json-yup

A simple utility for converting a JSON schema into Yup schema.

Setup

npm install -S json-yup

import createValidationSchema from 'json-yup';

API

createValidationSchema(schema, options);

Arguments

Argument	Type	Description
schema	Object	A valid JSON schema conforming to JSON schema specifications.
customValidationFields	Object	Custom Yup mappings for schema properties

Options

Property	Type	Description
blackList	Array	A list of fields to omit from the schema.
customValidationFields	Object	Custom Yup mappings for schema properties
validationTypes	Object	Custom Yup mappings for schema types.

Returns

Yup validation object

Usage

// Valid JSON Schema
const jsonSchema = {
  "type": "object",
  "required": [
    "first_name"
  ],
  "properties": {
    "create_at": {
      "type": "string"
    },
    "first_name": {
      "type": "string"
    },
    "age": {
      "type": "number",
      "min": 1,
      "max": 200
    }
  }
};

// Build Yup Schema
const validationSchema = createValidationSchema(jsonSchema, {
  blackList: [
    'create_at'
  ],
  validationTypes: {
    string: yup.string().nullable()
  },
  customValidationFields: {
    first_name: yup.string().test(
      'isWilly',
      'Oops! You\'re not Willy',
      value => value === 'Willy'
    )
  }
});

// Check validity
validationSchema.isValid({
  first_name: 'Willy',
  age: 24
})