Question

所以，我知道ModelSerializer支持基于当前对象中的外键的嵌套模型对象。但是，我想知道如何使用特定的字段等于另一个对象来进行交叉连接模型？

即

class classroom(models.Model):
    id = models.AutoField(primary_key = True, editable = False)

class student(models.Model):
    id = models.AutoField(primary_key = True, editable = False)
    classroom = models.ForeignKey(classroom, on_delete=models.CASCADE)

现在我想用教室模型做一个ModelSerializer。我想归档的想法是返回student.objects.filter(classroom = self.id) [self is classrom]

我如何从学生那里获取数据？（课堂上针对学生没有ForeignKey）

class classroomSerializer(ModelSerializer):
# students = ??
class Meta:
    model = classroom
    fields = [
        'id',
        'students',
    ]

Answer 1

您可以为学生模型定义另一个序列化程序，并在课堂序列化程序中引用它。

class classroomSerializer(ModelSerializer):
students = studentserializer(many=True)
class Meta:
    model = classroom
    fields = [
      'id',
      'students'
    ]

在学生模型中添加related_name

class student(models.Model):
    id = models.AutoField(primary_key = True, editable = False)
    classroom = models.ForeignKey(classroom, on_delete=models.CASCADE, related_name='students')

Django Rest-Framework：如何在ModelSerializer中交叉对象

1 个答案: