[1.8.x] Fixed #24373 -- Added run_validators to ArrayField.

Thanks to DavidMuller for the report.

Backport of c490e410af from master

django/contrib/postgres/fields/array.py

@@ -139,6 +139,18 @@ class ArrayField(Field):
                     code='nested_array_mismatch',
                 )
 
+    def run_validators(self, value):
+        super(ArrayField, self).run_validators(value)
+        for i, part in enumerate(value):
+            try:
+                self.base_field.run_validators(part)
+            except exceptions.ValidationError as e:
+                raise exceptions.ValidationError(
+                    string_concat(self.error_messages['item_invalid'], ' '.join(e.messages)),
+                    code='item_invalid',
+                    params={'nth': i},
+                )
+
     def formfield(self, **kwargs):
         defaults = {
             'form_class': SimpleArrayField,