Rails - Apr 2007 - Getting an index of an element rendered in partial

Hi!

I''ve got a sorted array of elements. I render the whole array in one
place, but also the three first elements in another using the following
command:

"render :partial => ''partial'', :collection =>
@first_elements"

The problem is that I also need an index of every element in the array
inside the partial (to correctly create a link to it). Is there a way to
somehow determine an index of an element inside the partial or maybe to
somehow pass it along as separate variable?

Thanks in advance

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On Apr 25, 2007, at 1:59 PM, Szymon Nowak wrote:
> Hi!
>
> I''ve got a sorted array of elements. I render the whole array in
one
> place, but also the three first elements in another using the  
> following
> command:
>
> "render :partial => ''partial'', :collection =>
@first_elements"
>
> The problem is that I also need an index of every element in the array
> inside the partial (to correctly create a link to it). Is there a  
> way to
> somehow determine an index of an element inside the partial or  
> maybe to
> somehow pass it along as separate variable?
>
> Thanks in advance
The index of the element in the collection for :partial =>
''foo'' is a
local variable foo_counter available within the partial.

However, you might consider using the element''s id as the basis for  
linking.

Also, you could render :partial => ''partial'', :collection
=>
@elements.first(3)

You can also pass arbitrary variables into a partial with :locals =>  
{ :bar => ''iron'' } which makes a local named bar available
to the
partial with a value of ''iron''.

If you have the Agile Web Development with Rails, 2nd ed., see Ch.22:  
Action View, "Layouts and Components" pp.509-511 (PDF pp.510-512).

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob-xa9cJyRlE0mWcWVYNo9pwxS2lgjeYSpx@public.gmane.org

I can''t use IDs, because the table is sorted by values from another 
column and I need to paginate through this sorted table. But the 
foo_counter is exactly what I need.

Thank you very much!

Rob Biedenharn wrote:
> On Apr 25, 2007, at 1:59 PM, Szymon Nowak wrote:
>> inside the partial (to correctly create a link to it). Is there a  
>> way to
>> somehow determine an index of an element inside the partial or  
>> maybe to
>> somehow pass it along as separate variable?
>>
>> Thanks in advance
> 
> The index of the element in the collection for :partial =>
''foo'' is a
> local variable foo_counter available within the partial.
> 
> However, you might consider using the element''s id as the basis
for
> linking.
> 
> Also, you could render :partial => ''partial'',
:collection =>
> @elements.first(3)
> 
> You can also pass arbitrary variables into a partial with :locals =>
> { :bar => ''iron'' } which makes a local named bar
available to the
> partial with a value of ''iron''.
> 
> If you have the Agile Web Development with Rails, 2nd ed., see Ch.22:
> Action View, "Layouts and Components" pp.509-511 (PDF
pp.510-512).
> 
> -Rob
> 
> Rob Biedenharn    http://agileconsultingllc.com
> Rob-xa9cJyRlE0mWcWVYNo9pwxS2lgjeYSpx@public.gmane.org

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