django之ajax结合sweetalert使用，分页器和bulk_create批量插入 07

时间 2019-12-09

标签 django ajax 结合 sweetalert 使用分页 bulk create 批量插入栏目 Python 繁體版

原文原文链接

目录css

sweetalert插件

有这么一个需求：
当用户进行一个删除数据的操做时，弹出一个二次确认的动态框样式？
其实，这里就能够使用sweetalert插件实现。html

首先先下载该插件：Bootstrap-sweetalert项目前端

上图下载完毕，解压后找到dist文件夹，拷贝到当前项目的static文件夹下，导入此文件的两个文件，和bootstrap框架中的css、js文件导入方式相同。python

要引入的弹出框模板在这里：A beautiful "replacement" for JavaScript's alertjquery

示例：git

本示例选择的弹出框和模板以下：github

swal({
  title: "Are you sure?",
  text: "You will not be able to recover this imaginary file!",
  type: "warning",
  showCancelButton: true,
  confirmButtonClass: "btn-danger",
  confirmButtonText: "Yes, delete it!",
  cancelButtonText: "No, cancel plx!",
  closeOnConfirm: false,
  closeOnCancel: false
},
function(isConfirm) {
  if (isConfirm) {
    swal("Deleted!", "Your imaginary file has been deleted.", "success");
  } else {
    swal("Cancelled", "Your imaginary file is safe :)", "error");
  }
});

# models.py

from django.db import models
# Create your models here.
class User(models.Model):
    username = models.CharField(max_length=32)
    age = models.IntegerField()
    gender_choices = (
        (1,'male'),
        (2,'female'),
        (3,'others')
    )
    gender= models.IntegerField(choices=gender_choices)

# urls.py
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^home/', views.home,name='xxx'),
]

# views.py
from django.shortcuts import render

# Create your views here.
from app01 import models
from django.http import JsonResponse
def home(request):
    import time
    if request.is_ajax():
        back_dic={'code':1000,'msg':''}
        delete_id = request.POST.get('delete_id')
        time.sleep(3)
        models.User.objects.filter(pk=delete_id).delete()
        back_dic['msg']= '数据已经被删掉了！'
        return JsonResponse(back_dic)

    queryset_obj = models.User.objects.all()
    return render(request,'home.html',locals())

<!--home.html-->

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
    {% load static %}
    <link rel="stylesheet" href="{% static 'bootstrap-3.3.7/css/bootstrap.min.css' %}">
    <link rel="stylesheet" href="{% static 'dist/sweetalert.css' %}">
    <script src="{% static 'bootstrap-3.3.7/js/bootstrap.min.js' %}"></script>
    <script src="{% static 'dist/sweetalert.js' %}"></script>
    <style>
        div.sweet-alert h2{
            padding: 10px;
        }
    </style>
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <h2 class="text-center">数据显示</h2>
            <br>
            <table class="table table-striped table-bordered table-hover">
                <thead>
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th class="text-center">操做</th>
                </tr>
                </thead>
                <tbody>
                {% for userObj in queryset_obj %}
                    <tr>
                        <td>{{ forloop.counter }}</td>
                        <td>{{ userObj.usernmae }}</td>
                        <td>{{ userObj.age }}</td>
                        <td>{{ userObj.get_gender_display }}</td>
                        <td class="text-center">
                            {#href为空时，表明从新刷新页面，因此浏览器页面点击删除按钮弹出框转瞬即逝#}
                            <a href="" class="btn btn-primary btn-sm ">编辑</a>
                            {#在for循环内部不能使用id,由于id要惟一不重复，只能用class属性，因此给class加了一个cancel#}
                            <a href="#" class="btn btn-danger btn-sm cancel" userId={{ userObj.pk }}>删除</a>
                        </td>
                    </tr>
                {% endfor %}
                </tbody>
            </table>
        </div>
    </div>
</div>

<script>
    $('.cancel').click(function () {
        {#获取的是被点击的a标签对象#}
        var $btn=$(this);
        {#swal能够填三个参数，最后一个是控制弹出框小图标颜色的提示信息，有info和warning两种#}
        swal({
                title: "肯定？",
                text: "删除将不能恢复改文件了！",
                type: "warning",
                showCancelButton: true,
                confirmButtonClass: "btn-danger",
                confirmButtonText: "删除！",
                cancelButtonText: "不，取消!",
                closeOnConfirm: false,
                closeOnCancel: false,
                {#获取加速的动态#}
                showLoaderOnConfirm:true
            },
            function (isConfirm) {
                if (isConfirm) {
                    //朝后端发送ajax请求
                    $.ajax({
                        url:'',
                        type:'post',
                        data:{'delete_id':$btn.attr('userId')},
                        success:function (data) {
                            if (data.code==1000) {
                                 swal("删除成功！",data.msg,"success");
                                 // 经过DOM操做 来直接操做标签,删除标签tr,就是当前用户要删除的这条数据记录
                                 $btn.parent().parent().remove()
                            }
                        }
                    });
                } else {
                    swal("取消", "文件安全啦！ :)", "错误");
                }
            });
    })
</script>
</body>
</html>

