Question

I’ve got a generator form_tag where I have checkboxes. I’m not saving these records to the db, but I want to operate on them, so I’ve got i my ‘create’ method:

...
  def create
    @generator = Generator.new(params[:generator])
    @fname = @generator[:fname]
    redirect_to generators_show_path
...

where ‘fname’ is one of the checkboxes 😉
And I’ve got in ‘show’ file:

<p>
  <b>Fname:</b>
    <% if @fname.nil? %>
      fname is nil!
    <% else %>
      fname has a value:D
    <% end %>
</p>

But every time fname is nil! why?? 🙁

Answer 1

It seems that you set @fname in action create and then redirect to action show (where the view gets rendered).

When a redirection happens, the current request (existing as an instance of your controller) is finished, and a new request is made – which does not share @fname with the previous one.

Therefore, if you want to get the value of @fname right, you should either render the view in action create or set @fname in action show.