Comments on: How to dynamically update form elements in Rails using Ajax http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/ Tue, 12 Jan 2010 15:47:05 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: FSS http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-14874 FSS Tue, 12 Jan 2010 15:47:05 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-14874 Thank you very much!! I´m an experienced programmer but newbie in ruby and rails, ajax and all that jazz and in a rush. All examples found even in books are too simple to be applied. Others in forums get into innecesary trouble. This one is closer to my needs (the two selects come from 2 different tables, and inside a form_for) and updating directly over the named select allowed me to get the job done with really minor changes (the find clause didn´t work for me in that format). Good job Neal. Thank you very much!! I´m an experienced programmer but newbie in ruby and rails, ajax and all that jazz and in a rush. All examples found even in books are too simple to be applied. Others in forums get into innecesary trouble. This one is closer to my needs (the two selects come from 2 different tables, and inside a form_for) and updating directly over the named select allowed me to get the job done with really minor changes (the find clause didn´t work for me in that format). Good job Neal.

]]> By: bonyiii http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-11461 bonyiii Thu, 30 Apr 2009 10:14:45 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-11461 Hi i use "remote_function" within the select element, so i don't need observer. Just thought to share it: remote_function( { :controller => "test",:action => "get_cities" }, :update=>:cities, :with => "city_id" ) } %> Hi i use “remote_function” within the select element, so i don’t need observer. Just thought to share it:

remote_function(
{ :controller => “test”,:action => “get_cities” },
:update=>:cities,
:with => “city_id”
)
} %>

]]> By: Jack Zelig http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-11344 Jack Zelig Sun, 26 Apr 2009 18:17:36 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-11344 Mail is "jack dot zelig at gmail dot com" by the way Mail is “jack dot zelig at gmail dot com”
by the way

]]> By: Jack Zelig http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-11343 Jack Zelig Sun, 26 Apr 2009 18:16:12 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-11343 Hi, Thanks for the tutorial. I used this to great effect on the form I am designing for work. However, one major issue is that the dynamically created menus don't survive a page refresh. That is, if you press submit, the form flags an error and thus re-renders itself (highlighting the errors) then the dynamically created menu vanishes (only the initial promt is displayed). This was kind of annoying so I wrote a simple javascript routine to recreate and repopulate the field based on what was sent in object(:params). I'm sure I can't be the only one having this problem so if anyone needs any help with this then send me a mail and I'll be happy to explain how I solved it. Thanks again for the tutorial. Keep up the good work. Hi,
Thanks for the tutorial. I used this to great effect on the form I am designing for work.
However, one major issue is that the dynamically created menus don’t survive a page refresh. That is, if you press submit, the form flags an error and thus re-renders itself (highlighting the errors) then the dynamically created menu vanishes (only the initial promt is displayed).
This was kind of annoying so I wrote a simple javascript routine to recreate and repopulate the field based on what was sent in object(:params).
I’m sure I can’t be the only one having this problem so if anyone needs any help with this then send me a mail and I’ll be happy to explain how I solved it.
Thanks again for the tutorial.
Keep up the good work.

]]> By: Diego http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-8298 Diego Fri, 06 Feb 2009 12:41:22 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-8298 You can use the "options_for_select(collection_here)" helper for create the option tags inside desired select tag without iterators or partial layouts. Use it directly like "page.replace_html 'select_id', options_for_select(collection_here)". You can use the “options_for_select(collection_here)” helper for create the option tags inside desired select tag without iterators or partial layouts. Use it directly like “page.replace_html ’select_id’, options_for_select(collection_here)”.

