ajv - Another JSON schema Validator

One of the fastest JSON schema validators. It uses doT templates to generate super-fast validating functions.

TODO

• remote refs
• custom formats (via options)
• schema validation before compilation
• bundle compiled templates (doT will be dev dependency)

Install

npm install ajv

Usage

var ajv = require('ajv')(options);
var validate = ajv.compile(schema);
var valid = validate(data);
if (!valid) console.log(validate.errors);

or

// ...
var valid = ajv.validate(schema, data);
// ...

ajv compiles schemas to functions and caches them in both cases (using stringified schema as a key - using json-stable-stringify), so that the next time the same schema is used (not necessarily the same object instance) it won't be compiled again.

Options

• allErrors: check all rules collecting all errors. Default is to return after the first error.
• verbose: include the reference to the validated data in the errors.
• format: validate formats (true by default).
• uniqueItems: validate uniqueItems (true by default).
• unicode: calculate correct length of strings with unicode pairs (true by default - string lengths are calculated correctly but it is slower). Pass false to use string.length that is faster, but gives "incorrect" lengths of strings with unicode pairs - each unicode pair is counted as two characters.
• beautify: format the generated function with js-beautify. npm install js-beautify to use this option.

Tests

git submodule update --init
npm test