Python 毕业设计-图书借阅管理系统 - 附报告源码，保证可用.zip

from django.shortcuts import render, redirect from django.views import View from django.contrib import messages from django.db.models import Q from mylibrary.models import User, Book, Borrow, Log from mylibrary.forms import LoginForm, RegisterForm, SearchForm from datetime import datetime, timedelta import hashlib class IndexView(View): """ 主页 """ def get(self, request): return redirect('/login/') class LoginView(View): """ 登录 """ def get(self, request): if request.session.get('is_login', None): return redirect('/home/') login_form = LoginForm() return render(request, 'login.html', locals()) def post(self, request): login_form = LoginForm(request.POST) message = '请检查填写的内容！' if login_form.is_valid(): user_id = login_form.cleaned_data['user_id'] password = login_form.cleaned_data['password'] user = User.objects.filter(id=user_id).first() if user and user.password == hashcode(password, user_id): request.session['is_login'] = True request.session['user_id'] = user.id request.session['user_name'] = user.name Log.objects.create(user_id=user_id, action='登录') return redirect('/home/') else: message = '用户名或密码错误！' return render(request, 'login.html', locals()) class LogoutView(View): """ 登出 """ def get(self, request): if request.session.get('is_login', None): Log.objects.create(user_id=request.session['user_id'], action='登出') request.session.flush() messages.success(request, '登出成功！') return redirect('/login/') class RegisterView(View): """ 注册 """ def get(self, request): register_form = RegisterForm() return render(request, 'register.html', locals()) def post(self, request): register_form = RegisterForm(request.POST) message = '请检查填写的内容！' if register_form.is_valid(): user_name = register_form.cleaned_data['user_name'] user_id = register_form.cleaned_data['user_id'] password1 = register_form.cleaned_data['password1'] password2 = register_form.cleaned_data['password2'] if password1 == password2: same_id_users = User.objects.filter(id=user_id) if same_id_users: message = '该学号已被注册！' else: User.objects.create(id=user_id, name=user_name, password=hashcode(password1, user_id)) Log.objects.create(user_id=user_id, action='注册') messages.success(request, '注册成功！') return redirect('/login/') else: message = '两次输入的密码不一致！' return render(request, 'register.html', locals()) class HomeView(View): """ 个人中心 """ def get(self, request): if not request.session.get('is_login', None): messages.error(request, '请先登录！') return redirect('/login/') user_id = request.session['user_id'] borrow_entries = Borrow.objects.filter(user_id=user_id) return render(request, 'home.html', locals()) class SearchView(View): """ 借书 """ def get(self, request): if not request.session.get('is_login', None): messages.error(request, '请先登录！') return redirect('/login/') search_form = SearchForm(request.GET) if search_form.is_valid(): keyword = search_form.cleaned_data['keyword'] books = Book.objects.filter(Q(name__icontains=keyword) | Q(author__icontains=keyword) | Q(publisher__icontains=keyword)) if not books: message = '未查询到相关书籍！' return render(request, "search.html", locals()) class BorrowView(View): """ 借书操作 """ def get(self, request): if not request.session.get('is_login', None): messages.error(request, '请先登录！') return redirect('/login/') user_id = request.session['user_id'] book_id = request.GET.get('book_id') books = Book.objects.filter(id=book_id, is_available=True) if books: book = books.first() borrow_time = datetime.now() return_ddl = borrow_time + timedelta(days=90) Borrow.objects.create(user_id=user_id, book_id=book_id, borrow_time=borrow_time, return_ddl=return_ddl) book.is_available = False book.save() Log.objects.create(user_id=user_id, book_id=book_id, action='借书') messages.success(request, '借书成功！') else: messages.error(request, '借书失败：此书不存在或已借出！') return redirect('/search/') class ReturnView(View): """ 还书操作 """ def get(self, request): if not request.session.get('is_login', None): messages.error(request, '请先登录！') return redirect('/login/') user_id = request.session['user_id'] book_id = request.GET.get('book_id') borrow_entries = Borrow.objects.filter(user_id=user_id, book_id=book_id) if borrow_entries: borrow_entry = borrow_entries.first() delta = -(borrow_entry.borrow_time - datetime.now()) # 负天数不足一天算一天 exceed_days = delta.days - 90 if exceed_days > 0: fine = exceed_days * 0.5 messages.warning(request, '已逾期 {} 天，需缴纳罚金 {} 元！'.format(exceed_days, fine)) borrow_entry.delete() book = Book.objects.get(id=book_id) book.is_available = True book.save() Log.objects.create(user_id=user_id, book_id=book_id, action='还书') messages.success(request, '还书成功！') else: messages.error(request, '还书失败：您未借过此书！') return redirect('/home/') class TestView(View): """ for test """ def get(self, request): search_form = SearchForm() return render(request, 'test.html', locals()) def hashcode(s, salt='17373252'): s += salt h = hashlib.sha256() h.update(s.encode()) return h.hexdigest()