Re: unique_together doesn't work

On Mon, Jul 4, 2011 at 10:43 AM, Szabo, Patrick (LNG-VIE)
<patrick.szabo@lexisnexis.at> wrote:
> Hi,
>
> Sry, i was a little bit unclear.
> Of course i tried to store identical entries (all fields have the same values) and i had no problem doing so.  Since most of the files i want to check for can be null i only inputet a titel.
>
>

It might have been nice for you to give this example straight up
(although you haven't actually specified the case clearly, I'm still
just guessing).

So you are creating objects, and 3 of the fields that you have said
are unique_together are undefined, and have Null=True in their field
definition? In databases, NULL is not equal to anything, even NULL.
Eg, NULL == NULL is false.

Therefore, 2 rows in the database with the same title, but with NULL
for the other 3 fields in the unique index, would not be considered as
the same row.

Tom

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