python - 在DRF中显示ForeignKey属性

当我运行api时，没有获取category名称和subcategory名称，而是获取了它们的ID，

[
    {
        "id": 1,
        "name": "StrawBerry",
        "category": 1,
        "subcategory": 1
    }
]

我实际上想要这样的东西：

[
    {
        "id": 1,
        "name": "StrawBerry",
        "category": "Fruits",
        "subcategory": "Berries"
    }
]

注意：我已经有类别和子类别。我只想知道如何访问它们。

models.py

from django.db import models

class Category(models.Model):
    category = models.CharField(max_length=200)
    parent = models.ForeignKey('self', blank=True, null=True, related_name='children')

    class Meta:
        unique_together = ('parent' , 'category')

    def __str__(self):
        return self.category

class SubCategory(models.Model):
    subcategory = models.CharField(max_length=200)
    category = models.ForeignKey('Category', null=True, blank=True)
    parent = models.ForeignKey('self', blank=True, null=True, related_name='subchilren')

    class Meta:
        unique_together = ('parent' , 'subcategory')

    def __str__(self):
        return self.subcategory

class Product(models.Model):
    name = models.CharField(max_length=200)
    category = models.ForeignKey('Category', null=True, blank=True)
    subcategory = models.ForeignKey('SubCategory', null=True, blank=True)

    def __str__(self):
        return self.name

serializers.py

class GetProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = ('id', 'name', 'category', 'subcategory')

views.py

class GetProductViewSet(viewsets.ModelViewSet):
    serializer_class = GetProductSerializer
    queryset = Product.objects.all()

最佳答案

一种解决方案是将category的subcategory和GetProductSerializer字段定义为StringRelatedFields：


  StringRelatedField可以使用其unicode方法来表示关系的目标。


http://www.django-rest-framework.org/api-guide/relations/#stringrelatedfield

或者类似地，作为SlugRelatedFields：


  SlugRelatedField可用于使用目标上的字段表示关系的目标。


http://www.django-rest-framework.org/api-guide/relations/#slugrelatedfield