default filter q params through controller method

app/controllers/clients_controller.rb

@@ -8,7 +8,7 @@ class ClientsController < ApplicationController
 
   def index
     authorize Client
-    @q = policy_scope(Client).ransack(params[:q])
+    @q = policy_scope(Client).ransack(default_filter)
     @q.sorts = ['created_at desc'] if @q.sorts.empty?
     @clients = @q.result
     respond_to do |format|
@@ -80,6 +80,15 @@ class ClientsController < ApplicationController
 
   private
 
+  def default_filter
+    return { acceptance_not_eq: 2 } if params[:q].blank?
+    filters = params.to_unsafe_hash[:q]
+    if filters[:acceptance_eq].present? || filters[:contact_full_name_cont].present?
+      filters.except(:acceptance_not_eq)
+    else
+      filters.merge(acceptance_not_eq: 2)
+    end
+  end
   end
 
   def set_client