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40 lines
1.6 KiB
Python
40 lines
1.6 KiB
Python
from voluptuous import Invalid, MultipleInvalid
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from voluptuous.error import Error
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MAX_VALIDATION_ERROR_ITEM_LENGTH = 500
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def _nested_getitem(data, path):
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for item_index in path:
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try:
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data = data[item_index]
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except (KeyError, IndexError, TypeError):
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# The index is not present in the dictionary, list or other
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# indexable or data is not subscriptable
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return None
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return data
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def humanize_error(data, validation_error, max_sub_error_length=MAX_VALIDATION_ERROR_ITEM_LENGTH):
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""" Provide a more helpful + complete validation error message than that provided automatically
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Invalid and MultipleInvalid do not include the offending value in error messages,
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and MultipleInvalid.__str__ only provides the first error.
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"""
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if isinstance(validation_error, MultipleInvalid):
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return '\n'.join(sorted(
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humanize_error(data, sub_error, max_sub_error_length)
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for sub_error in validation_error.errors
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))
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else:
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offending_item_summary = repr(_nested_getitem(data, validation_error.path))
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if len(offending_item_summary) > max_sub_error_length:
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offending_item_summary = offending_item_summary[:max_sub_error_length - 3] + '...'
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return '%s. Got %s' % (validation_error, offending_item_summary)
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def validate_with_humanized_errors(data, schema, max_sub_error_length=MAX_VALIDATION_ERROR_ITEM_LENGTH):
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try:
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return schema(data)
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except (Invalid, MultipleInvalid) as e:
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raise Error(humanize_error(data, e, max_sub_error_length))
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