ajax结合sweetalert实现删除按钮的提示功能

前端

1、下载插件:Bootstrap-sweetalert

2、只需要用到其中的dist文件,在前端导入即可(配置static动态绑定)

3、sweetalert的swal用于提示

示例:

<!--index.html-->
<!--js代码-->
<script>
    $('.delete').click(function () {
        var $btn = $(this);
        swal({
                title: "你确定要删吗?",
                text: "你如果删了,你就准备好直接跑路吧!",
                type: "warning",
                showCancelButton: true,
                confirmButtonClass: "btn-danger",
                confirmButtonText: "是的,老子就要删!",
                cancelButtonText: "算了算了,不敢!",
                closeOnConfirm: false,
                closeOnCancel: false,
                showLoaderOnConfirm: true
            },
            function (isConfirm) {
                if (isConfirm) {
                    // 朝后端发送ajax请求
                    console.log(isConfirm);
                    $.ajax({
                        url: '',
                        type: 'post',
                        data: {'delete_id': $btn.attr('deleteId')},
                        success: function (data) {
                            if (data.code == 0) {

                                swal("准备跑路把!", data.msg, "success");
                                // 通过DOM操作 来直接操作标签
                                $btn.parent().parent().remove()
                            } else {
                                swal("有Bug", "发什么了未知的错误!", "warning");
                            }
                        }
                    });
                } else {
                    swal("怂逼", "数据都不敢删", "error");
                }
            });
    })
</script>

代码中的注意点:

1、给可删除的标签添加类delete,绑定事件click

2、下面是编写事件程序的注意点:

通过$(this)得到当前标签

3、要回传当前数据的id给服务器,通过设置标签自定义属性deleteId={{obj.id}}

4、通过$(this).attr('deleteId')获取要删除的数据id

5、通过DOM操作,实现局部的数据交互更新,但整个页面并不刷新

后端

def index(request):
    if request.is_ajax():
        back_dic = {'code': 0, 'msg': ''}
        delete_id = request.POST.get('delete_id')
        time.sleep(2)
        models.User.objects.filter(pk=delete_id).delete()
        back_dic['msg'] = '数据已经被我删掉了'
        return JsonResponse(back_dic)
    user_queryset = models.User.objects.all()
    return render(request,'index.html',locals())

注意点:

发送数据格式为JsonResponse,

用法见类的注释

注意点:

1、分页数据是通过总数据切片而来,queryset对象支持正数索引和正向步长,不支持负数

2、获取页面请求为get,参数为page

temp = '[%s](?page=%s)' % (i, i,)
class Pagination(object):
    def __init__(self,current_page,all_count,per_page_num=2,pager_count=11):
        """
        封装分页相关数据
        :param current_page: 当前页
        :param all_count:    数据库中的数据总条数
        :param per_page_num: 每页显示的数据条数
        :param pager_count:  最多显示的页码个数
        
        用法:
        queryset = model.objects.all()
        page_obj = Pagination(current_page,all_count)
        page_data = queryset[page_obj.start:page_obj.end]
        获取数据用page_data而不再使用原始的queryset
        获取前端分页样式用page_obj.page_html
        """
        try:
            current_page = int(current_page)
        except Exception as e:
            current_page = 1

        if current_page <1:
            current_page = 1

        self.current_page = current_page

        self.all_count = all_count
        self.per_page_num = per_page_num


        # 总页码
        all_pager, tmp = divmod(all_count, per_page_num)
        if tmp:
            all_pager += 1
        self.all_pager = all_pager

        self.pager_count = pager_count
        self.pager_count_half = int((pager_count - 1) / 2)

    @property
    def start(self):
        return (self.current_page - 1) * self.per_page_num

    @property
    def end(self):
        return self.current_page * self.per_page_num

    def page_html(self):
        # 如果总页码 < 11个:
        if self.all_pager <= self.pager_count:
            pager_start = 1
            pager_end = self.all_pager + 1
        # 总页码  > 11
        else:
            # 当前页如果<=页面上最多显示11/2个页码
            if self.current_page <= self.pager_count_half:
                pager_start = 1
                pager_end = self.pager_count + 1

            # 当前页大于5
            else:
                # 页码翻到最后
                if (self.current_page + self.pager_count_half) > self.all_pager:
                    pager_end = self.all_pager + 1
                    pager_start = self.all_pager - self.pager_count + 1
                else:
                    pager_start = self.current_page - self.pager_count_half
                    pager_end = self.current_page + self.pager_count_half + 1

        page_html_list = []
        # 添加前面的nav和ul标签
        page_html_list.append('''
                    <nav aria-label='Page navigation>'
                    <ul class='pagination'>
                ''')
        first_page = '<li><a href="?page=%s">首页</a></li>' % (1)
        page_html_list.append(first_page)

        if self.current_page <= 1:
            prev_page = '<li class="disabled"><a href="#">上一页</a></li>'
        else:
            prev_page = '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,)

        page_html_list.append(prev_page)

        for i in range(pager_start, pager_end):
            if i == self.current_page:
                temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,)
            else:
                temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,)
            page_html_list.append(temp)

        if self.current_page >= self.all_pager:
            next_page = '<li class="disabled"><a href="#">下一页</a></li>'
        else:
            next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,)
        page_html_list.append(next_page)

        last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
        page_html_list.append(last_page)
        # 尾部添加标签
        page_html_list.append('''
                                           </nav>
                                           </ul>
                                       ''')
        return ''.join(page_html_list)

bulk_create批量插入数据

  1. bulk_create用于批量插入数据,解决大量插入数据耗时长的问题
  2. 先用列表生成数据,再通过bulk_create批量插入数据
def index(request):
    book_list = []
    for i in range(10000):
        book_list.append(models.Book(title=f'第{i}本书'))
    # 批量插入数据
  models.Book.objects.bulk_create(book_list)
    book_queryset = models.Book.objects.all()
    return  render(request,'index.html',locals())

循环插入数据测试

# ORM 帮我们提供了循环插入数据更快捷的方法:
book_list = []
for i in range(1000):
    book_list.append(models.Book(title='第%s本书'%i))
    models.Book.objects.bulk_create(book_list)