Question

I have a little problem:

I have this in my model:

validates :title, :presence => true, :uniqueness => true, :format => /[A-Z][A-Za-z0-9\-_]*/i

This in my controller:

  def create
    @page = Page.new params[:page]

    if verify_recaptcha(:model => @page) && @page.save
      redirect_to @page
    else
      render :action => :new
    end
  end

However, someone created a page with a + in its title. How can this happen? Is the RegEx wrong? I can’t find the problem.

Answer 1

Try putting start and end matchers in your regex:

/^[A-Z][A-Za-z0-9\-_]*$/

Otherwise it still matches if the + is at the start or end.