# Image Rendering Problem

**URL:** <https://www.ruby-forum.com/t/image-rendering-problem/174769>\
**Category:** Rails\
**Created:** [September 2, 2009, 12:38am UTC](https://www.ruby-forum.com/t/image-rendering-problem/174769 "2009-09-02T00:38:28Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Dewyn](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/898d66/32.png) [@Dewyn](https://www.ruby-forum.com/u/Dewyn)\
**Post date:** [September 2, 2009, 12:38am UTC](https://www.ruby-forum.com/t/image-rendering-problem/174769/1 "2009-09-02T00:38:28Z")

</div>

Here’s the rundown of the problem that I’m having:

I have a page that I am rendering that has multiple icons being  
displayed. The icons are being stored as binary files in the database.  
When I load the page with a collection of items (icons) to be  
displayed, not all of the icons are being displayed. In fact, the  
icons which actually get displayed seem a bit random.

From the main html file, a partial is called for each of the items:

```
<% if @new_items -%>
  <ol>
    <li><%= render :partial => 'shared/item', :collection =>

```

@new\_items, :spacer\_template =\> ‘shared/li’ %\>  
  
\<% end -%\>

Inside the partial, each image is rendered with the following code:

```
<img src="<%= url_for(:action => 'get_icon', :id => item.id) %>"

```

alt=“Unable to Display” class=“uas-app-icon-link”/\>

The get\_icon method is just a function which contains the following:

```
def get_icon
    item = ItemDocument.find(:all, :conditions => ["item_id == ?

```

AND  
id == (SELECT  
icon\_id  
FROM  
items  
WHERE  
id == ?)",  
params[:id],  
params[:id]])  
icon = item[0]  
send\_data(icon.file,  
:type =\> icon.content\_type, :disposition =\>  
“inline”)  
end

Anyways, only some of that actual images are actually rendered when  
the page is complete. I checked to see whether the urls exist for each  
image, and all of the image urls are fine; they render just as they  
should. I have tried using both WEBrick and Mongrel in my server  
configuration of the localhost. WEBrick is a bit better, but both of  
them still fail to some extent. The server log for WEBrick is the  
following:

```
Processing ApplicationController#get_icon (for 127.0.0.1 at

```

2009-09-01 15:45:05) [GET]  
Parameters: {“id”=\>“2”}

```
ArgumentError (A copy of ApplicationController has been removed

```

from the module tree but is still active!):  
app/controllers/application\_controller.rb:15:in `initialize' C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in`service’  
C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in  
`run' C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:173:in`start\_thread’  
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:162:in  
`start' C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:162:in`start\_thread’  
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:95:in  
`start' C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:92:in`each’  
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:92:in  
`start' C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:23:in`start’  
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:82:in  
`start' -e:1:in`load’  
-e:1

```
Rendered rescues/_trace (47.0ms)
Rendered rescues/_request_and_response (2.0ms)
Rendering rescues/layout (internal_server_error)

```

Currently I am using sqlite3 v3.6.17 (gem) and rails v2.3.3 if that  
helps any. I did try making a quick temporary project that did the  
same kind of rendering with send\_data and an iterating partial call,  
and it has the same behavior. I tried using both sqlite and mysql  
v5.0.85 (v2.8.1 gem), and the results were the same. Any help at this  
point would be greatly appreciated. I am a beginner just to let you  
know, just FYI for those who might be able to help out. Thanks in  
advance.