ActiveModelJsonValidator

This gem aims to provide an easy way to validate json and jsonb attributes against a JSON schema. This gem is based on ActiveModel and json-schema.

Add this line to your application's Gemfile:

gem 'activemodel_json_validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install activemodel_json_validator

Add your json validation in the model:

class User < ApplicationRecord
  validates :preferences, json: true
end

By default this validation will find an schema in: app/models/schemas/user/preferences.json.

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-04/schema",
  "required": [
    "locale",
    "currency"
  ],
  "properties": {
    "locale": { "type": "string" },
    "currency": { "type": "string" },
    "subscribed": { "type": "boolean" }
  }
}

user = User.new
user.preferences = { locale: 'en', currency: 'USD' }
user.valid? # => true

user.preferences = { currency: 100, subscribed: 'true' }
user.valid? # => false
user.errors[:preferences] # => Invalid json

Custom schema path could be passed to the validator:

class User < ApplicationRecord
  validates :preferences, json: {
    schema: Rails.root.join('schemas', 'preferences.json').to_s
  }
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/alejandrodevs/activemodel_json_validator. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the ActivemodelJsonValidator project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.