# Url\_for\_file\_column not works

**URL:** <https://www.ruby-forum.com/t/url-for-file-column-not-works/124478>\
**Category:** Rails\
**Created:** [December 29, 2007, 1:15am UTC](https://www.ruby-forum.com/t/url-for-file-column-not-works/124478 "2007-12-29T01:15:46Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![stratboy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/838e76/32.png) [@stratboy](https://www.ruby-forum.com/u/stratboy)\
**Post date:** [December 29, 2007, 1:15am UTC](https://www.ruby-forum.com/t/url-for-file-column-not-works/124478/1 "2007-12-29T01:15:46Z")

</div>

I am using the file column plugin.

If i upload an image it works correctly but if i want to show an image  
it not works.

in my template i insert

url\_for\_file\_column(@core, “image”, “thumb”)

but return “”

i tried to print @core.image but it is set to nil.

My model is this:

class Core \< ActiveRecord::Base  
has\_one :forum\_topic  
has\_many :votes  
has\_many :forum\_messages ,:through =\> :forum\_topic  
attr\_accessible :site,:descriptionm,:image  
file\_column :image,:magick=\>{  
:geometry=\>‘600x600\>’,:attributes =\> { :quality =\> 60 },  
:versions =\> {  
:thumb =\> {:crop =\> “1:1”, :geometry =\>“30x30”,:attributes =\> {  
:quality =\> 50 } },  
:thumb\_big=\>{:crop =\> “1:1”, :geometry =\>“62x62”,:attributes =\>  
{ :quality =\> 50 } }  
}  
}  
}

How i can do?  
Thanks

---

<div class="post-metadata">

**Author:** ![stratboy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/838e76/32.png) [@stratboy](https://www.ruby-forum.com/u/stratboy)\
**Post date:** [December 29, 2007, 11:25am UTC](https://www.ruby-forum.com/t/url-for-file-column-not-works/124478/2 "2007-12-29T11:25:41Z")

</div>

I have noted that if i do it:  
url\_for\_file\_column(Core.find(cores.id), “image”)  
it works.

but if i use url\_for\_file\_column in a template called with:

\<%=render(:partial =\>  
“what”,:collection=\>Core.find(:all,:conditions=\>“id\<10”))%\>

and content:  
url\_for\_file\_column(what, “image”)

it not works.  
Why?