update action in posts controller

posts_controller.rb

def update
    respond_to do |format|
      case params[:commit]
       when "Save Draft"
          @post.update_attribute(:is_draft, "yes")
          format.html { redirect_to @post, notice: 'Post was successfully updated.' }
          format.json { head :no_content }
       when "Update Post"
          @post.update_attribute(:is_draft, "no")
          format.html { redirect_to @post, notice: 'Post was successfully updated.' }
          format.json { head :no_content }
       else
        format.html { render :action => "edit" }
        format.json { render :json => @post.errors, :status => :unprocessable_entity }
      end
    end
  end

The update action takes an id.
As opposed to the update_attributes method that assumes you are already working with the object.

So something like

Post.update(@post.id, post_params)

should work, given that you get the @post.id from the form you are working with and post_params is the whitelisted set of attributes you want to update the Post model with.

Also because YOLO