mirror of
https://github.com/HackSoftware/Django-Styleguide.git
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61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
from rest_framework import serializers
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from rest_framework import exceptions as rest_exceptions
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from django.core.exceptions import ValidationError
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def create_serializer_class(name, fields):
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return type(name, (serializers.Serializer, ), fields)
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def inline_serializer(*, fields, data=None, **kwargs):
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serializer_class = create_serializer_class(name='', fields=fields)
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if data is not None:
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return serializer_class(data=data, **kwargs)
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return serializer_class(**kwargs)
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def get_first_matching_attr(obj, *attrs, default=None):
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for attr in attrs:
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if hasattr(obj, attr):
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return getattr(obj, attr)
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return default
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def get_error_message(exc):
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if hasattr(exc, 'message_dict'):
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return exc.message_dict
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error_msg = get_first_matching_attr(exc, 'message', 'messages')
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if isinstance(error_msg, list):
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error_msg = ', '.join(error_msg)
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if error_msg is None:
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error_msg = str(exc)
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return error_msg
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class ExceptionHandlerMixin:
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"""
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Mixin that transforms Django and Python exceptions into rest_framework ones.
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without the mixin, they return 500 status code which is not desired.
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"""
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expected_exceptions = {
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ValueError: rest_exceptions.ValidationError,
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ValidationError: rest_exceptions.ValidationError,
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PermissionError: rest_exceptions.PermissionDenied
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}
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def handle_exception(self, exc):
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if isinstance(exc, tuple(self.expected_exceptions.keys())):
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drf_exception_class = self.expected_exceptions[exc.__class__]
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drf_exception = drf_exception_class(get_error_message(exc))
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return super().handle_exception(drf_exception)
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return super().handle_exception(exc)
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