Question

我有2种型号纸张和问题。用户可以选择任何论文，并可以创建该论文的副本（包括其问题）。如何在Django Rest Framework中实现呢？

models.py

class Paper(models.Model):    
    paper_name = models.CharField(max_length=128)

class Question(models.Model):
    question_text = models.CharField(max_length=1024)        
    paper_id = models.ForeignKey(Paper, related_name='questions_paper')

serializer.py

class PaperSerializer(serializers.ModelSerializer):        
    class Meta:
        fields = ('id', 'paper_name')
        model = Paper 

    def create(self, validated_data):           
        source_pape = ??  # paper whose copy to be made
        paper = Paper.objects.create(**validated_data)
        questions = Question.objects.filter(paper=source_paper)
        Question.objects.bulk_create([Question(paper=paper, question_text=question.question_text) for question in questions])
    return paper  

class QuestionSerializer(serializers.ModelSerializer):
    class Meta:
        fields = ('id', 'question_text', 'paper_id')
        model = Question

如何从用户那里获取输入source_paper（需要复制的纸张）并复制其数据？谢谢你。

Answer 1

尝试在创建时将 source_parer 传递给序列化程序。

class PaperSerializer(serializers.ModelSerializer):
    source_paper = serializers.CharField(write_only=True, required=True)

    class Meta:
        fields = ('id', 'paper_name', 'source_paper')
        model = Paper

    def create(self, validated_data):
        source_paper = validated_data.pop('source_paper')  # paper whose copy to be made
        paper = Paper.objects.create(**validated_data)
        questions = Question.objects.filter(paper=source_paper)
        Question.objects.bulk_create([Question(paper=paper, question_text=question.question_text) for question in questions])
        return paper

Django Rest Framework-为给定的父模型及其子模型中的相关条目复制数据

1 个答案: