# Image uploading - upload\_column

**URL:** <https://www.ruby-forum.com/t/image-uploading-upload-column/164117>\
**Category:** Rails\
**Created:** [March 28, 2009, 3:24am UTC](https://www.ruby-forum.com/t/image-uploading-upload-column/164117 "2009-03-28T03:24:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![indu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/eada6e/32.png) [@indu](https://www.ruby-forum.com/u/indu)\
**Post date:** [March 28, 2009, 3:24am UTC](https://www.ruby-forum.com/t/image-uploading-upload-column/164117/1 "2009-03-28T03:24:15Z")

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Hai  
I am using upload\_column for uploading images. Trying to do the user  
registration. For the first time when the user tries to upload image it  
works fine. But when try to update the image an error  
undefined method `process!’ for #UploadColumn::UploadedFile:0x6838424  
occurs.  
in my view I set the :multipart=\>true.  
and in controller in the edit action @user = User.find(params[:id])  
and in update action @user.update\_attributes(params[:user]). Do I need  
to add anything more?  
Please help , thanks in advance

---

<div class="post-metadata">

**Author:** ![indu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/eada6e/32.png) [@indu](https://www.ruby-forum.com/u/indu)\
**Post date:** [March 29, 2009, 7:18am UTC](https://www.ruby-forum.com/t/image-uploading-upload-column/164117/2 "2009-03-29T07:18:28Z")

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Indu RS wrote:

> Hai  
> I am using upload\_column for uploading images. Trying to do the user  
> registration. For the first time when the user tries to upload image it  
> works fine. But when try to update the image an error  
> undefined method `process!’ for #UploadColumn::UploadedFile:0x6838424  
> occurs.  
> in my view I set the :multipart=\>true.  
> and in controller in the edit action @user = User.find(params[:id])  
> and in update action @user.update\_attributes(params[:user]). Do I need  
> to add anything more?  
> Please help , thanks in advance  
> The above problem was solved by installing RMagick, and then only we can  
> specify versions like thumb, large in model.rb file. If we haven’t  
> installed rmagick properly the error will occur at the time when we are  
> trying to change the image uplaoded (ie at the time of editing).