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import random
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from django.shortcuts import render
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from rest_framework.decorators import api_view
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from rest_framework.response import Response
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from rest_framework.views import APIView
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from rest_framework import status
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import openpyxl
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from .models import Students
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from .models import Pledge
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from channels.layers import get_channel_layer
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from asgiref.sync import async_to_sync
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from django.http import JsonResponse
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from decimal import Decimal
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from django.http import HttpResponse
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from django.db.models import Min, Max
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from django.db import transaction
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# class TestView(APIView):
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# def get(self, request):
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# data = {
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# "message": "Hello from Django!",
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# "status": "success"
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# }
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# return Response(data, status=status.HTTP_200_OK)
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# @api_view(['POST'])
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# def upload_students(request):
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# # 获取上传的文件
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# file = request.FILES.get('file')
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#
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# if not file:
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# return Response({'error': '没有上传文件'}, status=status.HTTP_400_BAD_REQUEST)
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#
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# try:
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# # 读取 Excel 文件
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# wb = openpyxl.load_workbook(file)
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# sheet = wb.active
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#
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# # 遍历 Excel 表格的每一行，并保存到数据库
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# for row in sheet.iter_rows(min_row=2, values_only=True):
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# sid, name = row[0], row[1]
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#
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# # 使用 update_or_create 保存到数据库
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# Students.objects.update_or_create(
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# sid=sid,
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# defaults={'name': name, 'score': 0}
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# )
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#
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# return Response({'message': '导入成功！'}, status=status.HTTP_200_OK)
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#
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# except Exception as e:
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# return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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@api_view(['POST'])
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def upload_students(request):
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file = request.FILES.get('file')
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if not file:
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return Response({'error': '没有上传文件'}, status=status.HTTP_400_BAD_REQUEST)
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try:
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wb = openpyxl.load_workbook(file)
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sheet = wb.active
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# 使用列表收集学生数据
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students_data = []
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for row in sheet.iter_rows(min_row=2, values_only=True):
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sid, name = row[0], row[1]
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students_data.append(Students(sid=sid, name=name, score=0))
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# 开始一个事务
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with transaction.atomic():
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# 清空表
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Students.objects.all().delete()
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# 批量插入学生数据
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Students.objects.bulk_create(students_data)
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return Response({'message': '导入成功！'}, status=status.HTTP_200_OK)
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except Exception as e:
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return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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@api_view(['GET'])
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def get_student_info(request, student_id):
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try:
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student = Students.objects.get(sid=student_id)
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return JsonResponse({'name': student.name, 'score': student.score})
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except Students.DoesNotExist:
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return JsonResponse({'error': 'Student not found'}, status=404)
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@api_view(['POST'])
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def update_student_score(request):
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student_id = request.data.get('student_id')
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score = request.data.get('score')
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try:
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student = Students.objects.get(sid=student_id)
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student.score = Decimal(score) # 将分数转换为 Decimal 类型
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student.save()
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return JsonResponse({'success': True})
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except Students.DoesNotExist:
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return JsonResponse({'error': 'Student not found'}, status=404)
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except Exception as e:
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return JsonResponse({'error': str(e)}, status=500)
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@api_view(['GET'])
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def get_student_info_by_name(request, student_name):
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try:
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student = Students.objects.get(name=student_name) # 根据姓名查询学生
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return JsonResponse({'name': student.name, 'score': student.score})
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except Students.DoesNotExist:
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return JsonResponse({'error': 'Student not found'}, status=404)
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@api_view(['POST'])
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def send_exemption_card(request):
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student_id = request.data.get('studentId')
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student_name = request.data.get('studentName')
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new_score = request.data.get('newScore')
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try:
