# Add to Current Value in DB

**URL:** <https://www.ruby-forum.com/t/add-to-current-value-in-db/104712>\
**Category:** Rails\
**Created:** [May 21, 2007, 8:28pm UTC](https://www.ruby-forum.com/t/add-to-current-value-in-db/104712 "2007-05-21T20:28:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![valeriem](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/ecccb3/32.png) [@valeriem](https://www.ruby-forum.com/u/valeriem)\
**Post date:** [May 21, 2007, 8:28pm UTC](https://www.ruby-forum.com/t/add-to-current-value-in-db/104712/1 "2007-05-21T20:28:50Z")

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I have a column in my database called activity\_value and activity\_time  
for a blogging system

How do I add to the current value in a field. ex active\_value =  
value.current + @new\_value

I could do this easily in PHP but not rails