ajv-2019.md

Tried importing from ajv/dist/2019, only to hit the error module not found.

This works:

$ npm i ajv-dist

And the given example from json-schema.org now throws the correct error:

const Ajv = require("ajv-dist/dist/ajv2019.min.js");
const ajv = new Ajv();

const schema = {
  type: "object",

  properties: {
    name: { type: "string" },
    credit_card: { type: "number" },
    billing_address: { type: "string" },
  },

  required: ["name"],

  dependentRequired: {
    credit_card: ["billing_address"],
  },
};

const validate = ajv.compile(schema);

const data = [
  {
    name: "John Doe",
    credit_card: 5555555555555555,
    billing_address: "555 Debtor's Lane",
  },
  {
    name: "John Doe",
    credit_card: 5555555555555555,
  },
  {
    name: "John Doe",
  },
  {
    name: "John Doe",
    billing_address: "555 Debtor's Lane",
  },
];

data.map((row) => {
  const valid = validate(row);
  if (!valid) {
    console.log(validate.errors);
  }
});

Output:

[
  {
    instancePath: '',
    schemaPath: '#/dependentRequired',
    keyword: 'dependentRequired',
    params: {
      property: 'credit_card',
      missingProperty: 'billing_address',
      depsCount: 1,
      deps: 'billing_address'
    },
    message: 'must have property billing_address when property credit_card is present'
  }
]