# Which callback method should I use?

**URL:** <https://www.ruby-forum.com/t/which-callback-method-should-i-use/119165>\
**Category:** Rails\
**Created:** [November 4, 2007, 6:14am UTC](https://www.ruby-forum.com/t/which-callback-method-should-i-use/119165 "2007-11-04T06:14:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![desertfox](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/8491ac/32.png) [@desertfox](https://www.ruby-forum.com/u/desertfox)\
**Post date:** [November 4, 2007, 6:14am UTC](https://www.ruby-forum.com/t/which-callback-method-should-i-use/119165/1 "2007-11-04T06:14:34Z")

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Im uploading a file to a database table using the file\_column plugin. I  
also need to extract some info from that file and save it to the same  
table.  
Which callback method should I use?