Ruby on Rails

Hi

Here I am trying to get the details of changed fields in update method

I got those fields by changes method. #obj.changes

But problem is that I got changes in following ways even when I am not
updating anything.

obj.changes
{"address"=>[nil, ""]}

This is what I don't want. I want only those changes which are text to
blank or blank to text or text to text..

Can anybody help me ?

Thanks
Brijesh Shah

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