]]> By: Adam Teale http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-2834 Adam Teale Tue, 02 Sep 2008 08:00:31 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-2834 Thanks a lot Neal! Your tutorial has giving a far better understanding of observe_field and menus. I almost have it working (no errors in the terminal), but my 2nd menu refreshes with an empty list - no worries, i hopefully can work it out Cheers! Adam, Bangkok Thanks a lot Neal! Your tutorial has giving a far better understanding of observe_field and menus. I almost have it working (no errors in the terminal), but my 2nd menu refreshes with an empty list – no worries, i hopefully can work it out
Cheers!
Adam,
Bangkok

]]> By: Sara http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-2100 Sara Fri, 25 Apr 2008 03:41:05 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-2100 Hey, I got it to work!! I had to change the following 2 things: In the controller, changed the find method to say: @cities = City.find_all_by_states_id(params['states_id']) and in the view, changed the observe_field statement to say: :with => "states_id", It works! Awesome! Hey, I got it to work!! I had to change the following 2 things:

In the controller, changed the find method to say:

@cities = City.find_all_by_states_id(params['states_id'])

and in the view, changed the observe_field statement to say:

:with => “states_id”,

It works! Awesome!

]]> By: Sara http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-2097 Sara Thu, 24 Apr 2008 23:04:46 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-2097 I can't get this to work either. I am using Rails 2.0 -- does that matter? I am using Firefox 2.0. When I click an option in the "states" list, nothing happens. For some reason the "cities" dropdown will not populate. I can’t get this to work either. I am using Rails 2.0 — does that matter?

I am using Firefox 2.0. When I click an option in the “states” list, nothing happens. For some reason the “cities” dropdown will not populate.

]]> By: Christian Frugard http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-721 Christian Frugard Tue, 02 Oct 2007 19:33:44 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-721 I am using an :observe_field on a series of select elements. It is pretty successful. I think I have found a bug though. When I change the option in a select, the :with parameter is sent, the next element is updated, and everything is good. Processing IpController#select_technology (for 0.0.0.0 at 2007-09-2711:31:39) [POST]Session ID: c2e7072af4526b7b7a617e526e3d161bParameters: {"ip_info_vw_ring_technology_key"=>"1","action"=>"select_technology", "controller"=>"ip"} If I change the option in the first select again, quickly (2 seconds later), the action sent to the controller does not contain the :with parameter. Processing IpController#select_technology (for 0.0.0.0 at 2007-09-2711:31:41) [POST]Session ID: c2e7072af4526b7b7a617e526e3d161bParameters: {"action"=>"select_technology", "controller"=>"ip"} If I wait a little longer between changing options (6-7 seconds), it behaves correctly. Is this a bug anyone else has seen? Thanks for your help, Christian I am using an :o bserve_field on a series of select elements. It is pretty successful. I think I have found a bug though. When I change the option in a select, the :with parameter is sent, the next element is updated, and everything is good.

Processing IpController#select_technology (for 0.0.0.0 at
2007-09-2711:31:39) [POST]Session ID:
c2e7072af4526b7b7a617e526e3d161bParameters:
{“ip_info_vw_ring_technology_key”=>”1″,”action”=>”select_technology”,
“controller”=>”ip”}

If I change the option in the first select again, quickly (2 seconds later), the action sent to the controller does not contain the :with parameter.
Processing IpController#select_technology (for 0.0.0.0 at
2007-09-2711:31:41) [POST]Session ID:
c2e7072af4526b7b7a617e526e3d161bParameters:
{“action”=>”select_technology”, “controller”=>”ip”}

If I wait a little longer between changing options (6-7 seconds),
it behaves correctly. Is this a bug anyone else has seen?

Thanks for your help,

Christian

]]> By: Michael http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/comment-page-1/#comment-669 Michael Tue, 18 Sep 2007 02:27:26 +0000 http://nealenssle.com/blog/2007/04/12/how-to-dynamically-update-form-elements-in-rails-using-ajax/#comment-669 This isn't working for me... When I select an option from the first SELECT field, the second SELECT field just grays out. Any ideas? Thanks. This isn’t working for me…

When I select an option from the first SELECT field, the second SELECT field just grays out. Any ideas?

Thanks.

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