Rails - Jun 2006 - How do I wrap a <%= link to %> around an image?

I''ve got a bunch of dynamically generated link paths that I want to use
to link some dynamically-generated image paths. Specifically, I want to 
link thumbnails in a gallery to the larger images.
But I''m stymied by Rails'' syntax. I can''t figure out
how to do this.

I tried this:

 <%= link_to(image_tag("../../images/photos/photo.photogroup/TN_ 
photo.photogroup photo.filenumber .jpg"),
"http://www.example.com") %>

But of course, all of the variables are being translated into HTML 
literally instead of coughing up their values, so that''s no good.

So I tried this:

<%= link_to "something", {:action =>
''show_album'', :album => @albumid,
:photo => photo.filenumber} %>
<img src="../../images/photos/<%= photo.photogroup %>/TN_<%= 
photo.photogroup %><%= photo.filenumber %>.jpg" alt="<%= 
photo.description %>">

Which works well, except that the best I can have with this is a text 
link NEXT to an image, when what I really want is the image to BE the 
link.

Anybody know how to do this?

TIA
sean

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Enclose the vars in #{}, e.g.

<%= 
link_to(image_tag("../../images/photos/#{photo.photogroup}/TN_#{photo.photogroup}#{photo.filenumber}.jpg"),
"http://www.example.com") %>

Joe

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> From: sean colquhoun <seancolquhoun@gk-a.com>
> I''ve got a bunch of dynamically generated link paths that I 
> want to use 
> to link some dynamically-generated image paths. Specifically, 
> I want to 
> link thumbnails in a gallery to the larger images.
> But I''m stymied by Rails'' syntax. I can''t figure
out how to do this.
> 
> I tried this:
> 
>  <%= link_to(image_tag("../../images/photos/photo.photogroup/TN_ 
> photo.photogroup photo.filenumber .jpg"),
"http://www.example.com") %>
> 
> But of course, all of the variables are being translated into HTML 
> literally instead of coughing up their values, so that''s no good.
> 
> So I tried this:
> 
> <%= link_to "something", {:action =>
''show_album'', :album =>
> @albumid, 
> :photo => photo.filenumber} %>
> <img src="../../images/photos/<%= photo.photogroup
%>/TN_<%=
> photo.photogroup %><%= photo.filenumber %>.jpg"
alt="<%=
> photo.description %>">
> 
> Which works well, except that the best I can have with this is a text 
> link NEXT to an image, when what I really want is the image to BE the 
> link.

Well from the code sample it looks like u need some string formatting.
Try doing

 <%= link_to(image_tag("../../images/photos/#{photo.photogroup}/TN_ 
#{photo.photogroup) #{photo.filenumber}.jpg"),
"http://www.example.com")
%>

This should see u through. 

Bharat

Thanks Joe! That worked great for the variables. Unfortunately, I still 
can''t link to functions ? only static URIs. Rails keeps throwing me 
errors when I try to do something like this:

<%= link_to 
(image_tag("../../images/photos/#{photo.photogroup}/TN_#{photo.photogroup}#{photo.filenumber}.jpg"),
{:action => ''show_album'', :album => @albumid, :photo
=>
photo.filenumber} %>

Is my syntax off or is this just something you can''t do?

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sean colquhoun wrote:
> Thanks Joe! That worked great for the variables. Unfortunately, I still 
> can''t link to functions ? only static URIs. Rails keeps throwing
me
> errors when I try to do something like this:
> 
> <%= link_to 
>
(image_tag("../../images/photos/#{photo.photogroup}/TN_#{photo.photogroup}#{photo.filenumber}.jpg"),
> {:action => ''show_album'', :album => @albumid,
:photo =>
> photo.filenumber} %>
> 
> Is my syntax off or is this just something you can''t do?
What errors - like ''missing parenthesis''? Your code is missing
a closing
one at the end, for link_to.

Joe

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WOOHOO!

Thanks Joe!

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On Tue, 6 Jun 2006 08:14:51 +0200, sean colquhoun wrote:
> Anybody know how to do this?
I suppose I did not understand your problem.

image_tag(source, options = {})
Returns an image tag converting the options into html options on the 
tag, but with these special cases:
<snip>
The src can be supplied as a?
	?	full path, like "/my_images/image.gif"
	?	file name, like "rss.gif", that gets expanded to
"/images/rss.gif"
	?	file name without extension, like "logo", that gets expanded to 
"/images/logo.png"

You can pass image_tag a full path. That is a ruby string... so you can 
do everything you would do with ruby strings (and in particular use the 
#{} ).

Combining this you should do something like:

link_to (
	image_tag 
("../../images/photos/#{photo.photogroup}"/TN_#{photo.photogroup}#{photo.filenumber}.jpg"),
	{:action => ''show_album'', :album => @albumid, 
:photo => photo.filenumber}
	)

Thanks Enrico! That''s pretty much what I ended up doing. My difficulty,
since I''m still quite the novice at this (and I expect I will be for 
some time) was more from having to guess at how to combine the two 
items, since there was no example of something like that in the API.

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On Tue, 6 Jun 2006 11:20:46 +0200, sean colquhoun wrote:
> Thanks Enrico! That''s pretty much what I ended up doing. My
difficulty,
> since I''m still quite the novice at this (and I expect I will be
for
> some time) was more from having to guess at how to combine the two 
> items, since there was no example of something like that in the API.
Well.. I didn''t notice a solution had already been posted. I''d
suggest
you should also consider learning some ruby as a language. Many things 
become clearer if you know ruby.