django/tests/regressiontests
Anssi Kääriäinen 09fcb70c80 Fixed empty strings + to_field regression on Oracle
Querying the reverse side of nullable to_field relation, where both
sides can contain null values resulted in incorrect results. The reason
was not detecting '' as NULL.

Refs #17541
2013-02-23 00:05:31 +02:00
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