“QuerySet”对象没有“简化”属性

Question

我正在尝试执行一个相当简单的 GET 请求，该请求会导致使用 DRF 进行查询：

def get(self, request, character):
    char_entry = Dictionary.objects.filter(Q(simplified=character) | Q(traditional=character))
    serializer = DictionarySerializer(char_entry)
    return Response({"character": serializer.data})

我的 DictionarySerializer 看起来像这样：

从 rest_framework 导入序列化程序 从 .models 导入字典

class DictionarySerializer(serializers.ModelSerializer):

    class Meta:
        model = Dictionary
        fields = ["id", "simplified", "pinyin_numbers", "pinyin_marks", "translation", "level", "traditional", ]

我的 Dictionary 模型如下所示：

class Dictionary(models.Model):
    traditional = models.CharField(max_length=50)
    simplified = models.CharField(max_length=50)
    pinyin_numbers = models.CharField(max_length=50)
    pinyin_marks = models.CharField(max_length=50)
    translation = models.TextField()
    level = models.IntegerField()

    class Meta:
        db_table = 'dictionary'
        indexes = [
            models.Index(fields=['simplified', ]),
            models.Index(fields=['traditional', ]),
        ]

据我所知，这应该序列化 Dictionary 表中的所有字段，包括简化字段。

为什么 Django 找不到属性？我错过了什么？

Answer 1

QuerySet 是项目的集合。因此它可以包含零个、一个或多个项目。您需要使用many=True 参数进行序列化：

def get(self, request, character):
    char_entry = Dictionary.objects.filter(
        Q(simplified=character) | Q(traditional=character)
    )
    serializer = DictionarySerializer(char_entry, many=True)
    return Response({'character': serializer.data})

或者如果我们知道只有一项，我们应该检索那一项：

from django.shortcuts import get_object_or_404

def get(self, request, character):
    char_entry = get_object_or_404(
        Dictionary,
        Q(simplified=character) | Q(traditional=character)
    )
    serializer = DictionarySerializer(char_entry, many=True)
    return Response({'character': serializer.data})