JSONAPI::Resources::Coercion

The gem adds type coercion to filters in jsonapi-resources.

Add this line to your application's Gemfile:

gem 'jsonapi-resources-coercion'

And then execute:

$ bundle

Or install it yourself as:

$ gem install jsonapi-resources-coercion

To use filter's type coercions you should specify the type option with one of predefined types. Supports next predefined types: integer, string, boolean, float, decimal, date_time, time, date.

class BookResource < JSONAPI::Resource
  filter :title, type: :string
  filter :qty, type: :integer
  filter :available, type: :boolean
  filter :weight, type: :float
  filter :price, type: :decimal
  filter :published_at, type: :date_time
end

You can define your own type coercion. Just define singleton class method. Example:

class ReaderResource < JSONAPI::Resource
  filter :book, type: :book, apply: ->(records, books, _options) do
                               # books will be an array of instance of Book
                               records.where(book_ids: books.map(&:id))
                             end
  
  def self.coerce_as_book!(val)
    Book.find_by!(title: val)
  rescue ActiveRecord::RecordNotFound
    raise CoercionError
  end
end

If a filter cannot be coerced then bad request will be performed.

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/gigorok/jsonapi-resources-coercion. 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.