User defined formats with standalone validation code

The error we’re seeing is:

Error: CodeGen: "code" for formats0 not defined

Oddly this error does not occur if we use Ajv in our app, it only occurs if we try to make a standalone validator script.

What version of Ajv are you using? Does the issue happen if you use the latest version? 7.1.1 (latest)

Ajv options object

const ajv = new Ajv({
  code: {
    source: true, // this option is required to generate standalone code
  },
  removeAdditional: true,
});

JSON Schema

const demoSchema = {
  $id: 'demoSchema',
  additionalProperties: false,
  properties: {
    test: hexCodeValidator,
  },
};

Sample data

N/A - bug occurs during compilation of standalone Ajv.

Your code

Repro

Are you going to resolve the issue?

I cannot resolve the issue.

[epoberezkin]

@Slapbox RegExp format support in standalone code added in v8.0.2

Still worth amending the docs, for the formats defined as functions.

[epoberezkin]

Custom format functions support with standalone code is limited.

If simply using regular expression (not a function) works for your case - it works for the example, but maybe you have a more complex function, - then passing regular expression directly to addFormat would make it work.

If you do need a function then there is an instance option (see Options in api.md) to which you need to pass a “code snippet” that would result into an object with all formats - see ajv-formats here for the example how it can be done:

https://github.com/ajv-validator/ajv-formats/blob/master/src/index.ts#L55

An obvious improvement is to allow defining custom formats individually and pass “code snippets” for standalone code in their definitions.

It’s not well documented,