Search form for Paper_trail history using Ransack gem

Question

I'm struggling to get a search form for my active record history. I'm using the paper_trail gem as well as ransack. Both, alone, are working well. But whenever I try to implement a search form I get a strange error:

undefined method `paper_trail_versions_path' for #<#:0x007fede31da910>

This line from my views gets highlighted:

<%= search_form_for @q, html: {class: "input-group"} do |f| %>

Here's the code of the controller:

def history
 @all_versions = PaperTrail::Version.order('created_at DESC')
 @versions = @all_versions.paginate(:page => params[:page], :per_page => 100)
 @q = @versions.search(params[:q])
 @versions = @q.result
 respond_to do |format|
    format.html
  end
end

the views:

<%= search_form_for @q, html: {class: "input-group"} do |f| %>
  <%= f.search_field :whodunnit_or_item_id_cont, placeholder: "Search for Users or Actions..", class: "form-control" %>
  <span class="input-group-btn">
    <%= button_tag(type: 'submit', class: "btn btn-default") do %>
    <i class="fa fa-search"></i>
    <% end %>
  </span>
<% end %>

Any Ideas?

Thanks in advance!

EDIT resolved, thanks to answer:

<%= search_form_for @q, html: {class: "input-group"}, :url => "/dashboards/history/" do |f| %>

Answer 1

The error your see comes from the URL the search_form_for helper tries to guess for your form's action.

Under the hood , Ransack uses the polymorphic_path rails helper, which is, according to the doc , a method

for smart resolution to a named route call when given an Active Record model instance

In your case, your model is a PaperTrail::Version , which resolves to paper_trail_versions_path .

To fix the error, you can either :

• define the corresponding resource in your routes.rb file, so that the helper is defined
• manually define the helper
• provide to the search form a url option, with the path to your form's action.

Hope it helps!