如何在 DRF 中使用 GET 请求获取包括关系 table 条目的数据

Question

我最近正在尝试 DRF，我的项目有以下问题需要解决。

我有两个模特

class JobsMaster(models.Model):
    job_id = models.CharField(max_length=128, unique=True)
    job_name = models.CharField(max_length=128)
    scheduled_time = models.CharField(max_length=128)
    args = models.TextField()
    interval = models.CharField(max_length=50)
    repeat = models.CharField(max_length=100)

class JobProcessDetails(models.Model):
    job_id = models.ForeignKey('JobsMaster')
    sequence = models.IntegerField()
    step_name = models.CharField(max_length=128)
    records = models.IntegerField(null=True,blank=True)
    created_by = models.CharField(max_length=155,default='system')
    created_on = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = (('job_id', 'sequence'),)

相应的序列化程序

class JobsMasterSerializer(serializers.ModelSerializer):

    class Meta:
        model = JobsMaster
        fields = '__all__'

class JobProcessDetailsSerializer(serializers.ModelSerializer):

    class Meta:
        model = JobProcessDetails
        fields = '__all__'

他们的视图集

class JobsMasterViewSet(viewsets.ModelViewSet):

    queryset = JobsMaster.objects.all()
    serializer_class = JobsMasterSerializer
    filter_fields = ('job_id',)

class JobProcessDetailsViewSet(viewsets.ModelViewSet):
    queryset = JobProcessDetails.objects.all()
    serializer_class = JobProcessDetailsSerializer
    filter_fields = ('job_id','sequence',)

我不知道这是否是构建视图集和序列化程序的正确方法，但它对我有用。

我想从 UI 写一个 GET 请求来从 JobProcessDetails 获取数据，其中还包括来自相关 JobsMaster table 的数据。

例如，响应数据应包含以下字段

    job_id : xxxxx
    sequence : xxxx
    step_name : 'xxxx'
    records : xxxx
    created_by : 'xxxxx'
    created_on : dd/mm/yyyy
    job_id__job_name : 'xxxxx'
    job_id__scheduled_time : 'xxxxx'
    job_id__args : 'xxxxx'
    job_id__interval : 'xxxxx'
    job_id__repeat : 'xxxxx'

有什么方法可以通过单个 GET 请求调整某些内容。

Answer 1

这样试试

class JobProcessDetailsSerializer(serializers.ModelSerializer):
  job_id = JobsMasterSerializer(read_only=True)

  class Meta:
    model = JobProcessDetails
    fields = [
      'job_id '
      'sequence'
      'step_name'
      'records'
      'created_by' 
      'created_on'
    ]

如何在 DRF 中使用 GET 请求获取包括关系 table 条目的数据

How to get the data including the relation table's entry with a GET request in DRF

django

django-serializer

django-rest-framework

django-rest-viewsets