orm_lx2_optimize.__init__.py
import pymysql pymysql.install_as_MySQLdb()
orm_lx2_optimize.settings.py
INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'app01.apps.App01Config', # app01应用注册 ] TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')], 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', ], }, }, ] DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': '20211204', 'HOST': '127.0.0.1', 'PORT': 3306, 'USER': 'root', 'PASSWORD': '123456' } } STATICFILES_DIRS = [ os.path.join(BASE_DIR, "statics"), ]
orm_lx2_optimize.urls.py
from django.contrib import admin from django.urls import path, include from app01 import views urlpatterns = [ path('admin/', admin.site.urls), path("check/", views.check), path("delete/<int:number>/", views.delete), path("add/", views.add), path("edit/<int:number>/", views.edit), ]
app01.models.py
class Author(models.Model): id = models.AutoField(primary_key=True) name = models.CharField(max_length=32) age = models.IntegerField() gender = models.CharField(max_length=32) birthday = models.DateField() class Publish(models.Model): id = models.AutoField(primary_key=True) pub_name = models.CharField(max_length=32) pub_city = models.CharField(max_length=32) pub_email = models.EmailField() class Book(models.Model): id = models.AutoField(primary_key=True) title = models.CharField(max_length=32) price = models.DecimalField(max_digits=6, decimal_places=2) pub_date = models.DateField() publish = models.ForeignKey(to="Publish", to_field="id", on_delete=models.CASCADE) authors = models.ManyToManyField(to="Author") # 作者和出版社表，需自行手动添加几条数据
app01.views.py
from django.shortcuts import render, redirect from app01.models import * # Create your views here. def check(request): book_obj = Book.objects.filter().all() return render(request, "check.html", locals()) def delete(request, number): Book.objects.filter(id=number).delete() return redirect("http://127.0.0.1:8000/check/") def add(request): if request.method == "GET": publish_list = Publish.objects.filter().all() author_list = Author.objects.filter().all() return render(request, "add.html", locals()) # 先添加Book表的数据信息 book_obj = Book.objects.create( title=request.POST.get("title"), price=request.POST.get("price"), pub_date=request.POST.get("pub_date"), publish_id=request.POST.get("publish"), ) # 获取到选择作者的id的列表 author_list = request.POST.getlist("author") # 多对多的关系绑定 book_obj.authors.add(*author_list) return redirect("http://127.0.0.1:8000/check/") def edit(request, number): book_obj = Book.objects.filter(id=number).first() if request.method == 'GET': publish_list = Publish.objects.filter().all() author_list = Author.objects.filter().all() return render(request, "edit.html", locals()) # 先修改Book表的数据信息 Book.objects.filter(id=number).update( title=request.POST.get("title"), price=request.POST.get("price"), pub_date=request.POST.get("pub_date"), publish_id=request.POST.get("publish"), ) # 获取到修改后作者的id的列表 author_list = request.POST.getlist("author") # 多对多关系的重新设置 book_obj.authors.set(author_list) return redirect("http://127.0.0.1:8000/check/")
templates.check.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>查看书籍</title> <link rel="stylesheet" href="/static/bootstrap-3.4.1-dist/css/bootstrap.min.css"> <script src="/static/bootstrap-3.4.1-dist/js/bootstrap.min.js"></script> <script src="/static/jQuery3.6.js"></script> <style> table { margin-top: 70px; } </style> </head> <body> <div class="container"> <div class="row"> <div class="col-md-10 col-md-offset-1"> <h3>查看书籍</h3> <button class="btn btn-success pull-right"><a href="http://127.0.0.1:8000/add/">添加书籍</a></button> <table class="table table-bordered"> <thead> <tr> <th class="text-center">编号</th> <th class="text-center">书籍名称</th> <th class="text-center">书籍价格(元)</th> <th class="text-center">出版日期</th> <th class="text-center">出版社</th> <th class="text-center">作者</th> <th class="text-center">编辑操作</th> <th class="text-center">删除操作</th> </tr> </thead> <tbody> {# 传过来的是QuerySet对象，直接for循环取到每一个model对象，然后通过.的方式进行取值 #} {% for book in book_obj %} <tr class="text-center"> <td>{{ forloop.counter }}</td> <td>{{ book.title }}</td> <td>{{ book.price }}</td> <td>{{ book.pub_date|date:'Y-m-d' }}</td> <td>{{ book.publish.pub_name }}</td> <td> {# 通过连表的正向查询，查到当前书籍的所有作者，返回值是QuerySet对象 #} {% for author in book.authors.all %} {# 如果是最后一个值，那么后面不加',' #} {% if forloop.last %} <span>{{ author.name }}</span> {% else %} <span>{{ author.name }},</span> {% endif %} {% endfor %} </td> <td> <button class="btn btn-sm btn-warning"><a href="http://127.0.0.1:8000/edit/{{ book.id }}/">编辑</a></button> </td> <td> <button class="btn btn-sm btn-danger"><a href="http://127.0.0.1:8000/delete/{{ book.id }}/">删除</a></button> </td> </tr> {% endfor %} </tbody> </table> </div> </div> </div> </body> </html>
