Adding automatic column calculation

rubyonrails-talk
1

Hi,

I want to add a column that would get calculated automatically whenever I update an object. For example, a checksum, of other columns in the model.

It should run whenever I do save, save!, update_attributes, etc.

Where would be a logical place to add this in my model?

Thanks, Helzer

2

before_save ?

Fred

3

class YourModel   def before_save     your callback code ...   end end

4

Thanks a lot Fred and alberto. I was just going to reinvent the wheel here...

Helzer