id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
31836	JSONField's __contains and __contained_by lookups don't work with nested values on SQLite.	Mariusz Felisiak	Mariusz Felisiak	"SQLite doesn't provide a native way for testing containment of `JSONField`. The current implementation works only for basic examples without supporting nested structures and doesn't follow ''""the general principle that the contained object must match the containing object as to structure and data contents, possibly **after discarding some non-matching array elements** or **object key/value pairs** from the containing object""''.

I'm not sure if it's feasible to emulate it in Python.

Some (not really complicated) examples that don't work:
{{{
diff --git a/tests/model_fields/test_jsonfield.py b/tests/model_fields/test_jsonfield.py
index 9a9e1a1286..1acc5af73e 100644
--- a/tests/model_fields/test_jsonfield.py
+++ b/tests/model_fields/test_jsonfield.py
@@ -449,9 +449,14 @@ class TestQuerying(TestCase):
         tests = [
             ({}, self.objs[2:5] + self.objs[6:8]),
             ({'baz': {'a': 'b', 'c': 'd'}}, [self.objs[7]]),
+            ({'baz': {'a': 'b'}}, [self.objs[7]]),
+            ({'baz': {'c': 'd'}}, [self.objs[7]]),
             ({'k': True, 'l': False}, [self.objs[6]]),
             ({'d': ['e', {'f': 'g'}]}, [self.objs[4]]),
+            ({'d': ['e']}, [self.objs[4]]),
             ([1, [2]], [self.objs[5]]),
+            ([1], [self.objs[5]]),
+            ([[2]], [self.objs[5]]),
             ({'n': [None]}, [self.objs[4]]),
             ({'j': None}, [self.objs[4]]),
         ]
}}}"	Bug	closed	Database layer (models, ORM)	3.1	Release blocker	fixed		Sage Abdullah	Ready for checkin	1	0	0	0	0	0