如何显示与其他模型相关的模型的细节？

Question

当URL (例如localhost:8000/apirest/customers )时，我需要它。

Customers是一个表，它是一个表角色，我需要显示所有角色字段。

class Customer(models.Model):
    Id = models.AutoField(primary_key=True)
    Name = models.CharField(max_length=60)
    Address = models.CharField(max_length=60)
    Phone =  models.CharField(max_length=60)
    Role = models.ForeignKey(Role, on_delete=models.CASCADE)

   class Role(models.Model):
        Id = models.AutoField(primary_key=True)
        Description = models.CharField(max_length=60)
        Premium = models.BooleanField()

这只是一个例子，我需要Json展示这样的东西

{
     "Id":1,
     "Name":"Jhon Carter",
     "Adress": "Lombard Street"
     "Phone": "25 56592552",
     "Role":{
           "Id":1,
           "Description":"Description 1"
           "Premium": true
      }

}

Answer 1

欢迎来到素豪尔赫。

首先，您的模型编译成功吗？因为在这一行：

Role = models.ForeignKey(Role, on_delete=models.CASCADE)

我得到了Undefined Role，这是因为角色定义在下一行。因此，我将模型定义改为：

class Customer(models.Model):
    class MyRole(models.Model):
        Id = models.AutoField(primary_key=True)
        Description = models.CharField(max_length=60)
        Premium = models.BooleanField()

    Id = models.AutoField(primary_key=True)
    Name = models.CharField(max_length=60)
    Address = models.CharField(max_length=60)
    Phone = models.CharField(max_length=60)
    Role = models.ForeignKey(MyRole, on_delete=models.CASCADE)

您想要做的是序列化关系，对于您的情况是这样的：

from rest_framework import serializers
from core.models import Customer


class RoleSerializer(serializers.ModelSerializer):
    class Meta:
        model = Customer.MyRole
        fields = ['Id', 'Description', 'Premium']


class CustomerSerializer(serializers.ModelSerializer):
    Role = RoleSerializer(many=False, read_only=True)

    class Meta:
        model = Customer
        fields = ['Id', 'Name', 'Address', 'Phone', 'Role']