Count <li> items in div, RJS

Rails
1

Hello,

How i can count

  • items in div using RJS?
  • one
  • two
  • three
    • <%= link_to_remote.......ADD %>

    and in add action i want to add new li item with unique ID and get

  • 's elements count?

    Thanks

    • 2

    Hi Igor,

    Igor K. wrote:

    unique ID and get

  • 's elements count?
    Just count them in the controller method you invoke as you add them.
    Store
    the count in a session variable or in a table to persist your count.

    • HTH,
    Bill

    3

    unique ID and get

  • 's elements count?
    Just count them in the controller method you invoke as you add them.
    Store
    the count in a session variable or in a table to persist your count.

    • I have a following code in add.rjs

    count = 0
    page.select(’#results li’).each do |element|
    count = count + 1
    #element.hide
    end
    page.insert_html :bottom, ‘results’, "

  • #{a.to_s + "

    " + count.to_s}

    • "
    page.visual_effect :highlight, count.to_s, :duration => 2.5

    and following in view

  • one
    • <%= link_to_remote "add", :url => {:action => :add} %>

    and i always get count = 1

    4

    Hi Igor,

    Igor K. wrote:

    and following in view

  • one
    • <%= link_to_remote "add", :url => {:action => :add} %>

    and i always get count = 1

    I’m not sure I understand exactly what it is you’re trying to
    accomplish,
    but in general… I would recomment keeping track of ‘count’ in your
    controller method; storing / retrieving it there and making it available
    to
    your view via an instance variable. You’re not dealing with a static
    page
    of which you have no knowledge. Everything that’s on the page is put
    there
    by your app during the session. No?

    HTH,
    Bill

    5

    would recomment keeping track of ‘count’ in your

    controller method; storing / retrieving it there and making it available
    to
    your view via an instance variable. You’re not dealing with a static
    page

    Yes, if i work with dynamic pages i can save elements count to session,
    but my question is connected with static pages.
    For example designer add one element to div, and i set count variable in
    controller to 1, but when designed add new element to div, again i need
    to change count variable.
    i just want to know is it possible count some elements, for example

  • by id of
    where are they located.

    maybe anybody can give a advice how to set id of new element to unique
    value(i guess i can user time(in milliseconds) for example)

    Thanks

    • 6

    Hi Igor

    In an action in the controller, responding to the xhr request when you
    do

    render :update to |page|

    I just did a page.inspect in the log and found @content_for_layout - I
    think
    you would have to do something like page.session.content_for_layout -
    the
    log is pretty ugly - you can check.

    But, if you have @content_for_layout you could count the occurance of

  • in that and unless you have
  • in your layout you will have the number of li's.

    However, this sounds very convoluted - you would probably be better of
    just
    adding the milliseconds id for the li.

    cheers
    Ivor