35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""
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Django Rest Framework view mixins.
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"""
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from django.core.exceptions import ValidationError
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from django.http import Http404
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from rest_framework import status
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from rest_framework.mixins import CreateModelMixin
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from rest_framework.response import Response
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class PutAsCreateMixin(CreateModelMixin):
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"""
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Backwards compatibility with Django Rest Framework v2, which allowed
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creation of a new resource using PUT.
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"""
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def update(self, request, *args, **kwargs):
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"""
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Create/update course modes for a course.
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"""
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# First, try to update the existing instance
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try:
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try:
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return super().update(request, *args, **kwargs)
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except Http404:
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# If no instance exists yet, create it.
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# This is backwards-compatible with the behavior of DRF v2.
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return super().create(request, *args, **kwargs)
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# Backwards compatibility with DRF v2 behavior, which would catch model-level
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# validation errors and return a 400
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except ValidationError as err:
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return Response(err.messages, status=status.HTTP_400_BAD_REQUEST)
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