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很多页面用到的模态对话框,如知明网站https://dig.chouti.com/的登录页都是模态对话框,

当点登录时,是用的ajax提交,因为输入错了信息,有返回消息,而页面没有刷新。

jquery ajax格式: 

$.ajax({
'url':'/orm',
'type':'post',
'data':{'id':1,'name':'hhh'},
success:function (data) {
alert(data);
}
})
url是提交到那个地址  type是提交方法  data是要提交的数据集合,可使用变量如:$('#id').val(),可一句话提交一个表单里的所有值 如:'data':$('#f1').serialize(),
sucess:是服务成功返回数据时要执行的函数,服务器没返回数据时,这个函数不会执行,形参data,一定要带,即是返回的数据。
提交给orm操作后 常用Httprespones返回一个字符串json格式,再用json解析 ,不能用redirect,用render也没大用

这样我们在任何地方就可以用ajax提交数据到后台了,而页面不用刷新,一个简单标签即可提交,如:
$('#ajax_submit').click(function () {
$.ajax({
'url':'/orm',
'type':'post',
'data':{'id':1,'name':'hhh'},
success:function (data) {
alert(data);
}
})
})
例子:点击添加出现模态对话框,如果ip或端口格式不对,ajax提交立即返回错误提示不刷新。勾选1,3,5删除一次性删除并生效显示。


 

#models
from django.db import models
# Create your models here.
class host(models.Model):
    ip = models.CharField(max_length=255)
    port = models.IntegerField()
    group_code = models.ForeignKey(to='group',to_field='code',default='hr',on_delete='code')
class group(models.Model):
    code = models.CharField(max_length=30,default='hr',unique=True)
    name = models.CharField(max_length=255)

#views
from django.shortcuts import render,HttpResponse,redirect
from cmbd import models
import json
def home(request):
    return HttpResponse('<h1>home</h1>')
def orm(request):
    # models.host.objects.create(ip="1.1.1.1",port=80,code='market')
    #models.host.objects.create(ip="1.1.1.6",port=88,group_code_id='dev')
    # models.group.objects.create(code="dev",name="开发部")
    # dic = {'code':'dep','name':"工程部"}
    # models.group.objects.create(**dic)
    if request.method == 'GET':
        cmd =  request.GET.get('orm')
        if cmd == 'add_host':
            ip = request.GET.get('ip')
            port = request.GET.get('port')
            group_code = request.GET.get('group_code')
            if ip and port:
  models.host.objects.create(ip=ip,port=port,group_code_id=group_code)
            else:
                return HttpResponse('error')
            return redirect('/list')
    else:
        cmd = request.POST.get('orm')
        if cmd == 'del_host':
            host_id = request.POST.get('host_id')
            if host_id:
                models.host.objects.filter(id=host_id).delete()
            return HttpResponse('success')
        elif cmd == 'add_host':
            ip = request.POST.get('ip')
            port = request.POST.get('port')
            group_code = request.POST.get('group_code')
            if ip and port:
                models.host.objects.create(ip=ip,port=port,group_code_id=group_code)
            else:
                return HttpResponse('error')
            return HttpResponse('success')
        elif cmd == 'edit_host':
            id = request.POST.get('id')
            ip = request.POST.get('edit_ip')
            port = request.POST.get('edit_port')
            group_code = request.POST.get('edit_group_code')
            if ip and port:               models.host.objects.filter(id=id).update(ip=ip,port=port,group_code_id=group_code)
            else:
                return HttpResponse('error')
            return redirect('/list')
    return render(request,'orm.html')

def list(request):
    v1 = models.host.objects.all()
    v2 = models.group.objects.all()
    return render(request,'list.html',{'v1':v1,'v2':v2})

def test_ajax(request):
    ret = {"status":"true","data":"none","error":"none"}
    try:
        ip = request.POST.get('ip')
        port = request.POST.get('port')
        group_code = request.POST.get('group_code')
        if len(ip) < 4:
            ret["status"] = "false"
            ret["error"] = "ip addr error"
    except Exception as e:
        pass
    return HttpResponse(json.dumps(ret))

