Rails - Jun 2010 - Is there any way to have observe_field react to the current value of a field also?

I have a view, seen below, that shows a list of churches if the zip
code isn''t 01540 or 01537. This part works perfectly. The problem is
that this is the page is to edit an existing record also, so
observe_field needs to see that the zip code currently doesn''t match,
so the church list needs to be shown. Currently, even if the zip
doesn''t match, the list will only be shown after the field is changed,
even is the field is changed to the same value.. Here is the view,
controller code and church_select view in that order.. Please give me
a direction to look..

Thanks

Bob <bsm2th-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

View
<STYLE TYPE="text/css">
<!--
big{font-family: Arial; font-size: 16pt;}
--->
</STYLE>
<% fields_for @household, :builder => TaggedBuilder do |
household_form| %>
<pre>
<div id="household">
<%= household_form.text_field :first_name, :maxlength => 50, :size =>
15, :autocomplete => "off", :class => ''household
'' %>
<%= household_form.text_field :middle, :size => 1, :maxlength
=>1, :autocomplete => "off", :class => ''household
'' %>
<%= household_form.text_field :last_name, :maxlength => 50, :size =>
20, :autocomplete => "off", :class => ''household
'' %>
<%= household_form.text_field :address, :autocomplete => "off",
:class
=> ''household '' %>
<%= household_form.text_field :zip, :size=> 5, :autocomplete =>
"off", :class => ''household '' %>
<%= household_form.text_field number_to_phone(:phone, :area_code =>
true), :autocomplete => "off", :size => 14, :class =>
''household '' %>
</div>
<%= observe_field 	:household_zip,
					:url => {:controller => ''households'', :action =>
''watch_church''},
					:update => :church,
					:with => '':zip'',
					:frequency=> 0.5  %>
<div id="church">
</div>
<u><b>Federal Programs</b></u>			<b>Primary Income
</b><%household_form.select(:primary,   [[''1.
Employment'', 1],[''2.
Unemployment'', 2],[''3. SSI'', 4],[''4.
TANF/EADC'', 8],[''5. Other'', 16],
[''6. None'', 32]], :class => "household ") %>
<table>							<tr><td><%= household_form.check_box
:food_stamps %></
td></tr>
								<tr><td><%= household_form.check_box :wic
%></td></tr>
								<tr><td><%= household_form.check_box :school_breakfast
%></
td></tr>
								<tr><td><%= household_form.check_box :school_lunch
%></td></
tr>
								<tr><td><%= household_form.check_box :SFSD
%></td></tr></
table>
</b></pre>
<% end %>

controller
  def watch_church
    #  debugger
      if (params['':zip''] != "01540") &&
(params['':zip''] != "01537")
then
      render :partial => "church_select"
    else
      render(:nothing=>true)
    end
  end

church_select view
<b>Member of Local Church: </b>	 <%=
collection_select(''household'',
''church_id'', Church.find(:all), ''id'',
''name'') %>

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HI Bob,

On Mon, Jun 28, 2010 at 3:16 PM, Bob Smith
<bsm2th-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> The problem is
> that this is the page is to edit an existing record also, so
> observe_field needs to see that the zip code currently doesn''t
match,
> so the church list needs to be shown. Currently, even if the zip
> doesn''t match, the list will only be shown after the field is
changed,
For the initial page load you just need to test and render if
appropriate on the initial page load.

<div id="church">
  <% if @household.zip != xxxxx and @household.zip != yyyyy %>
      <%= render :partial => "church_select %>
  <% end %>
</div>

You need to change the render :nothing in your controller to render an
empty string or partial to empty the content of the church div when
appropriate.

HTH,
Bill

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How would this work with the observe_field later in the page ? This is 
an edit page, so if the field is changed, the page needs to react 
correctly This works fine for a new user, but will it be OK for changing 
an existing user ?

Thanks for the reply

Bob
> <div id="church">
>   <% if @household.zip != xxxxx and @household.zip != yyyyy %>
>       <%= render :partial => "church_select %>
>   <% end %>
> </div>
> 
> You need to change the render :nothing in your controller to render an
> empty string or partial to empty the content of the church div when
> appropriate.
> 
> HTH,
> Bill
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Hi Bob,

On Tue, Jun 29, 2010 at 12:28 PM, Bob Smith
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> How would this work with the observe_field later in the page ? This is
> an edit page, so if the field is changed, the page needs to react
> correctly This works fine for a new user, but will it be OK for changing
> an existing user ?
That''s what the second part, below, is about.
>> You need to change the render :nothing in your controller to render an
>> empty string or partial to empty the content of the church div when
>> appropriate.
Best regards,
Bill

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Never mind. I just tried it and it works perfectly. Thanks for the help.

Bob

Bob Smith wrote:
> How would this work with the observe_field later in the page ? This is 
> an edit page, so if the field is changed, the page needs to react 
> correctly This works fine for a new user, but will it be OK for changing 
> an existing user ?
> 
> Thanks for the reply
> 
> Bob
> 
>> <div id="church">
>>   <% if @household.zip != xxxxx and @household.zip != yyyyy %>
>>       <%= render :partial => "church_select %>
>>   <% end %>
>> </div>
>> 
>> You need to change the render :nothing in your controller to render an
>> empty string or partial to empty the content of the church div when
>> appropriate.
>> 
>> HTH,
>> Bill
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