models.py
class UserInfo(models.Model): username = models.CharField(max_length=64,db_column=‘username‘) passwd = models.CharField(max_length=64,db_column=‘password‘) register_date = models.DateTimeField(max_length=32,db_column=‘register_date‘) last_login_date = models.DateTimeField(max_length=32,db_column=‘last_login_date‘,null=True) class Meta: app_label = ‘simple‘ db_table = ‘user_info‘ class ServerInfo(models.Model): hostname = models.CharField(max_length=32,db_column=‘hostname‘) port = models.IntegerField(max_length=32,db_column=‘port‘) status = models.CharField(max_length=32,db_column=‘status‘) class Meta: app_label = ‘simple‘ db_table = ‘server_info‘ class Publisher(models.Model): name = models.CharField(max_length=32) address = models.CharField(max_length=32) state = models.CharField(max_length=32) nation = models.CharField(max_length=32) website = models.URLField(max_length=32) class Author(models.Model): first_name = models.CharField(max_length=32) last_name = models.CharField(max_length=32) email = models.EmailField() class Book(models.Model): title = models.CharField(max_length=32,unique=True) author = models.ManyToManyField(Author) publisher = models.ForeignKey(Publisher) pubDate = models.CharField(max_length=32)
views.py
def addBook(request): if request.method == ‘POST‘: print("进入addbook post") print(request.POST) name = request.POST[‘name‘] author = request.POST.getlist(‘author‘)# 当获取多个数值的时候,使用getlist publisher = request.POST[‘publisher‘] p1 = Publisher.objects.get(id=publisher)#先在publisher表中查询出前端选中出版社对应的对象 date = request.POST[‘publisherDate‘] b1 = Book(title=name,publisher=p1,pubDate=date) b1.save()#普通插入的数据和外键插入的数据需要先save() b1 = Book.objects.get(title=name)#查出书名对象,也就是获取要插入的多对多数据项 if len(author) == 1: b1.author.add(author[0])#多对多使用add方法进行插入 b1.save() return redirect("/displayBook/") elif len(author) == 0:#当用户没有选中作者 return render(request,‘addBook.html‘,{"status":"添加出版社失败,没有选择作者"}) else:#循环插入用户选中的多个作者 for person in author: b1.author.add(person)#多对多使用add方法进行插入 b1.save() return redirect("/displayBook/") print("进入addbook get") #用户从库中获取页面可选的内容,get请求 bookList = Book.objects.all() publisherList = Publisher.objects.all() authorList = Author.objects.all() print(bookList,publisherList,authorList) return render(request, ‘addBook.html‘,{‘books‘:bookList, ‘publishers‘:publisherList, ‘authors‘:authorList})
前端页面:
{% block head-menu %} <table border=1 style="margin-left:13%;margin-top: 3%;height: 30px;width: 1000px"> <tr > <td>书名</td> <td>作者</td> <td>出版社</td> <td>出版日期</td> </tr> {% for book in books %} {% if forloop.counter|divisibleby:"2" %} <tr style="background-color: skyblue;"> <td>{{ book.title }}</td> <td>{% for authorObj in book.author.select_related %} {{ authorObj.first_name }} {{ authorObj.last_name }} {% endfor %}</td> <td>{{ book.publisher.name }}</td> <td>{{ book.pubDate }}</td> </tr> </tr> </tr> {% else %} <tr style="background-color: salmon;"> <td>{{ book.title }}</td> <td>{% for authorObj in book.author.select_related %} {{ authorObj.first_name }} {{ authorObj.last_name }} {% endfor %}</td> <td>{{ book.publisher.name }}</td> <td>{{ book.pubDate }}</td> </tr> {% endif %} {% endfor %} </table> <a href="/backend/"><button type="button" class="btn btn-primary btn-sm" style="margin-left: 43%;margin-top: 10%">返回</button></a> {% endblock %}
时间: 2024-10-04 12:44:39