#templates
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        td a{
            cursor: pointer;
        }
        .hide{
            display: none;
        }
        .shade{
            position: fixed;
            top:0;
            left:0;
            right:0;
            bottom:0;
            background-color: black;
            opacity:0.6;
            z-index: 99;
        }
        .add_model{
            height:400px;
            width:600px;
            position: fixed;
            left: 50%;
            top: 50%;
            margin-left: -300px;
            margin-top: -200px;
            background-color: white;
            border: 1px solid greenyellow;
            z-index: 100;
        }
    </style>
</head>
<body>
<div id="shade" class="shade hide"></div>
<div id="add_model" class="add_model hide">
<form action="/orm" method="get" id="f1">
    <table border="1px">
        <thead><td>IP</td><td>端口</td><td>组别</td></thead>
        <tr>
            <td><input name="ip" type="text"/></td>
            <td><input name="port" type="text"/></td>
            <td>
                <select name="group_code">
                    {% for i in v2 %}
                    <option value="{{ i.code }}">{{ i.name }}</option>
                    {% endfor %}
                </select>
            </td>
        </tr>
    </table>
    <label id="msg" class="hide"></label>
    <input type="text" style="display: none;" name="orm" value="add_host"/>
    <input class="host_cancel" type="button" value="取消" style="position: absolute;bottom: 0;right: 123px;"/>
    <input id="add_host_ack" type="submit" value="确定" style="position: absolute;bottom: 0;right: 0;"/>
    <input id="ajax_submit" type="button" value="ajax提交" style="position: absolute;bottom: 0;right: 50px;"/>
</form>
</div>
<div id="edit_model" class="add_model hide">
<form action="/orm" method="post" id="f2">
    <table border="1px">
        <thead><td>IP</td><td>端口</td><td>组别</td></thead>
        <tr>
            <td><input name="edit_ip" type="text"/></td>
            <td><input name="edit_port" type="text"/></td>
            <td>
                <select name="edit_group_code">
                    {% for i in v2 %}
                    <option value="{{ i.code }}">{{ i.name }}</option>
                    {% endfor %}
                </select>
            </td>
        </tr>
    </table>
    <label id="edit_msg" class="hide"></label>
    <input type="text" class="hide" name="id"/>
    <input type="text" style="display: none;" name="orm" value="edit_host"/>
    <input class="host_cancel" type="button" value="取消" style="position: absolute;bottom: 0;right: 50px;"/>
    <input type="submit" value="确定" style="position: absolute;bottom: 0;right: 0;"/>
</form>
</div>
<h1>主机列表:</h1>
<form>
    <input type="button" id="add_host" value="添加">
    <input type="button" id="del_host" value="删除">
    <input type="button" id="select_all" value="全选">
    <input type="button" id="cancel_all" value="取消">
    <input type="button" id="revert" value="反选">
</form>
<table border="1" id="t1">
    <thead><td>选择</td><td>序号</td><td>IP</td><td>端口</td><td>部门</td><td>操作</td></thead>
    {% for i in v1 %}
        <tr host_id="{{ i.id }}" group_code="{{ i.group_code_id }}">
            <td><input type="checkbox"/></td>
            <td>{{ forloop.counter }}</td><td>{{ i.ip}}</td><td>{{ i.port}}</td><td>{{ i.group_code.name}}</td><td><a class="del_single">删除</a>|<a class="edit_host">修改</a></td>
        </tr>
    {% endfor %}
</table>
<h1>组列表:</h1>
<table border="1" id="t2">
        <thead><td>序号</td><td>代码</td><td>组名</td></thead>
    {% for i in v2 %}
        <tr group_id="{{ i.id }}"><td>{{ forloop.counter}}</td><td>{{ i.code}}</td><td>{{ i.name}}</td></tr>
    {% endfor %}
</table>

<script src="/static/jquery-3.3.1.js"></script>
<script>
    $(function () {
        $('#add_host').click(function () {
            $("#shade,#add_model").removeClass("hide");
        })
        $('.host_cancel').click(function () {
            $(".shade,.add_model").addClass("hide");
        })
        $('#select_all').click(function () {
            $('#t1 input[type="checkbox"]').prop("checked", true);
        })
        $('#cancel_all').click(function () {
            $('#t1 input[type="checkbox"]').prop("checked", false);
        })
        $('#revert').click(function () {
            $('#t1 input[type="checkbox"]').each(function () {
                if($(this).prop('checked')){
                    $(this).prop('checked',false);
                }else {
                    $(this).prop('checked',true);
                }
            });
        })
        $('#del_host').click(function () {
            $('#t1 input[type="checkbox"]').each(function () {
                if($(this).prop('checked')){
                    host_id = $(this).parent().parent().attr('host_id');
                    $.ajax({
                        'url':'/orm',
                        'type':'post',
                        'data':{'orm':'del_host','host_id':host_id},
                        success:function (data) {
                            console.log(data);
                            location.reload();
                        }
                    })
                }
            });
        })
        $('#ajax_submit').click(function () {
            $.ajax({
                'url':'/test_ajax',
                'type':'post',
                'data':$("#f1").serialize(),
                success:function (data) {
                    obj = JSON.parse(data)
                    if(obj.status=='true'){
                        $('#msg').removeClass('hide').text(obj.data);
                        location.reload();
                    }else {
                        $('#msg').removeClass('hide').text(obj.error);
                    }
                }
            })
        })
        $(".del_single").click(function () {
            host_id = $(this).parent().parent().attr('host_id');
            $(this).parent().parent().remove();
            $.ajax({
                'url':'/orm',
                'type':'post',
                'data':{'orm':'del_host','host_id':host_id},
                success:function (data) {
                    alert(data);
                }
            })
        })
        $(".edit_host").click(function () {
            group_code = $(this).parent().parent().attr('group_code');
            host_id = $(this).parent().parent().attr('host_id');
            ip = $(this).parent().parent().children().eq(2).text();
            port = $(this).parent().parent().children().eq(3).text();
            console.log(host_id,ip,port);
            $("#shade,#edit_model").removeClass("hide");
            $("#f2 select[name='edit_group_code']").val(group_code);
            $("#f2 input[name='edit_ip']").val(ip);
            $("#f2 input[name='edit_port']").val(port);
            $("#f2 input[name='id']").val(host_id);
        })

    })
</script>
</body>
</html>
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