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
- bulk_create用于批量插入数据,解决大量插入数据耗时长的问题
- 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)