[4.0.x] Fixed #33335 -- Made model validation ignore functional unique constraints.

Regression in 3aa545281e0c0f9fac93753e3769df9e0334dbaa.

Thanks Hervé Le Roy for the report.

Backport of 1eaf38fa87384fe26d1abf6e389d6df1600d4d8c from main

1 files changed, 5 insertions, 1 deletions

diff --git a/django/db/models/options.py b/django/db/models/options.py
index 4028e05b99..41d79e2f9b 100644
--- a/django/db/models/options.py
+++ b/django/db/models/options.py
@@ -870,7 +870,11 @@ class Options:
         return [
             constraint
             for constraint in self.constraints
-            if isinstance(constraint, UniqueConstraint) and constraint.condition is None
+            if (
+                isinstance(constraint, UniqueConstraint) and
+                constraint.condition is None and
+                not constraint.contains_expressions
+            )
         ]
 
     @cached_property