#31835: JSONField's __cointains lookup doesn't work in nested values on Oracle.
-------------------------------------+-------------------------------------
Reporter: felixxm | Owner: felixxm
Type: Bug | Status: assigned
Component: Database | Version: 3.1
layer (models, ORM) |
Severity: Release | Keywords:
blocker |
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Oracle 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"''.
It looks that building multi-level/recursive filters with `JSON_EXISTS()`
is the only feasible way, but it's really complicated and can be clunky.
I think we should drop this lookup on Oracle and raise
`NotSupportedError`.
Some examples:
{{{
diff --git a/tests/model_fields/test_jsonfield.py
b/tests/model_fields/test_jsonfield.py
index 3ce7fc51a9..b659675ec8 100644
--- a/tests/model_fields/test_jsonfield.py
+++ b/tests/model_fields/test_jsonfield.py
@@ -445,8 +445,12 @@ 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]]),
+ ({'d': [{'f': 'g'}]}, [self.objs[4]]),
([1, [2]], [self.objs[5]]),
({'n': [None]}, [self.objs[4]]),
({'j': None}, [self.objs[4]]),
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/31835>
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