Passing instance variable to js.erb

[Soichi Ishida]

Rails 3.1.3

Hi again.

I would like to pass an instance variable to "HERE!!!" in 'save.js.erb'

$('#listtrans').html(
'<%= escape_javascript(render :partial => "videos/script_list",
:locals => { :scripts => Script.find_all_by_video_id(HERE!!!) } ) %>
');

If I put a specific value, video_id, (18 in this case ) like

$('#listtrans').html('<%= escape_javascript(render :partial =>
"videos/script_list", :locals => { :scripts =>
Script.find_all_by_video_id(18) } ) %>');

works fine. Of course, this must be generalized.

So I tried,

$('#listtrans').html('<%= escape_javascript(render :partial =>
"videos/script_list", :locals => { :scripts =>
Script.find_all_by_video_id(<%= @video.id %>) } ) %>');

gives an error

ActionView::Template::Error
(/Users/ishidasouichi/Dropbox/Rails/script_youtube/app/views/videos/save.js.erb:3:
syntax error, unexpected '<', expecting ')'
...> Script.find_all_by_video_id(<%= @video.id );@output_buffer...

Also, I tried

@video.id
params[:video_id]
and so on.

Any idea?

Thanks in advance?

soichi

--
Posted via http://www.ruby-forum.com/.

[Michael Pavling]

On 16 February 2012 05:09, Soichi Ishida <li...@ruby-forum.com> wrote:
> I would like to pass an instance variable to "HERE!!!" in  'save.js.erb'

$('#listtrans').html('<%= escape_javascript(render :partial =>
"videos/script_list", :locals => { :scripts =>

Script.find_all_by_video_id(@video.id) } ) %>')

[Soichi Ishida]

Thanks for your answer but it give the error

Started POST "/scripts" for 127.0.0.1 at 2012-02-16 15:53:50 +0900
Processing by ScriptsController#create as JS
Parameters: {"utf8"=>"✓",
"authenticity_token"=>"9rMiPwxlQrXiAIgUy8Qqe77KXDezXmpLF4WLupZb5ME=",
"script"=>{"video_id"=>"18", "startp"=>"85", "text"=>"korejyadamedann"},
"commit"=>"save"}
(0.1ms) SELECT 1 FROM "scripts" WHERE "scripts"."startp" = 85 LIMIT
1
SQL (0.7ms) INSERT INTO "scripts" ("created_at", "startp", "text",
"updated_at", "video_id") VALUES (?, ?, ?, ?, ?) [["created_at", Thu,
16 Feb 2012 06:53:50 UTC +00:00], ["startp", 85], ["text",
"korejyadamedann"], ["updated_at", Thu, 16 Feb 2012 06:53:50 UTC
+00:00], ["video_id", 18]]
Rendered videos/save.js.erb (1.5ms)
Completed 500 Internal Server Error in 138ms

ActionView::Template::Error (Called id for nil, which would mistakenly
be 4 -- if you really wanted the id of nil, use object_id):
1:
2:
3: $('#listtrans').html('<%= escape_javascript(render :partial =>

"videos/script_list", :locals => { :scripts =>

Script.find_all_by_video_id(@video.id) } ) %>');
4:
5:
6:
app/views/videos/save.js.erb:3:in
`_app_views_videos_save_js_erb__2673251445733535399_2157206780'
app/controllers/scripts_controller.rb:47:in `block (2 levels) in
create'
app/controllers/scripts_controller.rb:43:in `create'

Does anyone know why?

[Michael Pavling]

On 16 February 2012 06:55, Soichi Ishida <li...@ruby-forum.com> wrote:
> Thanks for your answer but it give the error

Did you read the error? Google it?

> ActionView::Template::Error (Called id for nil, which would mistakenly
> be 4 -- if you really wanted the id of nil, use object_id):
>

>    3: $('#listtrans').html('<%= escape_javascript(render :partial =>
> "videos/script_list", :locals => { :scripts =>
> Script.find_all_by_video_id(@video.id) } ) %>');
>

>  app/views/videos/save.js.erb:3:in
>
> Does anyone know why?

It's most likely that @video (the instance variable you want the id
of) is nil. Use debugging techniques to break into the code where it's
being set and being used to inspect it.

[Soichi Ishida]

Thanks. To be honest, I was having the 'installing debugger' problem as
well ;)
It seems many people have the same problem in installing ruby-debug19.

So I hoped someone can guess from my writing but I realized the
importance of debugger now.

Thanks anyway. I will come back when the debugger problem is resolved.

sochi

[Michael Pavling]

On 16 February 2012 09:49, Soichi Ishida <li...@ruby-forum.com> wrote:
> Thanks. To be honest, I was having the 'installing debugger' problem as
> well ;)

You _can_ debug using "puts".... it's can just be painful and slow to
resolve issues (although you could've sorted this problem with it
quite fast ;-)

[Peter Vandenabeele]

On Thu, Feb 16, 2012 at 10:49 AM, Soichi Ishida <li...@ruby-forum.com> wrote:

Thanks. To be honest, I was having the 'installing debugger' problem as
well ;)
It seems many people have the same problem in installing ruby-debug19.

So I hoped someone can guess from my writing but I realized the
importance of debugger now.

Thanks anyway.  I will come back when the debugger problem is resolved.

For getting ruby debugger to work in 1.9.3 with Rails Gemfile,  I got it working,

but was quite some sweat ...

http://rails.vandenabeele.com/blog/2011/12/21/installing-ruby-debug19-with-ruby-1-dot-9-3-on-rvm/

I just checked now, and it see the latest version of linecache19 is still 0.5.12

(and the debugging only works with linecache 0.5.13). Probably a similar

problem with ruby-debug-base19 being 0.11.25 but needs to be 0.11.26 .

HTH,

Peter

[Soichi Ishida]

Thanks. Finally ruby-debug19 is working for me. It took me a long time
;)

[CavalryJim]

On Feb 15, 11:09 pm, Soichi Ishida <li...@ruby-forum.com> wrote:
> Rails 3.1.3
>
> Hi again.
>
> I would like to pass an instance variable to "HERE!!!" in  'save.js.erb'
>
> $('#listtrans').html(
>   '<%= escape_javascript(render :partial => "videos/script_list",
> :locals => { :scripts => Script.find_all_by_video_id(HERE!!!) } ) %>
> ');
>
> If I put a specific value, video_id, (18 in this case ) like

Check out the gem 'gon' along with Ryan Bates' recent RailsCast on the
topic of passing variables to JavaScript.

>
> $('#listtrans').html('<%= escape_javascript(render :partial =>
> "videos/script_list", :locals => { :scripts =>
> Script.find_all_by_video_id(18) } ) %>');
>
> works fine.  Of course, this must be generalized.
>
> So I tried,
>
> $('#listtrans').html('<%= escape_javascript(render :partial =>
> "videos/script_list", :locals => { :scripts =>
> Script.find_all_by_video_id(<%= @video.id %>) } ) %>');
>
> gives an error
>
> ActionView::Template::Error

> (/Users/ishidasouichi/Dropbox/Rails/script_youtube/app/views/videos/save.js .erb:3:

[Soichi Ishida]

Thanks. It will help!

[Minh Quy]

you should not use js with erb, it meet serious problem when you change variable rails without change js. You can use client variable gem, checkout more details https://github.com/Coffa/client_variable

[Tamara Temple]

Not as old a message as I've responded to, but this one was from February of 2012…

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