[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,

tests/postgres_tests/test_array.py

@@ -6,7 +6,7 @@ import uuid
 from django import forms
 from django.contrib.postgres.fields import ArrayField
 from django.contrib.postgres.forms import SimpleArrayField, SplitArrayField
-from django.core import exceptions, serializers
+from django.core import exceptions, serializers, validators
 from django.core.management import call_command
 from django.db import IntegrityError, connection, models
 from django.test import TestCase, TransactionTestCase, override_settings
@@ -330,6 +330,14 @@ class TestValidation(TestCase):
         self.assertEqual(cm.exception.code, 'nested_array_mismatch')
         self.assertEqual(cm.exception.messages[0], 'Nested arrays must have the same length.')
 
+    def test_with_validators(self):
+        field = ArrayField(models.IntegerField(validators=[validators.MinValueValidator(1)]))
+        field.clean([1, 2], None)
+        with self.assertRaises(exceptions.ValidationError) as cm:
+            field.clean([0], None)
+        self.assertEqual(cm.exception.code, 'item_invalid')
+        self.assertEqual(cm.exception.messages[0], 'Item 0 in the array did not validate: Ensure this value is greater than or equal to 1.')
+
 
 class TestSimpleFormField(TestCase):