Package Exports

@anatine/zod-openapi
@anatine/zod-openapi/src/index.js
@anatine/zod-openapi/src/lib/zod-openapi.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@anatine/zod-openapi) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@anatine/zod-openapi

Converts a Zod schema to an OpenAPI SchemaObject as defined by openapi3-ts

Installation

Both openapi3-ts and zod are peer dependencies instead of dependant packages. While zod is necessary for operation, openapi3-ts is for type-casting.

npm install openapi3-ts zod @anatine/zod-openapi

Usage

Take any Zod schema and convert it to an OpenAPI JSON object

import { generateSchema } from '@anatine/zod-openapi';
const aZodSchema = z.object({
  uid: z.string().nonempty(),
  firstName: z.string().min(2),
  lastName: z.string().optional(),
  email: z.string().email(),
  phoneNumber: z.string().min(10).optional(),
})
const myOpenApiSchema = generateSchema(aZodSchema);
// ...

This will generate an OpenAPI schema for myOpenApiSchema

{
  "type": "object",
  "properties": {
    "uid": {
      "type": "string",
      "minLength": 1
    },
    "firstName": {
      "type": "string",
      "minLength": 2
    },
    "lastName": {
      "type": "string"
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "phoneNumber": {
      "type": "string",
      "minLength": 10
    }
  },
  "required": [
    "uid",
    "firstName",
    "email"
  ]
}

Extend a Zod schema with additional OpenAPI schema via a function wrapper

import { extendApi, generateSchema } from '@anatine/zod-openapi';
const aZodExtendedSchema = extendApi(
      z.object({
        uid: extendApi(z.string().nonempty(), {
          title: 'Unique ID',
          description: 'A UUID generated by the server',
        }),
        firstName: z.string().min(2),
        lastName: z.string().optional(),
        email: z.string().email(),
        phoneNumber: extendApi(z.string().min(10), {
          description: 'US Phone numbers only',
          example: '555-555-5555',
        }),
      }),
      {
        title: 'User',
        description: 'A user schema',
      }
    );
const myOpenApiSchema = generateSchema(aZodExtendedSchema);
// ...

... or via extension of the Zod schema:

import { extendApi, generateSchema, extendZodWithOpenApi } from '@anatine/zod-openapi';
import {z} from 'zod';

extendZodWithOpenApi(z);

const aZodExtendedSchema = 
      z.object({
        uid: z.string().nonempty().openapi({
          title: 'Unique ID',
          description: 'A UUID generated by the server',
        }),
        firstName: z.string().min(2),
        lastName: z.string().optional(),
        email: z.string().email(),
        phoneNumber: z.string().min(10).openapi({
          description: 'US Phone numbers only',
          example: '555-555-5555',
        }),
      }).openapi(
      {
        title: 'User',
        description: 'A user schema',
      }
    );
const myOpenApiSchema = generateSchema(aZodExtendedSchema);
// ...

This will generate an extended schema:

{
  "type": "object",
  "properties": {
    "uid": {
      "type": "string",
      "minLength": 1,
      "title": "Unique ID",
      "description": "A UUID generated by the server"
    },
    "firstName": {
      "type": "string",
      "minLength": 2
    },
    "lastName": {
      "type": "string"
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "phoneNumber": {
      "type": "string",
      "minLength": 10,
      "description": "US Phone numbers only",
      "example": "555-555-5555"
    }
  },
  "required": [
    "uid",
    "firstName",
    "email",
    "phoneNumber"
  ],
  "title": "User",
  "description": "A user schema"
}

Credits

express-zod-api
A great lib that provided some insights on dealing with various zod types.
zod-dto
Lib providing insights into using Zod with NestJS

This library is part of a nx monorepo @anatine/zod-plugins.