Noob RJS Template Trouble

rubyonrails-talk
1

Hello,

I am certain this is a simple thing. The crazy thing is that last summer I created my first Rails application with some .rjs templates and that still works. But making a new one recently I have become totally stumped. I thought it was something complicated I was doing (update the DOM, insert some HTML...) so I backed way off, created a test application and just tried to do Hello, World. No joy.

MacOS, latest. Rails 2.1.2.

Fire up Mongrel on post 3000. It loads the index.rhtml file just file. Shows me the link which is coded like this:

   link_to_remote("Say hello",{:action => 'hello'})

then hello.rjs is just    page.alert "Hello!"

Okay, I'm missing the "world" part.

I load the first page and then click on the link. The log says: Processing JavaController#index (for 127.0.0.1 at 2009-01-29 10:23:13) [GET]   Session ID: dee44c8f4a7b2ded8b35130b173b5c37   Parameters: {"action"=>:index, "controller"=>"java"} Rendering template within layouts/application Rendering java/index Completed in 0.07462 (13 reqs/sec) | Rendering: 0.07254 (97%) | DB: 0.00000 (0%) | 200 OK [http://localhost/\]

Processing JavaController#index (for 127.0.0.1 at 2009-01-29 10:23:19) [POST]   Session ID: BAh7BzoMY3NyZl9pZCIlZjA1NjRjOTZjZTBmNTBmMmQwYjFhN2U1ZmIyYTM0 OWQiCmZsYXNoSUM6J0FjdGlvbkNvbnRyb2xsZXI6OkZsYXNoOjpGbGFzaEhh c2h7AAY6CkB1c2VkewA=--0338e780c3835ee34ea7c407d42824deb09880b7   Parameters: {"authenticity_token"=>"a59d4b5adc4b75d2b1573e23569e157c8f6471f9", "action"=>:index, "controller"=>"java"} Rendering java/index Completed in 0.00281 (356 reqs/sec) | Rendering: 0.00070 (24%) | DB: 0.00000 (0%) | 200 OK [http://localhost/\]

headers in Firebug were: Connection close Date Thu, 29 Jan 2009 18:23:19 GMT Set-Cookie _test_session=BAh7ByIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo %0ASGFzaHsABjoKQHVzZWR7ADoMY3NyZl9pZCIlZjA1NjRjOTZjZTBmNTBmMmQw %0AYjFhN2U1ZmIyYTM0OWQ%3D--f06ff17de7891930dbb01ebce2bc90d476b9d9d6; path=/ Status 200 OK X-Runtime 0.00281 Etag "25d3a7f2cfd3bfe151df328b04ff9b0e" Cache-Control private, max-age=0, must-revalidate Server Mongrel 1.1.5 Content-Type text/html; charset=utf-8 Content-Length 390

What else should I post to help someone clue me in here? Why don't I get the little sheet-dialog dropping down in the browser window saying, "Hello!"?

Thanks, --Colin

2

You Prob forgot to include your js files

3

In my app/views/layouts/application.rhtml:

      <%= javascript_include_tag :defaults %>

4

Hi Colin,

Colin Summers wrote:

Fire up Mongrel on post 3000. It loads the index.rhtml file just file. Shows me the link which is coded like this:

   link_to_remote("Say hello",{:action => 'hello'})

then hello.rjs is just    page.alert "Hello!"

Okay, I'm missing the "world" part.

I load the first page and then click on the link. The log says: Processing JavaController#index

The action that you *intend* to be invoked by your link is 'hello'. According to the log you posted, clicking the link is *actually* invoking the 'index' action instead. The problem may lie in your coding of the link_to_remote. Check the page source of your 'index' view. It should have an Ajax call to 'java/hello'. If it doesn't, try changing your link_to_remote to:

link_to_remote("Say hello", :url =>{:action => 'hello'})

or even more readably...

link_to_remote("Say hello", :url =>{:controller => 'java', :action => 'hello'})

If you're page source already contains the Ajax request to 'java/hello', then the problem's in your routes.

HTH, Bill

5

Thanks Bill!

That worked. I had

   <%= link_to_remote("Say hello",{:action => 'hello'}) %>

and changed it to:

   <%= link_to_remote("Say hello", :url =>{:controller => 'java', :action => 'hello'}) %>

And now it works. That's mysterious to me. I thought the controller would be constant on a page served by that controller, but I guess not.

--Colin

6

Hi Colin,

Colin Summers wrote:

Thanks Bill!

You're welcome.

That worked. I had

   <%= link_to_remote("Say hello",{:action => 'hello'}) %>

and changed it to:

   <%= link_to_remote("Say hello", :url =>{:controller => 'java', :action => 'hello'}) %>

And now it works. That's mysterious to me. I thought the controller would be constant on a page served by that controller, but I guess not.

The problem was probably the lack of the ':url =>'.

The default controller for a view is, indeed, its 'own' controller. I recommended the addition of the ':controller' component just for readability; the link_to_remote can point to any controller. The code should still work fine if you take the controller pair out of the url hash.

Best regards, Bill