Link_to_remote

Rails
1

Hi!
I cant use funtions like link_to_remote in self defined calsses/objects
used from within my controller? Is there a readon for this, I dont
understand what libraries etc I need to include to get it running!

Best regards
/Rickard

2

hi!
Is there no one that has experienced the same problem? I’m getting sick
of this! Is it a bad description of the problem?

If this doesnt work, there must be a good work around, or I probably
have to leave ruby on rails. The thing is that I have an object in which
I want to generate HTML and return it back to the controller which in
turn displays it on the web page.

Ok, a simple example:
I want to do this in the object created from my controller:

link_to(“MyPage”, { :action => “run” }, :popup => [‘new_window’,
‘height=300,width=600’])

The error message:

NoMethodError in Init_test#index

You have a nil object when you didn’t expect it!
The error occured while evaluating nil.url_for

RAILS_ROOT: .
Application Trace | Framework Trace | Full Trace

#{RAILS_ROOT}…Ruby/lib/ruby/gems/1.8/gems/actionpack-1.10.2/lib/action_view/helpers/url_helper.rb:18:in
url_for' #{RAILS_ROOT}...Ruby/lib/ruby/gems/1.8/gems/actionpack-1.10.2/lib/action_view/helpers/url_helper.rb:49:inlink_to’
…

…the same problem is with e.g link_to_remote()

My includes are:

include ActionView::Helpers::JavaScriptHelper
include ActionView::Helpers::TagHelper
include ActionView::Helpers::FormOptionsHelper
include ActionView::Helpers::FormTagHelper
include ActionView::Helpers::UrlHelper

The url_helper.rb (line numbers are included)

16: def url_for(options = {}, *parameters_for_method_reference)
17: options = { :only_path => true }.update(options.symbolize_keys) if
options.kind_of? Hash
18: @controller.send(:url_for, options,
*parameters_for_method_reference)
19: end

I also found on the web a parameter called :controller => ‘ctrl_name’
which I thought could solve my problems since @controller at line 18
seems to be nil. But I cant get it to work and I have not found any
documentation around it!

/Rickard

rickthemick wrote:

Hi!
I cant use funtions like link_to_remote in self defined calsses/objects
used from within my controller? Is there a readon for this, I dont
understand what libraries etc I need to include to get it running!

Best regards
/Rickard

3

On Dec 5, 2005, at 12:02 AM, rickthemick wrote:

NoMethodError in Init_test#index
#{RAILS_ROOT}…Ruby/lib/ruby/gems/1.8/gems/actionpack-1.10.2/lib/
include ActionView::Helpers::TagHelper
(options.symbolize_keys) if

Best regards
/Rickard

Rickard-

Link_to_remote and friends are meant to be used in your views only.

Why are you trying to use them in your controller? Surely there is a
workaround you can use to move the code to the view where it belongs?

Cheers-
-Ezra Z.
Yakima Herald-Republic
WebMaster
http://yakimaherald.com
509-577-7732
[email protected]

4

I want to do this in the object created from my controller:

link_to(“MyPage”, { :action => “run” }, :popup => [‘new_window’,
‘height=300,width=600’])

Is there a reason you can’t do this in your view?

5

Seems to be no problem at all after taking a look at my code, thanks
again for your input!

/R

6

ezra wrote:

On Dec 5, 2005, at 12:02 AM, rickthemick wrote:

NoMethodError in Init_test#index
#{RAILS_ROOT}…Ruby/lib/ruby/gems/1.8/gems/actionpack-1.10.2/lib/
include ActionView::Helpers::TagHelper
(options.symbolize_keys) if

Best regards
/Rickard

Rickard-

Link_to_remote and friends are meant to be used in your views only.
Why are you trying to use them in your controller? Surely there is a
workaround you can use to move the code to the view where it belongs?

Cheers-
-Ezra Z.
Yakima Herald-Republic
WebMaster
http://yakimaherald.com
509-577-7732
[email protected]

Hi all!
Thanks for your replies and directions. Well, the thing is that the code
is quite complex and I probably have deceases from previous server side
scripting. When “link_to_remote” worked with just a few includes (in the
controller) I though this was appropriate.

In more detail I want to update multiple

's and in order to do this
I generate javascript funtions in one special
which updated the
other using update_element_function, like this:

The update_element_function contains the generated HTML string
(including the output of link_to_remote calls) and I guess this is not
possible to do in the view…

/R