Question

I have this to calling the choose_category:

{ :action => :choose_category, :id => category } do %>

And I have this method to calling the choose_category.js.rjs:

  def choose_category
    begin
      category               = Category.find(params[:id]) 
    rescue 
      ActiveRecord::RecordNotFound
      logger.error("Attempt to access invalid product #{params[:id]}") 
      # flash[:notice]      = "Invalid product" 
      redirect_to :action   => :index
    else
      respond_to { |format| format.js }    
      # redirect_to_index
    end
  end

I want to call back the category name, how can I do that? I try this, but it return nothing for me.

page.alert(@category.name)

Answer 1

Your problem is that @category isn’t defined in your RJS template.

RJS files are essentially views that generate Javascript. Like views, they have access to instance variables set in the controller, but not local variables.

Putting this in the begin section of your action should solve your problem.

@category               = Category.find(params[:id])