我的專案中有兩個模型：作者和書籍。每本書都有一個指向本書作者的外鍵。我想撰寫一個 api 來檢索作者的實體并顯示該特定人員的詳細資訊。問題是我不知道如何在我的 API 中包含那個人的書。
這是我的models.py：
class Book(models.Model):
title = models.CharField(max_length=150)
rating = models.IntegerField(default=0, validators=[MaxValueValidator(10), MinValueValidator(0),])
summary = models.TextField()
author = models.ForeignKey(Author, null=True, on_delete=models.SET_NULL)
class Author(models.Model):
authorID = models.AutoField(primary_key=True)
name = models.CharField(max_length=200)
dateOfBirth = models.DateField(null=True)
nationality = models.CharField(null=True, max_length=255)
這是對我不起作用的方法：
# Serializers.py
class AuthorRetrieveSerializer(serializers.ModelSerializer):
class BookSerializer(serializers.ModelSerializer):
class Meta:
model = Book
fields = '__all__'
bookDetails = BookSerializer(read_only=True, many=True)
class Meta:
model = Author
fields = ('name', 'dateOfBirth', 'nationality', 'bookDetails')
# Views.py
class AuthorRetrieveViewSet(RetrieveUpdateDestroyAPIView):
permission_classes = (AllowAny,)
serializer_class = serializers.AuthorRetrieveSerializer
queryset = Author.objects.all()
lookup_field = 'authorID'
def get_queryset(self):
return self.queryset
此代碼成功檢索了作者詳細資訊，但沒有給我他們的書。
uj5u.com熱心網友回復：
您是否嘗試過在序列化程式上指定源？
# Serializers.py
class BookSerializer(serializers.ModelSerializer):
class Meta:
model = Book
fields = '__all__'
class AuthorRetrieveSerializer(serializers.ModelSerializer):
bookDetails = BookSerializer(read_only=True, many=True, source="book_set")#correction here
class Meta:
model = Author
fields = ('name', 'dateOfBirth', 'nationality', 'bookDetails')
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