http://en.wikipedia.org/wiki/Race_condition
http://api.jquery.com/jQuery.queue/ On Dec 16, 2013, at 11:30 AM, Dave Castellano wrote: > Hello, > > I have a weird problem that seems way over my skill level so could use > even some simple suggestions to point me in the right direction. > I have a set of 6 chained dropdown menus that work fine on my computer, > but do not retain the correct selections if I make the menu selections > too quickly on the Heroku server. > > Each time a selection is made from a dropdown, the session data is > updated with the following jQuery/ Ajax: > > # If BOOK dropdown clicked on. > chapters = $('#chapters').html() > $('#books').change -> > book = $('#books :selected').text() > book_id = $('#books :selected').val() > escaped_book = book.replace(/([ #;&,.+*~\':"!^$[\]()=>|\/@])/g, > '\\$1') > options = > $(chapters).filter("optgroup[label='#{escaped_book}']").html() > options = options.replace('selected="selected"', "") > options = ('<option value="">Select a Chapter</option>' + options) > $.ajax( > url: '/dropdowns/update_image_book', > data: "image_book_id=" + book_id) > if options > $('#chapters').html(options) > $('#chapters').prop('disabled', false) > $('#sections').html('<option value="">Select a > Section</option>') > $('#sections').prop('disabled', true) > $('#subsections').html('<option value="">Select a > Subsection</option>') > $('#subsections').prop('disabled', true) > $('#minisections').html('<option value="">Select a > Topic</option>') > $('#minisections').prop('disabled', true) > else > $('#chapters').empty() > Here is controller: > > def update_image_book > session[:image_book_id] = params[:image_book_id] > session[:image_chapter_id] = "" > session[:image_section_id] = "" > session[:image_subsection_id] = "" > session[:image_minisection_id] = "" > redirect_to pictures_path > end > > And the view: > <%= select_tag :books, > option_groups_from_collection_for_select(Subject.order(:title), :books, > :title, :id, :title, get_id_from_session(:book)), :prompt => "Select a > Book", :disabled => true %> > > After looking at the heroku logs, it looks like if I make the selections > too quickly, the most recent selection runs before the line > 2013-12-16T15:54:23.707522+00:00 heroku[router]: at=info method=GET > path=/dropdowns/update_image_book?image_book_id=3 > host=cryptic-mesa-2105.herokuapp.com fwd="75.118.31.205" dyno=web.1 > connect=13ms service=32ms status=302 bytes=113 > has a chance to run. > > Is this possible, and if so is there a better way to do this? > > Dave. > > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rubyonrails-talk+unsubscr...@googlegroups.com. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/212adbdf94acd401e3f6172022c4a896%40ruby-forum.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/5F8EDE0B-467E-4782-9409-A7B54BA8B13C%40datatravels.com. For more options, visit https://groups.google.com/groups/opt_out.
