Rails - render JavaScript with AJAX or redirect

Question

I have a rails remote form_for. For several reasons it is a way better idea to use AJAX to submit the form's contents. If there are errors saving the form I want to be able to render a .js.erb file to the page that updates the error div with a partial that displays all the errors.

If there are no errors I want to be able to just redirect and display a flash message.

Is this possible?

suslov.nikita · Accepted Answer · 2015-04-25 23:32:16Z

2

You can try something like this in your controller method:

if @code
   flash[:success] = 'Success message'
   render js: "window.location = '#{path}'"
else
   flash.now[:alert] = @instance.errors.full_messages
   render partial: 'your/partial'
end

Detailed explanation:

@code stands for a variable that keeps the code/information about executed model method;
@instance stands for a model instance;
path stands for a path you want to redirect in case there were no errors;
render js: <...> is used instead of redirect_to because you've probably set respond_to :html, :js in your controller, so the only way to do a redirect is to use javascript, otherwise you'll get the full rendered page that you are redirecting as an ajax response.
flash.now allows you to access messages (in your case, error messages) in the same request, as using only flash allows it only in the next request.

edited Apr 25, 2015 at 23:32

answered Apr 25, 2015 at 23:10

suslov.nikita

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