bulk_create 批量插入数据

当要实现批量插入数据的时候，就能够bulk_create，能大幅度缩短插入的时间；ajax

def index(request):
    # 普通插入方式：
    # for i in range(1000):
    #         models.Book.objects.create(title='第%s本书'%i)
    # 使用bulk_create批量插入
    book_list = []
    for i in range(2000):
        book_list.append(models.Book(title='第%s本书'%i))
    models.Book.objects.bulk_create(book_list)  # 这里直接放的是列表
    book_queryset=models.Book.objects.all()
    return render(request,'index.html',locals())

<!--index.html-->

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
    <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/css/bootstrap.min.css">
    <script src="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>
 {% for book_obj in book_queryset %}
     <p>{{ book_obj.title }}</p>
 {% endfor %}
</body>
</html>

分页器

简易版本的分页器的推导

def index(request):

    # 获取用户想要查看的页码
    current_page = int(request.GET.get('page', 1))
    
    book_queryset = models.Book.objects.all() # 获取全部书籍对象
    book_num = book_queryset.count() # 统计全部书籍条数目
    book_page,more = divmod(book_num,10) # 统计书籍的分页
    per_page_num = 10 # 定义每页展现10条
    start_page = (current_page - 1) * per_page_num  # 每页其实条数
    end_page = current_page * per_page_num  # 每页终止的条数
    if more:
        book_page += 1

    html = ''
    xxx = current_page  # 对用户的当前选页赋值一个变量
    if current_page < 6:  
        xxx = 6  # 当用户选择小于6的数字，数字不会变成负数
    for i in range(xxx-5,xxx+6):  # 共展现给用户的指定的10页
        if current_page==i:
            # 将10页内容的标签以字符串的形式进行拼接，若是是当前页，显示激活态
            html+='<li class="active"><a href="?page=%s">%s</a></li>'%(i,i)  
        else:
            html+='<li><a href="?page=%s">%s</a></li>'%(i,i)  # 不是当前页的正常显示

    book_queryset=book_queryset[start_page:end_page]
    return render(request,'index.html',locals())

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
    {% load static %}
    <link rel="stylesheet" href="{% static 'bootstrap-3.3.7/css/bootstrap.min.css' %}">
    <link rel="stylesheet" href="{% static 'dist/sweetalert.css' %}">
    <script src="{% static 'bootstrap-3.3.7/js/bootstrap.min.js' %}"></script>
    <script src="{% static 'dist/sweetalert.js' %}"></script>

</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            {% for book_obj in book_queryset %}
                <p>{{ book_obj.title }}</p>
            {% endfor %}
            <nav aria-label="Page navigation">
                <ul class="pagination">
                    <li>
                        <a href="#" aria-label="Previous">
                            <span aria-hidden="true">&laquo;</span>
                        </a>
                    </li>
                        {{ html|safe }}
                    <li>
                        <a href="#" aria-label="Next">
                            <span aria-hidden="true">&raquo;</span>
                        </a>
                    </li>
                </ul>
            </nav>
        </div>
    </div>
</div>
</body>
</html>

自定义分页器的使用（组件）

类封装的组件，包括bootstrap中分页的框架也都封装进去了。数据库

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而再也不使用原始的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):
        # 若是总页码 < 11个：
        if self.all_pager <= self.pager_count:
            pager_start = 1
            pager_end = self.all_pager + 1
        # 总页码  > 11
        else:
            # 当前页若是<=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)

调用以上接口：django

# views.py

def index(request):
    book_queryset = models.Book.objects.all()
    # 自定义分页器的使用
    current_page = request.GET.get('page', 1)
    all_count = book_queryset.count()                                                        
    page_obj=Pagination(current_page,all_count,per_page_num=10,pager_count=5)
    page_queryset = book_queryset[page_obj.start:page_obj.end]
    return render(request,'index.html',locals())

// index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
    {% load static %}
    <link rel="stylesheet" href="{% static 'bootstrap-3.3.7/css/bootstrap.min.css' %}">
    <link rel="stylesheet" href="{% static 'dist/sweetalert.css' %}">
    <script src="{% static 'bootstrap-3.3.7/js/bootstrap.min.js' %}"></script>
    <script src="{% static 'dist/sweetalert.js' %}"></script>
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            {% for book_obj in page_queryset %}
                <p>{{ book_obj.title }}</p>
            {% endfor %}
            {{ page_obj.page_html|safe }}
        </div>
    </div>
</div>
</body>
</html>

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