Ruby detect if a column value has changed -


so have line:

if self.company_changed?

and works fine detects if company has changed on object. need know if database value has changed , not if value in memory has changed. tried this:

if :company_changed?

this seems work in debug mode when execute 1 line. if let run, fails in testing on infinite loop.

my question can used in ruby check see if column value has changed.

there excellent screencast on great ryan bates.


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