Django + JQuery + ajax实时显示数据

小程序：扫一扫查出行
【扫一扫了解最新限行尾号】
复制小程序

1 创建django项目：NowtimeData and APP ：Demo

>>django-admin startproject NowtimeData

>>python manage.py startapp Demo

2 配置settings.py

①插入Demo

②配置模板路径

----BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

----TEMPLATES = [

'DIRS': [os.path.join(BASE_DIR, 'templates').replace('\\', '/')], # 修改模板目录 ]

----STATIC_URL = '/static/'

STATIC_ROOT = os.path.join(BASE_DIR, 'static_collected')

----补充

　　# LANGUAGE_CODE = 'en-us'
　　LANGUAGE_CODE = 'zh-hans'  # 简体中文

　　# TIME_ZONE = 'UTC'
　　TIME_ZONE = 'Asia/Shanghai'  # 时区

③在APP Demo里创建templates和static，templates里新建ajax_test.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/api/ajax/" method="get">

        a:<input type="text" name="a" id="a"><br>
        b:<input type="text" name="b" id="b"><br>
        <p>温度:<span id="temp"></span></p>
        <p>湿度:<span id="hum"></span></p>
        <button type="button" id="sum">Calc</button>
    </form>

    <script src="http://apps.bdimg.com/libs/jquery/1.11.1/jquery.min.js"></script>
    <script>

    setInterval(function () {

    $(document).ready(function () {

               var a = $('#a').val();
               var b = $('#b').val();

               //add是urls.py里的路由
               $.get("/api/ajax/", {'a':a, 'b':b}, function (ret) {
                   //console.log(typeof ret);
                   var data = JSON.parse(ret);
                   //console.log(data[0]["fields"]);

                   //console.log(typeof Number(data[0]["fields"]["temp"]));
                   temp = Number(data[0]["fields"]["temp"]).toFixed(1);
                   hum = Number(data[0]["fields"]["hum"]).toFixed(1);
                   $("#temp").html(temp);
                   $("#hum").html(hum);
               })

        });
},1000);
    </script>
</body>
</html>

或者通过点击事件来触发

<script>

$(document).ready(function () {
     $("#sum").click(function () {
         var d = $('#d').val();
         var e = $('#e').val();
         //add是urls.py里的路由
         $.get("/add/", {'d': d, 'e': e}, function (ret) {
             {#console.log(typeof ret);#}
             console.log(ret);
             $("#result").html(ret);
         })
     })

    });

</script>

④在view.py中编辑代码

　　def adder(request):
   　　 # a = request.GET['a']
   　　 # b = request.GET['b']
 　　   # a = random.randint(1, 10)
  　　  # b = random.randint(1, 10)
  　　  # c = int(a)+int(b)
   　　 return render(request, 'ajax_test.html')

⑤建立数据api接口 api.py

from rest_framework import serializers
from rest_framework.response import Response
from rest_framework.decorators import api_view
from website.models import Room, Recv_data, Send_data  # 得到数据库
from django.http import HttpResponse, JsonResponse

class Room_Admin(serializers.ModelSerializer):
    class Meta:
        depth = 1
        model = Room
        fields = '__all__'

class Recv_Admin(serializers.ModelSerializer):
    class Meta:
        depth = 1
        model = Recv_data
        fields = '__all__'

class Send_Admin(serializers.ModelSerializer):
    class Meta:
        depth = 1
        model = Send_data
        fields = '__all__'

from django.core.serializers import serialize
@api_view(['GET', 'POST'])
def ajaxData(request):        # 在url.py里添加路由

    # 房间管理
    room_data = Room.objects.all()
    roomData= Room_Admin(room_data, many=True)

    recv_data = Recv_data.objects.all()
    recvData = Recv_Admin(recv_data, many=True)

    send_data = Send_data.objects.all()
    sendData = Send_Admin(send_data, many=True)

    room2_info = Recv_data.objects.filter(floor=2)
    room3_info = Recv_data.objects.filter(floor=3)
    room4_info = Recv_data.objects.filter(floor=4)
    room5_info = Recv_data.objects.filter(floor=5)
    room6_info = Recv_data.objects.filter(floor=6)
    room2_info = serialize('json', room2_info, fields=['room', 'temp', 'status', 'mode', 'level', 'hum', 'co2', 'pm25', 'tvoc'])
    room3_info = serialize('json', room3_info, fields=['room', 'temp', 'status', 'mode', 'level', 'hum', 'co2', 'pm25', 'tvoc'])
    room4_info = serialize('json', room4_info, fields=['room', 'temp', 'status', 'mode', 'level', 'hum', 'co2', 'pm25', 'tvoc'])
    room5_info = serialize('json', room5_info, fields=['room', 'temp', 'status', 'mode', 'level', 'hum', 'co2', 'pm25', 'tvoc'])
    room6_info = serialize('json', room6_info, fields=['room', 'temp', 'status', 'mode', 'level', 'hum', 'co2', 'pm25', 'tvoc'])
    # print(room2_info)

    # return Response({'room_admin': roomData.data, 'recv_data': recvData.data, 'send_data': sendData.data})
    # return HttpResponse(str({'room_admin': roomData.data, 'recv_data': recvData.data, 'send_data': sendData.data}))
    return HttpResponse(room2_info)

⑥ 添加url.py

path('add/', views.adder),

path('api/ajax/', api.ajaxData),

⑦补充js for循环写数据

 setInterval(function () {

    $(document).ready(function () {

               var a = $('#a').val();
               var b = $('#b').val();

               //add是urls.py里的路由
               $.get("/api/ajax/", {'a':a, 'b':b}, function (ret) {
                   //console.log(typeof ret);
                   var data = JSON.parse(ret);
                   //console.log(data[0]["fields"]);
                   function room(room, a){

                        var temp = Number(data[a]["fields"]["temp"]).toFixed(1);
                        var status = data[a]["fields"]["status"];
                        if (status=='0'){
                            status="关";
                            $("#"+room).css({"background": "green"});
                            }
                        else if (status=='1'){
                            status='开';
                            $("#"+room).css({"background": "grey"});

                        }
                        else {
                            status='未知';
                            $("#"+room).css({"background": "purple"});
                        }
                        $("#temp_"+room).html(temp);
                        $("#status_"+room).html(status);

                    }

                   for (var i=8206;i<8230;i++){
                       room(i,i-8201)
                   }

               })

        });
},1000);