Rails - Jan 2011 - Changes method: displayed nil to blank change

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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On 3 January 2011 10:12, Brijesh Shah
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> 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..
Just filter out the ones where the two array entries are nil and "".
Note that blank? will probably be useful here.

Colin

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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

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On 3 January 2011 12:47, Brijesh Shah
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> 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.
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

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Hi

Thanks Colin. This should works fine..

Thanks
Brijesh Shah

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