Django Rest Framework-外键抛出错误

Question

我正在使用 django rest 框架，其中模型具有复合主键，其中一个是外键。

模型/TestSuite.py

class TestSuite(models.Model):
     team_name = models.ForeignKey('Team', on_delete=models.DO_NOTHING, db_column='team_name')
     suite_name = models.CharField(max_length=100)
     description = models.CharField(max_length=200, blank=True, null=True)
     schedule = models.CharField(max_length=100, blank=True, null=True)
     email_list_ok = models.CharField(max_length=200, blank=True, null=True)
     email_list_fail = models.CharField(max_length=200, blank=True, null=True)
     template_name = models.ForeignKey('EmailTemplates', on_delete=models.DO_NOTHING, db_column='template_name')

class Meta:
    managed = False
    db_table = 'test_suite'
    unique_together = (('team_name', 'suite_name'),)

models/Team.py

class Team(models.Model):
    team_name = models.CharField(primary_key=True, max_length=30)
    description = models.CharField(max_length=100, blank=True, null=True)

class Meta:
    managed = False
    db_table = 'team'

TestSuiteSerializer.py

class Meta:
    model = models.TestSuite
    fields = '__all__'

TestSuiteViewSet.py

class TestSuiteViewSet(viewsets.ModelViewSet):
    queryset = models.TestSuite.objects.all()
    serializer_class = serializers.TestSuiteSerializer

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data,
                                     many=isinstance(request.data, list))
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data,
                    status=status.HTTP_201_CREATED, headers=headers)

现在当我发出一个帖子请求时，它会抛出以下错误

当 post() 的 team_name 已经存在于团队表中时

{
    "team_name": [
        "test suite with this team name already exists."
    ]
}

当 post() 的 team_name 不存在于团队表中时

Exception Type:	ValueError
Exception Value:	
Cannot assign "'dummy'": "TestSuite.team_name" must be a "Team" instance.

有人可以在这里帮助我吗？我假设我错过了什么。

Answer 1

外键字段的第一个参数应该是模型本身，而不是模型的字符串（例如，不是“团队”，而是团队 - 对于 EmailTemplate 也是如此）

 class TestSuite(models.Model):
     # Change this field's first argument from a string to the Team class
     team_name = models.ForeignKey(Team, on_delete=models.DO_NOTHING, db_column='team_name')
     suite_name = models.CharField(max_length=100)
     description = models.CharField(max_length=200, blank=True, null=True)
     schedule = models.CharField(max_length=100, blank=True, null=True)
     email_list_ok = models.CharField(max_length=200, blank=True, null=True)
     email_list_fail = models.CharField(max_length=200, blank=True, null=True)
     # Change this field's first argument from a string to the EmailTemplates class
     template_name = models.ForeignKey(EmailTemplates, on_delete=models.DO_NOTHING, db_column='template_name')

     class Meta:
         managed = False
         db_table = 'test_suite'
         unique_together = (('team_name', 'suite_name'),)