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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: validation shouldn't fail when values contain array with null","articleBody":"### Actual Behavior\n\nThis issue is somewhat similar to #551, only with a list in the input (`{'names': [None]}` instead of `{'name': None}`), and this time `RecursionExceeded` is raised instead of `UnmarshallerError`.\n\n### Expected Behavior\n\nShould not raise an exception.\n\n### Steps to Reproduce\n\nHere's a test case, modelled after the one in #555 (that fixed #551). This also shows that somehow the issue is limited to the 3.0 code path, because it works just fine with 3.1\r\n\r\n```python\r\n    @pytest.mark.parametrize('factory', [\r\n        oas30_write_schema_unmarshallers_factory,\r\n        oas31_schema_unmarshallers_factory])\r\n    def test_object_with_array_of_null(self, factory):\r\n        schema = {}\r\n        spec = SchemaPath.from_dict(schema)\r\n        unmarshaller = factory.create(spec)\r\n        result = unmarshaller.unmarshal({'foo': [None]})\r\n        assert result == {'foo': [None]}\r\n```\n\n### OpenAPI Core Version\n\n0.19.0\n\n### OpenAPI Core Integration\n\npyramid-openapi3\n\n### Affected Area(s)\n\nunmarshalling\n\n### References\n\n_No response_\n\n### Anything else we need to know?\n\n_No response_\n\n### Would you like to implement a fix?\n\nNo","author":{"url":"https://github.com/wosc","@type":"Person","name":"wosc"},"datePublished":"2024-03-28T15:28:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/822/openapi-core/issues/822"}