Fixed #34539 -- Restored get_prep_value() call when adapting JSONFields.

Regression in 5c23d9f0c32f166c81ecb6f3f01d5077a6084318.

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/model_fields/test_jsonfield.py b/tests/model_fields/test_jsonfield.py
index 60357d87b2..4a1cc075b4 100644
--- a/tests/model_fields/test_jsonfield.py
+++ b/tests/model_fields/test_jsonfield.py
@@ -103,6 +103,29 @@ class TestMethods(SimpleTestCase):
         with self.assertRaisesMessage(TypeError, msg):
             KeyTransformTextLookupMixin(transform)
 
+    def test_get_prep_value(self):
+        class JSONFieldGetPrepValue(models.JSONField):
+            def get_prep_value(self, value):
+                if value is True:
+                    return {"value": True}
+                return value
+
+        def noop_adapt_json_value(value, encoder):
+            return value
+
+        field = JSONFieldGetPrepValue()
+        with mock.patch.object(
+            connection.ops, "adapt_json_value", noop_adapt_json_value
+        ):
+            self.assertEqual(
+                field.get_db_prep_value(True, connection, prepared=False),
+                {"value": True},
+            )
+            self.assertIs(
+                field.get_db_prep_value(True, connection, prepared=True), True
+            )
+            self.assertEqual(field.get_db_prep_value(1, connection, prepared=False), 1)
+
 
 class TestValidation(SimpleTestCase):
     def test_invalid_encoder(self):