Ruby on Rails passing variable from View to Controller

Question

I have this on the view:

th = link_to "ID", :search_form => @search_form

and this on the Controller:

@search_form = params[:search_form]

On the debugger no parameter :search_form is displayed and on the program it leads to a nil error while on the controller there is an actual declared @search_form variable. Why is it empty on the Controller ?

Answer 1

You need to specify a path in your link_to

= link_to 'ID', some_path(search_form: @search_form)

alternatively you can specify the controller and action like this

= link_to 'ID', url_for(controller: :some_controller, action: :show, search_form: @search_form)