I am trying to implement a simple search and sort for my webapp. I am following the [railscast][1] and this [railscast][2]. 

My application helper for sortable function which I am using as link is:

    def sortable(column, title = nil)
          title ||= column.titleize
          css_class = column == sort_column ? &quot;current #{sort_direction}&quot; : nil
          direction = column == sort_column &amp;&amp; sort_direction == &quot;asc&quot; ? &quot;desc&quot; : &quot;asc&quot;
          link_to title, params.merge(:sort =&gt; column, :direction =&gt; direction, :page =&gt; nil), {:class =&gt; css_class}
        end
I am using these in the view. In the controller I am using white listing as:

     @listingssearch.where(:vehicletype =&gt; &#39;Car&#39;).order(sort_column + &quot; &quot; + sort_direction).paginate(:page =&gt; params[:page], :per_page =&gt; 30)

Private Methods for sanitization:
   

     private
         def sort_column
              Listing.column_names.include?(params) ? params[:sort] : &quot;rateperhour&quot;
            end
        
            def sort_direction
              %w[asc desc].include?(params[:direction]) ? params[:direction] : &quot;asc&quot;
            end

I tried using merge in the private method:

    (Listing.column_names + params) but its not working 

For the helper methods **I am getting an error when I am trying to provide search params** to the sorting link: unable to convert unpermitted parameters to hash

It shows the error is for merge

    link_to title, params.merge(:sort =&gt; column, :direction =&gt; direction, :page =&gt; nil), {:class =&gt; css_class}

The otherway around works fine:

    &lt;%= bootstrap_form_for listings_path, :method =&gt; &#39;get&#39; do %&gt;
    
    		&lt;%= hidden_field_tag :direction, :value =&gt; params[:direction] %&gt;
    		&lt;%= hidden_field_tag :sort,:value =&gt; params[:sort] %&gt;
    
    		
    		
    		&lt;div class= &quot;col-sm-12 col-lg-12 col-md-12&quot; style = &quot;margin: auto;&quot;&gt;
    			&lt;h6 style = &quot;color:#7C064D;&quot;&gt;&lt;strong&gt; PICK A DATE  &lt;span class=&quot;glyphicon glyphicon-calendar&quot;&gt;&lt;/span&gt;&lt;/strong&gt;
    			&lt;%= date_field_tag :startdate, params[:startdate], placeholder: &#39;DATE&#39; %&gt;			
    			&lt;/h6&gt;
    		&lt;/div&gt;	
    
    		&lt;div class= &quot;col-sm-12 col-lg-12 col-md-12&quot; style = &quot;margin: auto;&quot;&gt;	
    		&lt;p&gt;		
    			&lt;%= text_field_tag :near, params[:near], placeholder: &#39; Destination&#39; %&gt;
    			&lt;%= text_field_tag :radius, params[:radius], placeholder: &#39; Search Radius&#39; %&gt;
    		&lt;/p&gt;
    		&lt;/div&gt;		
    		&lt;div class= &quot;col-sm-12 col-lg-12 col-md-12&quot; style = &quot;margin: auto;&quot;&gt;	
    		&lt;p&gt;		
    			&lt;%= text_field_tag :min, params[:min], placeholder: &#39; Minimum Rate Per Hour&#39; %&gt;
    			&lt;%= text_field_tag :max, params[:max], placeholder: &#39; Maximum Rate Per Hour&#39; %&gt;
    		&lt;/p&gt;
    		&lt;/div&gt;
    
    		&lt;div class= &quot;col-sm-12 col-lg-12 col-md-12&quot; style = &quot;margin-top: 10px;&quot;&gt;		
    			&lt;%= submit_tag &quot;Search&quot;, class: &quot;btn btn-info&quot;, style: &quot;width: 40%; background-color: #E20049; border: #e20049;&quot; %&gt;
    			&lt;%= link_to &#39;View All&#39;, root_path, class: &quot;btn btn-info&quot;, style: &quot;width: 40%; background-color: #E20049; border: #e20049;&quot; %&gt;
    		&lt;/div&gt;
    
    		&lt;!-- &lt;div class= &quot;col-sm-6 col-lg-6 col-md-6&quot; style = &quot;margin-top: 10px;&quot;&gt;		
    			
    		&lt;/div&gt; --&gt;
    		
    		
    	&lt;% end %&gt;


**My question is How to persist search params in sort helper methods in rails 5? What I am doing wrong?**


  [1]: http://railscasts.com/episodes/240-search-sort-paginate-with-ajax
  [2]: http://railscasts.com/episodes/37-simple-search-form




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Rails Unable to convert unpermitted parameters to hash