django rest框架，使用动作装饰器添加路径以查看url中的财务报表

问题描述

我需要以下URL才能在股票行情指示器代表AAPL或AMZN的股票行情指示器的地方工作，并且要代表Income_Statement。

localhost:8000/stocks/ localhost:8000/stocks/<TICKER>/ localhost:8000/stocks/<TICKER>/is/

在下面的views.py文件中，我使用的是一个视图集，该路由器和路由器会自动配置上面的前两个网址，对于第三个网址，我使用了带有methods=['get']和url_path="is"的动作装饰器来实现localhost:8000/stocks/<TICKER>/is/路径。

已配置了第三个URL，但是在浏览器中输入以下URL时，出现ticker的关键错误：localhost:8000/stocks/AAPL/is/

我在做什么错，我相信错误是在views.py get_income_statement函数中？

models.py

class Stock(models.Model):

    id = models.UUIDField(default=uuid.uuid4,editable=False,unique=True)
    ticker = models.CharField(max_length=10,unique=True,primary_key=True)
    slug = models.SlugField(default="",editable=False)

    def save(self,*args,**kwargs):
        value = self.ticker
        self.slug = slugify(value,allow_unicode=True)
        super().save(*args,**kwargs)

    def __str__(self):
        return self.ticker

    class Meta:
        verbose_name = "stock"
        verbose_name_plural = "stocks"
        ordering = ["ticker"]

class IncomeStatement(models.Model):
    ticker = models.ForeignKey(
        Stock,on_delete=models.CASCADE,related_name="income_statements"
    )

    date = models.DateField(default=datetime.date.today)
    periodicity_CHOICES = [("ANNUAL","ANNUAL"),("QUARTERLY","QUARTERLY")]
    periodicity = models.CharField(
        max_length=10,choices=periodicity_CHOICES,default="annually"
    )
    net_income_continuous_operations = models.DecimalField(
        max_digits=20,decimal_places=2

views.py

class StockViewSet(viewsets.ModelViewSet):
    queryset = Stock.objects.all()
    serializer_class = StockSerializer
    # lookup_field = "slug"

    @action(detail=True,methods=["get"],url_path="is",url_name="is")
    def get_income_statement(self,request,**kwargs):
        income_statement = self.queryset.get(ticker=kwargs["ticker"]).select_related(
            "income_statements"
        )
        serializer = IncomeStatementSerializer(data=income_statement)
        if serializer.is_valid():
            return Response(serializer.data)
        else:
            return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

urls.py

router = DefaultRouter()
router.register(r"stocks",views.StockViewSet)
urlpatterns = router.urls

解决方法

设置 Pallet

lookup_field = "ticker"

Update-1

class StockViewSet(viewsets.ModelViewSet):
    # rest of your code
    lookup_field = "ticker"