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

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/postgres_tests/test_array.py b/tests/postgres_tests/test_array.py
index 7686ea10a8..708852f71c 100644
--- a/tests/postgres_tests/test_array.py
+++ b/tests/postgres_tests/test_array.py
@@ -975,6 +975,26 @@ class TestSplitFormField(PostgreSQLSimpleTestCase):
                 form = Form(data, instance=obj)
                 self.assertIs(form.has_changed(), expected_result)
 
+    def test_splitarrayfield_remove_trailing_nulls_has_changed(self):
+        class Form(forms.ModelForm):
+            field = SplitArrayField(forms.IntegerField(), required=False, size=2, remove_trailing_nulls=True)
+
+            class Meta:
+                model = IntegerArrayModel
+                fields = ('field',)
+
+        tests = [
+            ({}, {'field_0': '', 'field_1': ''}, False),
+            ({'field': None}, {'field_0': '', 'field_1': ''}, False),
+            ({'field': []}, {'field_0': '', 'field_1': ''}, False),
+            ({'field': [1]}, {'field_0': '1', 'field_1': ''}, False),
+        ]
+        for initial, data, expected_result in tests:
+            with self.subTest(initial=initial, data=data):
+                obj = IntegerArrayModel(**initial)
+                form = Form(data, instance=obj)
+                self.assertIs(form.has_changed(), expected_result)
+
 
 class TestSplitFormWidget(PostgreSQLWidgetTestCase):