Rails - Mar 2006 - Additional link tag attributes with link_to_function...

Hi,

I''m having a bit of a struggle with link_to_remote. Everything works 
exactly as I want it, but the problem is that I want to add another 
attribute to the <a>-tag, namely class="". Long story short, I
want
specific links to look differently from others, but all of them being 
link_to_function. Normally, I''d do this with adding a
class="foo" to
certain links and specifying the look with css, but I''m unsure how to
do
this with Rails.

Currently, I have:

<%= link_to_remote("foo",
          :update => ''some-id'',
          :url => { :action => :someaction, :params => { :parameter
=>
"value" }},
          :loading => "Element.hide(''some-id'')",
          :complete => visual_effect(:appear, ''some-id''))
%>

which generates

<a href="#" onclick="new
Ajax.Updater(''some-id'',
''/controller/someaction?parameter=value'', {asynchronous:true, 
evalScripts:true, onComplete:function(request){new 
Effect.Appear(''some-id'',{});}, 
onLoading:function(request){Element.hide(''some-id'')}}); return
false;">foo</a>

, just as it should. Basically, I wish to extend this to:

<a href="#" class="bar" onclick="new
Ajax.Updater(''some-id'',
''/controller/someaction?parameter=value'', {asynchronous:true, 
evalScripts:true, onComplete:function(request){new 
Effect.Appear(''some-id'',{});}, 
onLoading:function(request){Element.hide(''some-id'')}}); return
false;">foo</a>

, but have no idea how to add the class-attribute. I''m *guessing* this 
might be related to html_options = {} in the link_to_function method, 
but documentation is non-existant.

Of course, I *could* work around this by using:

<span class="foo"><a
href="#">bar</a></span>

and then use

.class a{ stuff; }

in my css, but I don''t want to do that if I can help it.

Is there a way?

Thanks in advance,

Sebastian

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

On Mar 18, 2006, at 21:05, Sebastian Conrad wrote:
> I''m having a bit of a struggle with link_to_remote. Everything
works
> exactly as I want it, but the problem is that I want to add another
> attribute to the <a>-tag, namely class="". Long story
short, I want
> specific links to look differently from others, but all of them being
> link_to_function. Normally, I''d do this with adding a
class="foo" to
> certain links and specifying the look with css, but I''m unsure how
> to do
> this with Rails.
As you correctly guessed this has to do with html_options.

The signature of link_to_remote is

   link_to_remote(name, options = {}, html_options = {})

and in Rails is important to understand what that implies because it  
is used often, this comes from Ruby itself.

That method receives 3 parameters, two of them, the rightmost ones,  
have default values. In the case of hashes Ruby does a bit of  
syntactic sugar to dispense the curlies, so:

   link_to_remote(''foo'', :a => 3, :b => 1)

is equivalent to

   link_to_remote(''foo'', {:a => 3, :b => 1}, {})

so trailing pairs are magically converted into the second positional  
hash parameter. That''s Ruby, not Rails.

Now, to be able to pass options to html_options you need to make  
"options" explicitly as a true hash:

   link_to_remote(''foo'', {:a => 3, :b => 1}, :class
=> ''my_css_class'')

That way trailing pais are grouped as html_options, and you get the  
class attribute generated by the helper.

-- fxn

Xavier Noria wrote:
>    link_to_remote(''foo'', :a => 3, :b => 1)
> 
> is equivalent to
> 
>    link_to_remote(''foo'', {:a => 3, :b => 1}, {})
> 
> so trailing pairs are magically converted into the second positional
> hash parameter. That''s Ruby, not Rails.
> 
> Now, to be able to pass options to html_options you need to make
> "options" explicitly as a true hash:
> 
>    link_to_remote(''foo'', {:a => 3, :b => 1}, :class
=> ''my_css_class'')
Awesome, thanks. I knew the answer would be simple, but it escaped me 
somehow. Thanks again!

- Sebastian

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