Fixed #28950 -- Fixed ArrayField.has_changed() for empty values.

1 files changed, 10 insertions, 0 deletions

diff --git a/django/contrib/postgres/forms/array.py b/django/contrib/postgres/forms/array.py
index f01d5836c1..d9e3256e1f 100644
--- a/django/contrib/postgres/forms/array.py
+++ b/django/contrib/postgres/forms/array.py
@@ -91,6 +91,16 @@ class SimpleArrayField(forms.CharField):
         if errors:
             raise ValidationError(errors)
 
+    def has_changed(self, initial, data):
+        try:
+            value = self.to_python(data)
+        except ValidationError:
+            pass
+        else:
+            if initial in self.empty_values and value in self.empty_values:
+                return False
+        return super().has_changed(initial, data)
+
 
 class SplitArrayWidget(forms.Widget):
     template_name = 'postgres/widgets/split_array.html'