A question about ajax

Rails
1

I defines a partial see below:
<%=
puts @project.version
text_field_tag “project_version”, @project.version
%>

I want the project version update-to-date. The first line can print the
correct version value but the text field doesn’t refresh to the new
version.

2

Hi,

First of all, if you want to use puts in your views, use <% %> tags
rather
than <%= %> tags.
Secondly, if you load your partials once you have your data
object(@project)
with appropriate value your page should display the same.
But if you change the value of @project.version after the partial is
loaded,
it would not be reflected on the page until you reload the particular
div
which has the text field tag with the partial.

-NAYAK

On Tue, Dec 30, 2008 at 6:42 PM, Zhao Yi

3

NAYAK wrote:

First of all, if you want to use puts in your views, use <% %> tags
rather than <%= %> tags.

I defines a partial see below:
<%=
 puts @project.version
 text_field_tag "project_version", @project.version
%>

The above will puts the @project.version to the STDOUT stream, then will
return
the text_field_tag into the <%= %> location.

This is a subtle hair to split (and ‘p’ is more useful than ‘puts’
there), but
debugging out of the top of a <%= %>, while expressing its last line, is
very
common…

–
Phlip

4

Vishwanath Nayak wrote:

Hi,

First of all, if you want to use puts in your views, use <% %> tags
rather
than <%= %> tags.
Secondly, if you load your partials once you have your data
object(@project)
with appropriate value your page should display the same.
But if you change the value of @project.version after the partial is
loaded,
it would not be reflected on the page until you reload the particular
div
which has the text field tag with the partial.

-NAYAK

On Tue, Dec 30, 2008 at 6:42 PM, Zhao Yi

Hi,

This is my controller code:

def update_project_selection

@project = Project.find(:all,:conditions=>"name=’#{selected_project}’
")
render :partial => “project_version”, :layout=>false
end

I update the @project object before load the partial. Why does the page
display the same value?

Below is the view page:

<%=
select_tag:project_selection,options_for_select(@project_names)
%>

<%=
observe_field :project_selection,
:frequency => 0.5,
:update => ‘ajaxWrapper’,
:url => {:action => ‘update_project_selection’},
:with => “‘project_selection=’+encodeURIComponent(value)”
%>

5

I know what the problem. I set up a wrong update value in observe_field
element.