Incorrect validation of valid payload with valid schema #1362
Description
I have a schema that heavily utilises $dynamicRef to inject parts of schema from other files.
Namely, here is the base schema:
base.json:
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "base.json", "type": "object", "additionalProperties": false, "properties": { "orderNumber": { "type": "integer", "minimum": 0 }, "downstreamNumber": { "$dynamicRef": "#specialDownstreamNumber" }, "schemaName": { "$dynamicRef": "#concreteName" }, "schemaVersion": { "$dynamicRef": "#concreteVersion" }, "timestamp": { "type": "integer" }, "data": { "$dynamicRef": "#concreteData" } }, "required": [ "data", "orderNumber", "schemaName", "schemaVersion", "downstreamNumber", "timestamp" ], "$defs": { "name": { "const": "base", "$dynamicAnchor": "concreteName" }, "version": { "const": "0.0.0", "$dynamicAnchor": "concreteVersion" }, "data": { "not": true, "$dynamicAnchor": "concreteData" }, "downstreamNumber": { "type": "integer", "minimum": 1, "$dynamicAnchor": "specialDownstreamNumber" } } }And here is the specific JSON that fills in the data for the base:
camera.json:
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "camera.json", "$ref": "base.json", "$defs": { "name": { "const": "camera.info", "$dynamicAnchor": "concreteName" }, "version": { "const": "1.0.0", "$dynamicAnchor": "concreteVersion" }, "data": { "$dynamicAnchor": "concreteData", "type": "object", "additionalProperties": false, "properties": { "cameraFacing": { "enum": [ "Front", "Back" ] }, "cameraFrameSize": { "$ref": "#/$defs/size" }, "roi": { "$ref": "#/$defs/size" }, "viewPortAspectRatio": { "type": "number" } }, "required": [ "cameraFacing", "cameraFrameSize", "roi", "viewPortAspectRatio" ] }, "downstreamNumber": { "type": "integer", "minimum": 0, "$dynamicAnchor": "specialDownstreamNumber" }, "size": { "type": "object", "additionalProperties": false, "properties": { "width": { "type": "integer" }, "height": { "type": "integer" } }, "required": [ "width", "height" ] } } }Here is the JSON that I'm trying to validate:
{ "orderNumber": 4, "downstreamNumber": 1, "schemaVersion": "1.0.0", "schemaName": "camera.info", "timestamp": 1756525700, "data": { "cameraFacing": "Back", "cameraFrameSize": { "width": 3841, "height": 2161 }, "roi": { "width": 3840, "height": 1858 }, "viewPortAspectRatio": 2.066 } }Here is how I'm doing the validation:
import json from pathlib import Path from jsonschema.validators import Draft202012Validator from referencing import Registry, Resource ROOT = Path(__file__).absolute().parent SCHEMAS = ROOT / Path("schema") def validate_file(validator: Draft202012Validator, file: Path): with open(file, "rt", encoding="utf-8") as f: instance = json.load(f) instance = json.loads(file.read_text()) print(f"Validating {file}...") validator.validate(instance) def retrieve_from_filesystem(uri: str): path = SCHEMAS / Path(uri) contents = json.loads(path.read_text()) return Resource.from_contents(contents) def main(): registry = Registry(retrieve=retrieve_from_filesystem) schema_file = SCHEMAS / Path("camera.json") with open(schema_file, "rt", encoding="utf-8") as f: schema = json.load(f) validator = Draft202012Validator( schema, registry=registry ) tests_path = ROOT / Path("payload") for file in tests_path.iterdir(): validate_file(validator, file) if __name__ == "__main__": main()The validation fails with exception:
jsonschema.exceptions._WrappedReferencingError: PointerToNowhere: '/$defs/size' does not exist within {'$schema': 'https://json-schema.org/draft/2020-12/schema', '$id': 'base.json', 'type': 'object', 'additionalProperties': False, 'properties': {'orderNumber': {'type': 'integer', 'minimum': 0}, 'downstreamNumber': {'$dynamicRef': '#specialDownstreamNumber'}, 'schemaName': {'$dynamicRef': '#concreteName'}, 'schemaVersion': {'$dynamicRef': '#concreteVersion'}, 'timestamp': {'type': 'integer'}, 'data': {'$dynamicRef': '#concreteData'}}, 'required': ['data', 'orderNumber', 'schemaName', 'schemaVersion', 'downstreamNumber', 'timestamp'], '$defs': {'name': {'const': 'base', '$dynamicAnchor': 'concreteName'}, 'version': {'const': '0.0.0', '$dynamicAnchor': 'concreteVersion'}, 'data': {'not': True, '$dynamicAnchor': 'concreteData'}, 'downstreamNumber': {'type': 'integer', 'minimum': 1, '$dynamicAnchor': 'specialDownstreamNumber'}}} Which is incorrect, as camera.json does contain /$defs/size. I've tried validating the payload with a different validator and it validates the payload successfully.
I don't see anything wrong with my schema definitions and boon has no problem validating the payload.
Is this a bug in jsonschema library or did I do something wrong and boon fails to detect it?