ActionController::UnknownFormat in Rails production only

Question

I'm trying to display a flash message when I clicked the "check" button without re-rendering the entire page.

In the development mode, the code below does work but doesn't in the production mode. Instead of staying in the main.html and displaying the flash message, it redirect me to "check" page.

The log console gave me debug messages below:

Completed 406 Not Acceptable in 2ms (ActiveRecord: 0.0ms)

ActionController::UnknownFormat (ActionController::UnknownFormat):
app/controllers/my_controller.rb:105:in `check'

Did I miss something for working on production mode?

main.html.erb

<div class="check"><%= render partial: 'check' %></div>
<%= f.submit :Check, class: "btn btn-default", remote: true, formaction: app_check_path %>

_check.html.erb

<div id = "notice">
</div>

check.js.erb

$("#notice").html('<p style="color: green;"><%= flash[:notice] %></p>').show().delay(5000).hide(0);

my_controller.rb

def check
   notice = "NOTICE!"
   respond_to do |format|
       format.js do
          flash[:notice] = notice
       end
   end
end

routes.rb

get 'app/check'
post 'app/check'

Answer 1

Try to the following

_check.html.erb

<% flash.each do |msg| %>
    <%= msg.html_safe %>
<% end %>

check.js.erb

$("#notice").html('<%= escape_javascript(render("check")) %>');

my_controller.rb

Change this line

notice = "<p style='color: green;'>NOTICE!</p>"

Hope to help

Answer 2

您需要以JS格式提交表单，以呈现JS类型的响应！