Passing instance variable to js.erb

rubyonrails-talk
1

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

2

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

3

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?

soichi

4

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.

5

Thanks. To be honest, I was having the 'installing debugger' problem as well :wink: 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

6

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 :wink:

7

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

8

Thanks. Finally ruby-debug19 is working for me. It took me a long time :wink:

soichi

9

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.

10

Thanks. It will help!

soichi

11

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

12

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