我正在尝试为我的模型编写一个具有ManyToManyField的序列化器。我的问题似乎非常严重similar to this example,但目前我对使用SlugField并不感兴趣,但是我仍然不清楚我的问题是什么。
models.py
class Objective(models.Model):
objective_name = models.CharField(max_length=10)
objective_description = models.CharField(max_length=30)
def __str__(self):
return self.objective_name
class Assessment(models.Model):
objective = models.ManyToManyField(Objective)
date_completed = models.DateField(auto_now_add=True)
serializers.py
class AssessmentSerializer(serializers.ModelSerializer):
objective = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
class Meta:
model = Assessment
fields = ['name', 'date_completed', 'objective']
class ObjectiveSerializer(serializers.ModelSerializer):
class Meta:
model = Objective
fields = '__all__'
[从the DRF docs开始,我以为以下POST将创建一个评估对象,其中我已经有两个ID分别为3和4的Objective对象。
{
"name": "Quiz 3",
"objective": [
3,
4
]
}
但是,这会创建评估对象,但它与目标之间没有链接。
{
"name": "Quiz 3",
"date_completed": "2020-03-17",
"objective": []
}
我的序列化程序是否正确,或者我对POST使用的语法错误,还是有其他问题?
您已在read_only=True
字段中设置objective
。如果将字段设置为read_only
,则DRF将不接受输入数据。
class AssessmentSerializer(serializers.ModelSerializer):
objective = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
class Meta:
model = Assessment
fields = ['name', 'date_completed', 'objective']