Changes method: displayed nil to blank change

rubyonrails-talk
1

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

2

Just filter out the ones where the two array entries are nil and "". Note that blank? will probably be useful here.

Colin

3

Colin Law wrote in post #971987:

Just filter out the ones where the two array entries are nil and "". Note that blank? will probably be useful here.

Colin

Thanks for reply. But how can I filter this one? Currently I am checking the field change and avoid nil to blank changes.

like if !obj.changes["address] != [nil,""]                ---More ----      end

Note: There are multiple fields to check.

Thanks Brijesh Shah

4

Run through the hash first removing items for which both elements of its array respond true to .blank? Have a look at Hash.delete_if for example.

Colin

5

Hi

Thanks Colin. This should works fine..

Thanks Brijesh Shah