Hi, I''m using acts_as_taggable. I have a form that asks for a question and a tag for that question, something like: <% form_tag -%> <%= text_area("question", "question_text") %> <%= text_field("tag", "name") %> <%= submit_tag %> <% end_form_tag %> The question is one model. Tag is another. My problem is that I can''t figure out how to validate that the user inputs a tag. He must input both a question and a tag. My controller method looks something like: def add_question if request.get? @question = Question.new @tag = Tag.new #needed this so my errors_messages_for :tag will not cause error else @question = Question.new(params[:question]) if @question.save @question.tag(@params[:tag][:name]) flash[:notice] = "Thank you. Your question has been added." redirect_to edit_url(@question.id) end end end I tried nesting a transaction for both question and tag, but that didn''t work. I tried various ways of passing the tag names into the @question.tagmethod. My validations include: Class Question < ActiveRecord Base validates_presence_of :question_text, :message=>"must not be blank." validates_length_of :question_text, :maximum=>150, :message=>"must be less than 150 characters." end Class Tag < ActiveRecord Base validates_presence_of :name validates_length_of :name, :in => 1..20, :too_long => "Tag name too long - max 20 characters", :too_short => "Tag must have a name" end Suggestions are appreciated. Steve http://www.smarkets.net -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060316/d191d8f6/attachment.html