Python高级进阶(二)Python框架之Django写图书管理系统(LMS)

# 万物本源，你在写项目的时候，如果连最基本的原理都不懂，出了Bug你怎么解决 # 如果是在看不懂，只需要理解http通信原理就可以了，以后我会翻译Django网站部分内容并带大家解读Djaogo源码，如果那时候你还在看我的博客的话，你会发现现在这些都是A piece Of cake

"""lms URL Configuration The `urlpatterns` list routes URLs to views. For more information please see: https://docs.djangoproject.com/en/1.11/topics/http/urls/ Examples: Function views 1. Add an import: from my_app import views 2. Add a URL to urlpatterns: url(r'^$', views.home, name='home') Class-based views 1. Add an import: from other_app.views import Home 2. Add a URL to urlpatterns: url(r'^$', Home.as_view(), name='home') Including another URLconf 1. Import the include() function: from django.conf.urls import url, include 2. Add a URL to urlpatterns: url(r'^blog/', include('blog.urls')) """ from django.conf.urls import url from django.contrib import admin from app01 import views urlpatterns = [ # 管理员账户登陆 url(r'^admin/', admin.site.urls), # 出版社列表 url(r'^publisher_list/', views.publisher_list), # 添加出版社 url(r'^add_publisher/', views.add_publisher), # 删除出版社 url(r'^drop_publisher/', views.drop_publisher), # 修改出版社 url(r'^edit_publisher/', views.edit_publisher), url(r'^book_list/', views.book_list), url(r'^add_book/', views.add_book), url(r'^drop_book/', views.drop_book), url(r'^edit_book/', views.edit_book), url(r'^author_list/', views.author_list), url(r'^add_author/', views.add_author), url(r'^drop_author/', views.drop_author), url(r'^edit_author/', views.edit_author), url(r'^$', views.publisher_list), # 只有跟网址，默认匹配 ]

from django.shortcuts import render, redirect # Create your views here. from app01 import models # 出版社列表 def publisher_list(request): # 查询 publisher = models.Publisher.objects.all() # ORM中的查询全部 # 渲染 return render(request, 'publisher_list.html', {'publisher_list': publisher}) # 添加出版社 def add_publisher(request): # POST请求表示用户已提交数据 if request.method == 'POST': new_publisher_name = request.POST.get('name') models.Publisher.objects.create(name=new_publisher_name) return redirect('/publisher_list/') # 渲染待添加页面给用户 return render(request, 'add_publisher.html') # 删除出版社 def drop_publisher(request): # GET请求拿到url中的ID drop_id = request.GET.get('id') drop_obj = models.Publisher.objects.get(id=drop_id) drop_obj.delete() return redirect('/publisher_list/') # 编辑出版社 def edit_publisher(request): if request.method == 'POST': edit_id = request.GET.get('id') edit_obj = models.Publisher.objects.get(id=edit_id) new_name = request.POST.get('name') edit_obj.name = new_name # 注意保存  edit_obj.save() return redirect('/publisher_list/') edit_id = request.GET.get('id') edit_obj = models.Publisher.objects.get(id=edit_id) return render(request, 'edit_publisher.html', {'publisher': edit_obj}) # 书籍的列表 def book_list(request): book = models.Book.objects.all() return render(request, 'book_list.html', {'book_list': book}) # 添加本书籍 def add_book(request): if request.method == 'POST': new_book_name = request.POST.get('name') publisher_id = request.POST.get('publisher_id') models.Book.objects.create(name=new_book_name, publisher_id=publisher_id) return redirect('/book_list/') res = models.Publisher.objects.all() return render(request, 'add_book.html', {'publisher_list': res}) # 删除本书籍 def drop_book(request): drop_id = request.GET.get('id') drop_obj = models.Book.objects.get(id=drop_id) drop_obj.delete() return redirect('/book_list/') # 编辑本书籍 def edit_book(request): if request.method == 'POST': new_book_name = request.POST.get('name') new_publisher_id = request.POST.get('publisher_id') edit_id = request.GET.get('id') edit_obj = models.Book.objects.get(id=edit_id) edit_obj.name = new_book_name edit_obj.publisher_id = new_publisher_id edit_obj.save() return redirect('/book_list/') edit_id = request.GET.get('id') edit_obj = models.Book.objects.get(id=edit_id) all_publisher = models.Publisher.objects.all() return render(request, 'edit_book.html', {'book': edit_obj, 'publisher_list': all_publisher}) # 作者的列表 def author_list(request): author = models.Author.objects.all() return render(request, 'author_list.html', {'author_list': author}) # 添加个作者 def add_author(request): if request.method == 'POST': new_author_name = request.POST.get('name') models.Author.objects.create(name=new_author_name) return redirect('/author_list/') return render(request, 'add_author.html') # 删除个作者 def drop_author(request): drop_id = request.GET.get('id') drop_obj = models.Author.objects.get(id=drop_id) drop_obj.delete() return redirect('/author_list/') # 修改下作者 def edit_author(request): if request.method == 'POST': edit_id = request.GET.get('id') edit_obj = models.Author.objects.get(id=edit_id) new_author_name = request.POST.get('name') new_book_id = request.POST.getlist('book_id') edit_obj.name = new_author_name edit_obj.book.set(new_book_id) edit_obj.save() return redirect('/author_list/') edit_id = request.GET.get('id') edit_obj = models.Author.objects.get(id=edit_id) all_book = models.Book.objects.all() return render(request, 'edit_author.html', { 'author': edit_obj, 'book_list': all_book })

 <tbody> {% for publisher in publisher_list %} <tr> <td>{{ forloop.counter }}</td> <td>{{ publisher.name }}</td> <td class="text-center"> <a class="btn btn-info btn-sm" href="/edit_publisher/?id={{ publisher.id }}"><i class="fa fa-pencil fa-fw" aria-hidden="true"></i>编辑 </a> <a class="btn btn-danger btn-sm" href="/drop_publisher/?id={{ publisher.id }}"><i class="fa fa-trash-o fa-fw" aria-hidden="true"></i>删除 </a> </td> </tr> {% endfor %} </tbody>

<select class="form-control" name="publisher_id"> {% for publisher in publisher_list %} {# 如果当前循环到的出版社 和 书关联的出版社 相等 #} {% if publisher == book.publisher %} <option selected value="{{ publisher.id }}">{{ publisher.name }}</option> {% else %} <option value="{{ publisher.id }}">{{ publisher.name }}</option> {% endif %} {% endfor %} </select>