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33 lines
902 B
Python
33 lines
902 B
Python
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import copy
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import jsonschema
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import jsonschema.validators
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# From https://github.com/Julian/jsonschema/blob/master/docs/faq.rst
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def extend_with_default(validator_class):
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validate_properties = validator_class.VALIDATORS["properties"]
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def set_defaults(validator, properties, instance, schema):
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for error in validate_properties(
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validator, properties, instance, schema,
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):
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yield error
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for property, subschema in properties.iteritems():
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if "default" in subschema:
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instance.setdefault(property, subschema["default"])
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return jsonschema.validators.extend(
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validator_class, {"properties" : set_defaults},
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)
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DefaultingValidator = extend_with_default(jsonschema.Draft4Validator)
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def apply_defaults(obj, schema):
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obj = copy.deepcopy(obj)
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DefaultingValidator(schema).validate(obj)
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return obj
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