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student = Students.objects.get(sid=student_id)
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student.score = new_score # 更新积分
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student.save()
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return JsonResponse({'message': '豁免卡信息处理成功'}, status=200)
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except Students.DoesNotExist:
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return JsonResponse({'error': '学生未找到'}, status=404)
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@api_view(['GET'])
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def leaderboard(request):
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# 获取积分排名前5的学生
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top_students = Students.objects.order_by('-score')[:5]
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leaderboard_data = [{'name': student.name, 'score': student.score} for student in top_students]
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return JsonResponse(leaderboard_data, safe=False)
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@api_view(['POST'])
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def create_pledge(request):
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student_id = request.data.get('studentId')
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student_name = request.data.get('studentName')
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pledge_score = request.data.get('pledgeScore')
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if not student_id or not student_name or not pledge_score:
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return Response({'error': '所有字段都是必需的'}, status=status.HTTP_400_BAD_REQUEST)
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pledge = Pledge.objects.create(
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student_id=student_id,
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student_name=student_name,
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pledge_score=pledge_score,
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status=0 # 设置状态为 0，表示未完成
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)
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return Response({'message': '典当信息已保存', 'pledge_id': pledge.id}, status=status.HTTP_201_CREATED)
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@api_view(['POST'])
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def update_question_score(request):
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student_id = request.data.get('studentId')
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question_score = request.data.get('questionScore')
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print(request.data)
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try:
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student = Students.objects.get(sid=student_id)
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# student = Students.objects.prefetch_related('pledges').get(sid=student_id)
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student.score += Decimal(question_score) # 直接增加教师给的积分
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student.save() # 保存更新后的积分
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pledge = Pledge.objects.filter(student_id=student_id).order_by('-created_at').first()
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# pledge = student.pledges.order_by('-created_at').first()
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if pledge:
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if pledge.status == 0: # 典当状态为0
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pledge_score_decimal = Decimal(pledge.pledge_score) # 获取典当的积分
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if question_score >= 2:
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student.score += pledge_score_decimal * Decimal(2) # 加倍典当积分
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else:
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student.score -= pledge_score_decimal # 减去典当积分
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pledge.status = 1 # 更新典当状态为1
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pledge.save() # 保存更新后的典当状态
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student.save() # 保存最终的学生积分
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# 返回积分和典当信息
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return Response({
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'message': '积分更新成功',
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'current_score': str(student.score),
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'pledge_score': str(pledge.pledge_score),
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'pledge_status': pledge.status,
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}, status=status.HTTP_200_OK)
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else:
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# 返回更新后的积分和初始积分
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return Response({
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'message': '积分更新成功，但没有新的典当信息',
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'updated_score': str(student.score),
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}, status=status.HTTP_200_OK)
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else:
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return Response({
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'updated_score': str(student.score),
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}, status=status.HTTP_200_OK)
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except Students.DoesNotExist:
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return Response({'error': '学生不存在'}, status=status.HTTP_404_NOT_FOUND)
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except Exception as e:
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return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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# 定义导出学生数据的 API 视图，接受 POST 请求
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@api_view(['POST'])
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def export_students_scores(request):
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try:
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# 获取所有学生信息
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students = Students.objects.all()
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# 找到最低和最高积分用于计算百分比
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min_score = students.aggregate(min_score=Min('score'))['min_score']
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max_score = students.aggregate(max_score=Max('score'))['max_score']
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# 处理为百分比
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def calculate_percentage(score, min_score, max_score):
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if max_score == min_score: # 避免分母为0
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return 50 # 所有学生得分相同时，统一设为50%
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return (score - min_score) / (max_score - min_score) * 100
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# 创建 Excel 工作簿
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wb = openpyxl.Workbook()
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ws = wb.active
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ws.title = "学生积分百分比"
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# 写入表头
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ws.append(["学号", "姓名", "积分", "百分比"])
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# 写入每个学生的信息
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for student in students:
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percentage = calculate_percentage(student.score, min_score, max_score)
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ws.append([student.sid, student.name, float(student.score), f"{percentage:.2f}%"])
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# 保存 Excel 文件
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response = HttpResponse(content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
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response['Content-Disposition'] = 'attachment; filename=students_scores.xlsx'
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wb.save(response)
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return response
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except Exception as e:
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return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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