anchor.diff:  
       <div class="container">
         <div class="control-group">
  +        <% if session[:user_id] %>
           <button id="create_trainer" class="btn btn-default btn-info" type="button">
             Create Trainer
           </button>
  -        
  +        <% end %>
         </div>
         <br />
   
  
positive.code:               <span>Hour Price <b><%= trainer.hour_price%> KM</b></span>
              </div>
              <div class="clearfix"></div>
  
              <div style="padding-left: 20px; padding-top: 10px;">
              <%= link_to trainer_path(trainer), :class => "btn btn-sm btn-danger", :method => :delete, :title => 'Delete Trainer', :confirm => "Are you sure?" do%>
                <span>Delete Trainer</span>
              <% end %>
              </div>
  
  
  
            <div class="control-group">
  
negative.code:             </button>
              </div>
              </div> 
              <% end %>
              <div class="row"> 
  
  
  