templates.add.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>添加书籍</title> <link rel="stylesheet" href="/static/bootstrap-3.4.1-dist/css/bootstrap.min.css"> <script src="/static/bootstrap-3.4.1-dist/js/bootstrap.min.js"></script> <script src="/static/jQuery3.6.js"></script> </head> <body> <div class="container"> <div class="row"> <div class="col-md-8 col-md-offset-2"> <h3>添加书籍</h3> <form action="" method="post"> {% csrf_token %} <div class="form-group"> <label for="i1">书籍名称</label> <input type="text" name="title" id="i1" class="form-control"> </div> <div class="form-group"> <label for="i2">书籍价格</label> <input type="text" name="price" id="i2" class="form-control"> </div> <div class="form-group"> <label for="i3">出版日期</label> <input type="date" name="pub_date" id="i3" class="form-control"> </div> <div class="form-group"> <label for="i4">出版社</label> <select name="publish" id="i4" class="form-control"> {# publish_list是一个QuerySet对象，通过for循环取到每一个model对象，然后通过.进行取值 #} {% for publish in publish_list %} <option value="{{ publish.id }}">{{ publish.pub_name }}</option> {% endfor %} </select> </div> <div class="form-group"> <label for="i5">作者</label> <select name="author" id="i5" class="form-control" multiple> {# author_list是一个QuerySet对象，通过for循环取到每一个model对象，然后通过.进行取值 #} {% for author in author_list %} <option value="{{ author.id }}">{{ author.name }}</option> {% endfor %} </select> </div> <input type="submit" class="btn btn-success btn-block"> </form> </div> </div> </div> </body> </html>
templates.edit.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>编辑书籍</title> <link rel="stylesheet" href="/static/bootstrap-3.4.1-dist/css/bootstrap.min.css"> <script src="/static/bootstrap-3.4.1-dist/js/bootstrap.min.js"></script> <script src="/static/jQuery3.6.js"></script> </head> <body> <div class="container"> <div class="row"> <div class="col-md-8 col-md-offset-2"> <h3>编辑书籍</h3> <form action="" method="post"> {% csrf_token %} {# book_obj是一个model对象，可以直接用.进行取值 #} <div class="form-group"> <label for="i1">书籍名称</label> <input type="text" name="title" id="i1" class="form-control" value="{{ book_obj.title }}"> </div> <div class="form-group"> <label for="i2">书籍价格</label> <input type="text" name="price" id="i2" class="form-control" value="{{ book_obj.price }}"> </div> <div class="form-group"> <label for="i3">出版日期</label> <input type="date" name="pub_date" id="i3" class="form-control" value="{{ book_obj.pub_date|date:'Y-m-d' }}"> </div> <div class="form-group"> <label for="i4">出版社</label> <select name="publish" id="i4" class="form-control"> {% for publish in publish_list %} {# 如果当前循环的publish对象和book_obj.publish的对象相等，那么就加上selected属性(默认选中) #} {# book_obj.publish取出来的是一个对象，book_obj.publish_id取出来的是具体值 #} {% if publish == book_obj.publish %} <option value="{{ publish.id }}" selected>{{ publish.pub_name }}</option> {% else %} <option value="{{ publish.id }}">{{ publish.pub_name }}</option> {% endif %} {% endfor %} </select> </div> <div class="form-group"> <label for="i5">作者</label> <select name="author" id="i5" class="form-control" multiple> {% for author in author_list %} {# book_obj.authors.all是连表的正向查询，查出当前书籍的所有作者的对象，结果是QuerySet #} {# 如果循环的author对象在查询结果列表中，那么就加上selected属性 #} {% if author in book_obj.authors.all %} <option value="{{ author.id }}" selected>{{ author.name }}</option> {% else %} <option value="{{ author.id }}">{{ author.name }}</option> {% endif %} {% endfor %} </select> </div> <input type="submit" class="btn btn-block btn-success"> </form> </div> </div> </div> </body> </html>