显示每个字段有多少项具有每个字段的DjangoREST

# models.py
from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)
    author = models.CharField(max_length=100)
    publication_date = models.DateField()

# serializers.py
from rest_framework import serializers
from .models import Book

class BookStatisticsSerializer(serializers.Serializer):
    def get_statistics(self):
        stats = {}
        for field in self.Meta.model._meta.fields:
            field_name = field.name
            unique_values_count = self.Meta.model.objects.values(field_name).distinct().count()
            stats[field_name] = unique_values_count
        return stats

    class Meta:
        model = Book

# views.py
from rest_framework.views import APIView
from rest_framework.response import Response
from .serializers import BookStatisticsSerializer
from .models import Book

class BookStatisticsView(APIView):
    def get(self, request, format=None):
        serializer = BookStatisticsSerializer()
        statistics = serializer.get_statistics()
        return Response(statistics)

# urls.py
from django.urls import path
from .views import BookStatisticsView

urlpatterns = [
    path('books/statistics/', BookStatisticsView.as_view(), name='book-statistics'),
]