Commits in this repository follow the CONVENTIONAL_COMMITS.md specification.