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Diffstat (limited to 'docs/ref')
| -rw-r--r-- | docs/ref/models/constraints.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/ref/models/constraints.txt b/docs/ref/models/constraints.txt index d0a9a017dc..8134a657d8 100644 --- a/docs/ref/models/constraints.txt +++ b/docs/ref/models/constraints.txt @@ -102,6 +102,15 @@ specifies the check you want the constraint to enforce. For example, ``CheckConstraint(check=Q(age__gte=18), name='age_gte_18')`` ensures the age field is never less than 18. +.. admonition:: Oracle + + Checks with nullable fields on Oracle must include a condition allowing for + ``NULL`` values in order for :meth:`validate() <BaseConstraint.validate>` + to behave the same as check constraints validation. For example, if ``age`` + is a nullable field:: + + CheckConstraint(check=Q(age__gte=18) | Q(age__isnull=True), name='age_gte_18') + .. versionchanged:: 4.1 The ``violation_error_message`` argument was added. |