rails observe_field

Question

i have used observed_field for arrays of data... but i am having trouble making a simple, one field application of it work. i must be missing a very simple detail. have searched extensively for basic syntax and cannot find anything that applies. when i change the selection, the change is not saved and there is no error msg.

<% form_for :team, :url => update_item_leader_group_path do |f| %>

    <%= f.select :item_id, @selection_collection %>  

    <span id="trigger_spinner" style="visibility: hidden;">
        <img src="/images/spinner.gif" alt="Loading..." />
    </span>

    <%= observe_field 'group_item_id',  
        :url => { :controller => :group, :action => :update_item },  
        :method => :put,  
        :with => "'trig=' + $('group_item_id').value" %>
        :loading => "$('trigger_spinner').setStyle({visibility: 'visible'});",
        :complete => "$('trigger_spinner').setStyle({visibility: 'hidden'});" %>

<% end %>

We need more information like what you really happen :( – shingara Nov 09 '10 at 18:34 — shingara, Nov 09 '10 at 18:34

hurikhan77 · Answer 1 · 2010-11-09T21:03:51.230

2

The onchange event may not be observed until you leave the focus of the select field. To watch some field changes instantly your only option is to use a form observer.

BTW: The dom id of your field is probably not item_id due to usage of the form builder. @Swards already pointed that out.

edited Nov 09 '10 at 21:03

answered Nov 09 '10 at 19:29

hurikhan77

5,881
3
32
47

included response to you in comment to Sward above – Jay Nov 09 '10 at 20:37

score 1 · Accepted Answer · answered Nov 09 '10 at 19:25

1

The id of the field is usually something like id='group_item_id', could this be the issue?

answered Nov 09 '10 at 19:25

Mark Swardstrom

17,217
6
62
70

thank you Swards and hurikhan77. the onchange event is now observed so one step closer! i updated the snippet above for your input. now i am getting a syntax error on... – Jay Nov 09 '10 at 20:35
:with => "'group_item_id=' + escape(value)" – Jay Nov 09 '10 at 20:35
changing to... :with => "'item_id=' + escape(value)" also results in... syntax error, unexpected '.', expecting ')' :with => "'item_id=' + escape(value)" ).to_s); @output_buffer.concat "\n" – Jay Nov 09 '10 at 20:42
@Jay Use `:with => :group_item_id` - no fancy escaping or similar. Rails will do the magic for you. If you really want to use the escape function, use `escape(this.value)`. – hurikhan77 Nov 09 '10 at 21:01
there was an extra character that i took out so the syntax is fixed... but still not saving the data. – Jay Nov 09 '10 at 21:44

score 0 · Answer 3 · answered Nov 09 '10 at 22:52

0

corrected syntax above 1. form path 2. observer "url" 3. observer "with"

there was also a routing problem. i had to move update_item from a map.resources member to collection

answered Nov 09 '10 at 22:52

Jay

6,206
11
48
82

rails observe_field

3 Answers3