diff --git a/django/db/models/fields/json.py b/django/db/models/fields/json.py
index d544caf3e501..e0aa5c622b0d 100644
--- a/django/db/models/fields/json.py
+++ b/django/db/models/fields/json.py
@@ -424,8 +424,12 @@ class KeyTextTransform(KeyTransform):
     output_field = TextField()
 
     def as_mysql(self, compiler, connection):
-        if connection.mysql_is_mariadb:
-            # MariaDB doesn't support -> and ->> operators (see MDEV-13594).
+        # The ->> operator is not supported on MariaDB (see MDEV-13594) and
+        # only supported against columns on MySQL.
+        if (
+            connection.mysql_is_mariadb
+            or getattr(self.lhs.output_field, "model", None) is None
+        ):
             sql, params = super().as_mysql(compiler, connection)
             return "JSON_UNQUOTE(%s)" % sql, params
         else:
diff --git a/django/views/generic/base.py b/django/views/generic/base.py
index 8412288be1ce..485b74d377bf 100644
--- a/django/views/generic/base.py
+++ b/django/views/generic/base.py
@@ -1,4 +1,5 @@
 import logging
+from urllib.parse import urlparse
 
 from asgiref.sync import iscoroutinefunction, markcoroutinefunction
 
@@ -252,7 +253,10 @@ def get_redirect_url(self, *args, **kwargs):
 
         args = self.request.META.get("QUERY_STRING", "")
         if args and self.query_string:
-            url = "%s?%s" % (url, args)
+            if urlparse(url).query:
+                url = f"{url}&{args}"
+            else:
+                url = f"{url}?{args}"
         return url
 
     def get(self, request, *args, **kwargs):
diff --git a/tests/generic_views/test_base.py b/tests/generic_views/test_base.py
index cc5dcf4e39d4..9d6cef8a4644 100644
--- a/tests/generic_views/test_base.py
+++ b/tests/generic_views/test_base.py
@@ -587,6 +587,31 @@ def test_gone_response_logged(self):
                     handler, f"Gone: {escaped}", logging.WARNING, 410, request
                 )
 
+    def test_redirect_with_querry_string_in_destination(self):
+        response = RedirectView.as_view(url="/bar/?pork=spam", query_string=True)(
+            self.rf.get("/foo")
+        )
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(response.headers["Location"], "/bar/?pork=spam")
+
+    def test_redirect_with_query_string_in_destination_and_request(self):
+        response = RedirectView.as_view(url="/bar/?pork=spam", query_string=True)(
+            self.rf.get("/foo/?utm_source=social")
+        )
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(
+            response.headers["Location"], "/bar/?pork=spam&utm_source=social"
+        )
+
+    def test_redirect_with_same_query_string_param_will_append_not_replace(self):
+        response = RedirectView.as_view(url="/bar/?pork=spam", query_string=True)(
+            self.rf.get("/foo/?utm_source=social&pork=ham")
+        )
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(
+            response.headers["Location"], "/bar/?pork=spam&utm_source=social&pork=ham"
+        )
+
 
 class GetContextDataTest(SimpleTestCase):
     def test_get_context_data_super(self):
diff --git a/tests/model_fields/test_jsonfield.py b/tests/model_fields/test_jsonfield.py
index 16ab8887a940..b16499d1980b 100644
--- a/tests/model_fields/test_jsonfield.py
+++ b/tests/model_fields/test_jsonfield.py
@@ -1160,6 +1160,12 @@ def test_lookups_with_key_transform(self):
                     True,
                 )
 
+    def test_cast_with_key_text_transform(self):
+        obj = NullableJSONModel.objects.annotate(
+            json_data=Cast(Value({"foo": "bar"}, JSONField()), JSONField())
+        ).get(pk=self.objs[0].pk, json_data__foo__icontains="bar")
+        self.assertEqual(obj, self.objs[0])
+
     @skipUnlessDBFeature("supports_json_field_contains")
     def test_contains_contained_by_with_key_transform(self):
         tests = [