RoR ruby -- undefined method `model_name' for NilClass:Class -


i'm having trouble update on class.

this view:

    <div id = "list">         <%= form_for @list |form| %>         <%= render 'shared/error_messages', object: form.object %>         <div class="list_fields">          <%= form.text_field :name, placeholder:

and controller:

     def update          if @list.update_attributes(params[:list])             flash[:success] = "list updated"          else             render 'edit'          end          redirect_to @list     end

the routes are:

       resources :lists, only: [:create, :show, :destroy,:edit]

now problem keeps raising 

      "undefined method `model_name' nilclass:class"             in line 2  --->   <%= form_for @list |form| %>

and can't seem figure out why. in advance leo

you have load @list before update attributes.

def update   @list = list.find_by_id(params[:id])   if @list.update_attributes(params[:list])     flash[:success] = "list updated"   else     render 'edit'   end   redirect_to @list end

and way, problem see not caused update action edit action redirects view.

you have load @list in both actions. in edit action in order render view, in update action in order update appropriate object.


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