Rails CRUD

1.   def create
       @product = Product.new(params[:product])
       if @product.save
         flash[:notice] = 'Product was successfully created.'
         redirect_to :action => 'list'
       else
         render :action => 'new'
       end
     end
2.   
3. def update
4.     @product = Product.find(params[:id])
5.     if @product.update_attributes(params[:product])
6.       flash[:notice] = 'Product was successfully updated.'
7.       redirect_to :action => 'show', :id => @product
8.     else
9.       render :action => 'edit'
10.     end
11.   end
15.   def destroy
16.     Product.find(params[:id]).destroy
17.     redirect_to :action => 'list'
18.   end