If you need more advanced React-integration, like server rendering, redux, or react-router, see shakacode/react_on_rails, react-rails, and webpacker-react.

This gem also includes a responders controller generator, so your scaffold can be customized to use respond_with instead of default respond_to blocks. From 2.1, you need to explicitly opt-in to use this generator by adding the following to your config/application.rb: config.app_generators.scaffold_controller :responders_controller

Responders don't use valid? to check for errors in models to figure out if the request was successful or not, and relies on your controllers to call save or create to trigger the validations.

Arguably, the rails-team's choice of raising ArgumentError instead of validation error is correct in the sense that we have full control over what options a user can select from a radio buttons group, or can select over a select field, so if a programmer happens to add a new radio button that has a typo for its value, then it is good to raise an error as it is an application error, and not a user error. However, for APIs, this will not work because we do not have any control anymore on what values get sent to the server.

liberal_enum :kind

When the controller creates the user, instead of adding a validation error to the record, it raises an exception. How to avoid this?

I really dislike the reasoning as stated in the issue listed above. Since the value is coming over the wire, it should be treated the same as a freetext input where the expectation is to validate in the model and not the controller. This is especially true in APIs where the developers have even less of a say as far as expected input coming from form data (for example).

In case anyone wants a hack, here is what I came up with.

But now the first line throws an exception ArgumentError: '0' is not a valid audience

At each stage of developing the sample application, we will write small, bite-sized pieces of code—simple enough to understand, yet novel enough to be challenging. The cumulative effect will be a deeper, more flexible knowledge of Rails, giving you a good background for writing nearly any type of web application.

Following the scaffolding approach risks turning you into a virtuoso script generator with little (and brittle) actual knowledge of Rails.

"American Idiot" - Green Day

Now everybody do the propaganda,And sing along to the age of paranoia.

We're not the ones who're meant to follow.

Television dreams of tomorrow.

require 'active_record/connection_adapters/postgis_adapter/railtie'

require 'active_record/connection_adapters/postgis/railtie'