Fixed #30907 -- Fixed SplitArrayField.has_changed() with removal of empty trailing values.

1 files changed, 11 insertions, 0 deletions

diff --git a/django/contrib/postgres/forms/array.py b/django/contrib/postgres/forms/array.py
index d16a51c2e7..2e19cd574a 100644
--- a/django/contrib/postgres/forms/array.py
+++ b/django/contrib/postgres/forms/array.py
@@ -221,3 +221,14 @@ class SplitArrayField(forms.Field):
         if errors:
             raise ValidationError(list(chain.from_iterable(errors)))
         return cleaned_data
+
+    def has_changed(self, initial, data):
+        try:
+            data = self.to_python(data)
+        except ValidationError:
+            pass
+        else:
+            data, _ = self._remove_trailing_nulls(data)
+            if initial in self.empty_values and data in self.empty_values:
+                return False
+        return super().has_changed(initial, data)