书籍

创建书籍表

# 书籍

class BOOES(models.Model):
    name = models.CharField(max_length=20, unique=True)
    pub = models.ForeignKey('Press', on_delete=models.CASCADE)
　　# Press :出版社表,默认关联主键,'Press':以反射的方式取得类,会自动添加_id ,比如:pub_id
　　# on_delete=models.CASCADE :级联删除,Django1.0 此参数为默认值,Django2.0 必填

数据库迁移

python manage.py makemigrations  # 将models变更记录保存到migrations
python manage.py migrate    # 将变更同步到数据库中

在urls.py下添加url

# 展示书籍
    url(r'^book/', views.book),

展示书籍在views.py中写入函数,没有优化

# 展示书籍
def book(request):
    # 获取书籍信息
    all_book = models.Book.objects.all()

    # for book in all_book:
    #     print(book) #对象
    #     print(book.pk)  #ID
    #     print(book.name) #字段
    #     print(book.pub) #取得的是书籍关联出版社的对象
    #     print(book.pub.name) #字段
    #     print(book.pub.pk) 
    #     print(book.pub_id) #与pub.name相同,推荐此方法
    #     print('*' * 20)

    return render(request, 'book.html', {"books": all_book})

添加书籍

# 添加书籍
    url(r'^add_book/', views.add_book),

# 添加书籍
def add_book(request):
    if request.method == 'POST':
        # 获取提交的数据
        new_name = request.POST.get('new_name')
        pub_id = request.POST.get('pub_id')

        # 插入到数据库中
        # pub_obj = models.Publisher.objects.get(pk=pub_id)
        # models.Book.objects.create(name=new_name, pub=pub_obj)

        models.Book.objects.create(name=new_name, pub_id=pub_id)

        # 跳转到展示页面
        return redirect('/book/')

    # 查询所有的出版社信息
    all_pubs = models.Publisher.objects.all()

    return render(request, 'add_book.html', {'all_pubs': all_pubs})