[Dbix-class] Patch and test for failing with timezone and datetime_undef_if_invalid

[Matt S Trout]

On Sat, Sep 13, 2008 at 10:35:43PM +0200, Jens Gassmann wrote:
> hi,
> 
> attach the patch and test for handling timezone and 
> datetime_undef_if_invalid correctly.
> 
> Please be indulge with me and the result - if there any missing or wrong 
> with this first patch and test - please correct me.

After going through this on IRC, a slightly modified version of the patch
was applied.

Thanks!

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