ruby on rails将实例变量从视图传递给控制器

Question

I have the follwoing form in my view :

I have an instance variable @selected_folder somewhere above in this view

<%= form_for :workflow_selection, :remote => true, :method => "get", :url => {:action => "final_submission"} do |f| %>  

            <p> Check the workflows needed and then click on the button with folder name</p>

            <% @workflow_map[@selected_folder].each do |i| %> 

            <p><%= f.check_box(i)%> <%= f.label(i, i)%><br /><p>
            <% end %>

            <br />
            <p><%= f.submit @selected_folder%></p> 
            <% end %>

I want to label the submit button as just ' submit' and should still be able to pass the @selected_folder instance variable to the final_submission action mentioned in the form_for tag

I tried various option like

<%= form_for :workflow_selection, :remote => true, :method => "get", :selected_folder => @selected_folder
    :url => {:action => "final_submission"} do |f| %>  

i tried to create a select drop down and hide it from view but still trying it to pass once the submit button is clicked.

and some more options..

None of them worked

Please help.

Answer 1

If you want to pass @selected_folder along in the form submission, you can add a hidden_field_tag.

As per Rails documentation:

hidden_field_tag(name, value = nil, options = {})

So in your case

<%= hidden_field_tag 'selected_folder', @selected_folder %>

in the workflow_selection, selected_folder will be present in the form hash.