Python Django ORM 和 Django REST Framework：如何制作分组数组

目前，我的Django服务器可以返回以下JSON:

[
  {
    "id": 1,
    "customer": {
      "id": 1,
      "name": "John Doe"
    },
    "description1": "...",
    "description2": "...",
    "description3": "...",
    "description4": "..."
  },
  {
    "id": 2,
    "customer": {
      "id": 1,
      "name": "John Doe"
    },
    "description1": "...",
    "description2": "...",
    "description3": "...",
    "description4": "..."
  },
  {
    "id": 3,
    "customer": {
      "id": 1,
      "name": "John Doe"
    },
    "description1": "...",
    "description2": "...",
    "description3": "...",
    "description4": "..."
  },
  {
    "id": 4,
    "customer": {
      "id": 2,
      "name": "Jane Doe"
    },
    "description1": "...",
    "description2": "...",
    "description3": "...",
    "description4": "..."
  },
  {
    "id": 5,
    "customer": {
      "id": 2,
      "name": "Jane Doe"
    },
    "description1": "...",
    "description2": "...",
    "description3": "...",
    "description4": "..."
  }
]

我的模特是:

from django.db import models

class Customer(models.Model):
    name = models.CharField(verbose_name="Customer name")

from django.db import models


class PurchaseDescriptions(models.Model):
    customer =  models.ManyToManyField("customer.Customer", related_name="customer", verbose_name="Customer")
    description1 = models.CharField(verbose_name="Description 1")
    description2 = models.CharField(verbose_name="Description 2")
    description3 = models.CharField(verbose_name="Description 3")
    description4 = models.CharField(verbose_name="Description 4")

我的序列化程序是:

from rest_framework import serializers

class CustomerSerializer(serializers.ModelSerializer):
    class Meta:
        model = Customer
        fields = [
            "id",
            "name",
        ]

class PurchaseDescriptionsSerializer(serializers.ModelSerializer):
    customer = CustomerSerializer()
    
    class Meta:
        model = PurchaseDescriptions
        fields = [
            "id",
            "customer",
            "description1",
            "description2",
            "description3",
            "description4",
        ]

发帖主题:Re:Колибри0.7.0

from rest_framework.viewsets import GenericViewSet
from rest_framework import mixins

class ScheduleViewSet(
    mixins.ListModelMixin,
    GenericViewSet,
):
    queryset = PurchaseDescriptions.objects.all()
    serializer_class = PurchaseDescriptionsSerializer

我想重写它，并在customer的基础上做一些群，例如

[
  {
    "customer": {
      "id": 1,
      "name": "John Doe"
    },
    "data": [
      {
        "id": 1,
        "description1": "...",
        "description2": "...",
        "description3": "...",
        "description4": "..."
      },
      {
        "id": 2,
        "description1": "...",
        "description2": "...",
        "description3": "...",
        "description4": "..."
      },
      {
        "id": 3,
        "description1": "...",
        "description2": "...",
        "description3": "...",
        "description4": "..."
      }
    ]
  },
  {
    "customer": {
      "id": 2,
      "name": "Jane Doe"
    },
    "data": [
      {
        "id": 4,
        "description1": "...",
        "description2": "...",
        "description3": "...",
        "description4": "..."
      },
      {
        "id": 5,
        "description1": "...",
        "description2": "...",
        "description3": "...",
        "description4": "..."
      }
    ]
  }
]

但我不知道如何使用Django的视图和序列化程序来实现这一点.我怎么才能得到这样的JSON呢？请注意，如果可能的话，我希望避免在数据库中创建其他表.