Rails - Feb 2006 - Idiomatic way to change partial''s behavior based on caller

Guys,

I have a partial that is shared by many controllers, and this partial  
has a link that needs to do different things based on which controller  
calls it.

So, the partial looks like this:
<!-- _part.rhtml -->
<tr>
  <td><%=part.number%></td>
  <td><%=part.associated_part_number%></td>
  <td><%=part.drawings%></td>
  <td><%=link_to "Choose this part",
{:action=>"choose_part",
:id=>part.id}, :confirm=>"Are you sure?"%></td>
</tr>

What I''d like to do is change the link_to to be dynamic, and allow the
controller to set values to pass to the partial. I can see this working  
in two ways, A: leave the link_to call there, but replace the paramters  
with variables that the controller populate, or B: allow the controllers  
to specify what appears in the fourth <td/> entirely, which is in my  
mind preferred.

What is the idiomatic way of doing this? Is A my only option, or can you  
think of a way to do B?

Thanks in advance, as always!

John




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Hi John,

render :partial => ''part'', :locals => { :inner_td =>
''stuff_inside_the_td'' }

then

<td><%= inner_td %></td> in the template

or

render :partial => ''part'', :locals => { :action =>
''choose'', :id => id,
:confirm => ''really?'' }

and you can see how to fill in the link_to vars from above.

Both are fine solutions depending on your needs.

Cheers,

-San

John Wells wrote:
> Guys,
> 
> I have a partial that is shared by many controllers, and this partial  
> has a link that needs to do different things based on which controller  
> calls it.
> 
> So, the partial looks like this:
> <!-- _part.rhtml -->
> <tr>
>   <td><%=part.number%></td>
>   <td><%=part.associated_part_number%></td>
>   <td><%=part.drawings%></td>
>   <td><%=link_to "Choose this part",
{:action=>"choose_part",
> :id=>part.id}, :confirm=>"Are you sure?"%></td>
> </tr>
> 
> What I''d like to do is change the link_to to be dynamic, and allow
the
> controller to set values to pass to the partial. I can see this working  
> in two ways, A: leave the link_to call there, but replace the paramters  
> with variables that the controller populate, or B: allow the controllers  
> to specify what appears in the fourth <td/> entirely, which is in my
> mind preferred.
> 
> What is the idiomatic way of doing this? Is A my only option, or can you  
> think of a way to do B?
> 
> Thanks in advance, as always!
> 
> John
> 
> 
> 
>

On Wednesday, February 08, 2006, at 2:43 PM, San wrote:
>Hi John,
>
>render :partial => ''part'', :locals => { :inner_td
=>
>''stuff_inside_the_td'' }
Hi San...thanks for the response.

What I''m curious about though, and I''m not at my code or
I''d give it a
shot: how can you make :inner_td contain code that would be valid inside  
the erb, such as link_to''s or form_tag''s, etc etc. Does this
require a
call to eval within the erb?

Thanks for the help!

John

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