Refs #27808 -- Added test for saving nested ArrayField with nullable base field.

3 files changed, 14 insertions, 0 deletions

diff --git a/tests/postgres_tests/migrations/0002_create_test_models.py b/tests/postgres_tests/migrations/0002_create_test_models.py
index 1b9c45881f..0e36cd1256 100644
--- a/tests/postgres_tests/migrations/0002_create_test_models.py
+++ b/tests/postgres_tests/migrations/0002_create_test_models.py
@@ -96,6 +96,10 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                 ('field', ArrayField(models.IntegerField(), size=None, null=True, blank=True)),
+                (
+                    'field_nested',
+                    ArrayField(ArrayField(models.IntegerField(), size=None, null=True), size=None, null=True),
+                ),
             ],
             options={
                 'required_db_vendor': 'postgresql',
diff --git a/tests/postgres_tests/models.py b/tests/postgres_tests/models.py
index 5b2f41160a..2cf47b88c7 100644
--- a/tests/postgres_tests/models.py
+++ b/tests/postgres_tests/models.py
@@ -46,6 +46,7 @@ class IntegerArrayModel(PostgreSQLModel):
 
 class NullableIntegerArrayModel(PostgreSQLModel):
     field = ArrayField(models.IntegerField(), blank=True, null=True)
+    field_nested = ArrayField(ArrayField(models.IntegerField(null=True)), null=True)
 
 
 class CharArrayModel(PostgreSQLModel):
diff --git a/tests/postgres_tests/test_array.py b/tests/postgres_tests/test_array.py
index 708852f71c..379a1e9bba 100644
--- a/tests/postgres_tests/test_array.py
+++ b/tests/postgres_tests/test_array.py
@@ -31,6 +31,7 @@ try:
     from django.contrib.postgres.forms import (
         SimpleArrayField, SplitArrayField, SplitArrayWidget,
     )
+    from django.db.backends.postgresql.base import PSYCOPG2_VERSION
     from psycopg2.extras import NumericRange
 except ImportError:
     pass
@@ -140,6 +141,14 @@ class TestSaveLoad(PostgreSQLTestCase):
         self.assertEqual(field.model, IntegerArrayModel)
         self.assertEqual(field.base_field.model, IntegerArrayModel)
 
+    def test_nested_nullable_base_field(self):
+        if PSYCOPG2_VERSION < (2, 7, 5):
+            self.skipTest('See https://github.com/psycopg/psycopg2/issues/325')
+        instance = NullableIntegerArrayModel.objects.create(
+            field_nested=[[None, None], [None, None]],
+        )
+        self.assertEqual(instance.field_nested, [[None, None], [None, None]])
+
 
 class TestQuerying(PostgreSQLTestCase):