冰凍三尺非一日之寒--web框架Django(三)

時間 2019-12-14

標籤冰凍三尺非一日之寒 web 框架 django 欄目 HTML 简体版

原文原文鏈接

第二十章： django（三，多對多）

一、Django請求的生命週期

路由系統 -> 視圖函數(獲取模板+數據-->渲染) -> 字符串返回給用戶

二、路由系統

/index/ -> 函數或類.as_view()

/detail/(\d+) -> 函數(參數) 或類.as_view()（參數）

/detail/(?P<nid>\d+) -> 函數(參數) 或類.as_view()（參數）

/detail/ -> include("app01.urls")

/detail/ name='a1' -> include("app01.urls")

- 視圖中：reverse

- 模板中：{% url "a1" %}

三、視圖

FBV：函數

def index(request,*args,**kwargs):

CBV：類

class Home(views.View):

def get(self,reqeust,*args,**kwargs):

獲取用戶請求中的數據：

request.POST.get

request.GET.get

reqeust.FILES.get()

# checkbox,

........getlist()

request.path_info

文件對象 = reqeust.FILES.get()

文件對象.name

文件對象.size

文件對象.chunks()

# <form 特殊的設置></form>

給用戶返回數據：

render(request, "模板的文件的路徑", {'k1': [1,2,3,4],"k2": {'name': '張揚','age': 73}})

redirect("URL")

HttpResponse(字符串)

四、模板語言

render(request, "模板的文件的路徑", {'obj': 1234, 'k1': [1,2,3,4],"k2": {'name': '張揚','age': 73}})

<html>

<body>

{% for i in k1 %}

{% endfor %}

{% for row in k2.keys %}

{% endfor %}

{% for row in k2.values %}

{% endfor %}

{% for k,v in k2.items %}

{{ k }} - {{v}}

{% endfor %}

</body>

</html>

五、ORM

a. 建立類和字段

class User(models.Model):

age = models.IntergerFiled()

name = models.CharField(max_length=10)#字符長度

Python manage.py makemigrations

python manage.py migrate

# settings.py 註冊APP

b. 操做

增

models.User.objects.create(name='qianxiaohu',age=18)

dic = {'name': 'xx', 'age': 19}

models.User.objects.create(**dic)

obj = models.User(name='qianxiaohu',age=18)

obj.save()

刪

models.User.objects.filter(id=1).delete()

改

models.User.objects.filter(id__gt=1).update(name='alex',age=84)

dic = {'name': 'xx', 'age': 19}

models.User.objects.filter(id__gt=1).update(**dic)

查

models.User.objects.filter(id=1,name='root')

models.User.objects.filter(id__gt=1,name='root')

models.User.objects.filter(id__lt=1)

models.User.objects.filter(id__gte=1)

models.User.objects.filter(id__lte=1)

models.User.objects.filter(id=1,name='root')

dic = {'name': 'xx', 'age__gt': 19}

models.User.objects.filter(**dic)

六、獲取單表單數據的三種方式( views.py )

def business(request):

v1 = models.Business.objects.all()

# QuerySet ,內部元素都是對象

v2 = models.Business.objects.all().values('id','caption')

# QuerySet ,內部元素都是字典

v3 = models.Business.objects.all().values_list('id','caption')

# QuerySet ,內部元素都是元組

return render(request, 'business.html', {'v1': v1,'v2': v2, 'v3': v3})

特別注意

# 獲取到的一個對象，若是不存在就報錯

models.Business.objects.get(id=1)

但能夠用下面的方式來獲取對象

對象或者None = models.Business.objects.filter(id=1).first()

from django.shortcuts import render, HttpResponse, redirect
from  app01 import models
import json


# Create your views here.
def business(request):
    v1 = models.Business.objects.all()

    v2 = models.Business.objects.all().values('id', 'caption', 'code')

    v3 = models.Business.objects.all().values_list('id', 'caption', 'code')

    return render(request, 'business.html', {'v1': v1, 'v2': v2, 'v3': v3})


def host(request):
    if request.method == "GET":
        v1 = models.Host.objects.filter(nid__gt=0)
        v2 = models.Host.objects.filter(nid__gt=0).values('nid', 'hostname', 'b_id', 'b__caption')
        v3 = models.Host.objects.filter(nid__gt=0).values_list('nid', 'hostname', 'b_id', 'b__caption')

        b_list = models.Business.objects.all()

        return render(request, 'host.html', {'v1': v1, 'v2': v2, 'v3': v3, 'b_list': b_list})

    elif request.method == "POST":

        h = request.POST.get('hostname')
        i = request.POST.get('ip')
        p = request.POST.get('port')
        b = request.POST.get('b_id')
        models.Host.objects.create(hostname=h,
                                   ip=i,
                                   port=p,
                                   b_id=b
                                   )
        return redirect('/host')


def test_ajax(request):

    ret = {'status': True, 'error': None, 'data': None}
    try:
        h = request.POST.get('hostname')
        i = request.POST.get('ip')
        p = request.POST.get('port')
        b = request.POST.get('b_id')
        if h and len(h) > 5:
            models.Host.objects.create(hostname=h,
                                           ip=i,
                                           port=p,
                                           b_id=b)
        else:
            ret['status'] = False
            ret['error'] = "過短了"
    except Exception as e:
        ret['status'] = False
        ret['error'] = '請求錯誤'
    return HttpResponse(json.dumps(ret))

views.py

View.py

 1 from django.db import models
 2 
 3 # Create your models here.
 4 
 5 class Business(models.Model):
 6     caption = models.CharField(max_length=32)
 7     code = models.CharField(max_length=32)
 8 
 9 class Host(models.Model):
10 
11     nid = models.AutoField(primary_key=True)
12     hostname = models.CharField(max_length=32,db_index=True)
13     ip = models.GenericIPAddressField(db_index=True)
14     port = models.IntegerField()
15     b = models.ForeignKey(to="Business",to_field='id')
16 
17 models.py

models.py

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        .hide {
            display: none;
        }

        .shade {
            position: fixed;
            top: 0;
            right: 0;
            left: 0;
            bottom: 0;
            background: black;
            opacity: 0.6;
            z-index: 100;
        }

        .add-modal, .edit-modal, .delete-modal {
            position: fixed;
            height: 300px;
            width: 400px;
            top: 100px;
            left: 50%;
            z-index: 101;
            border: 1px solid red;
            background: white;
            margin-left: -200px;
        }
    </style>
</head>
<body>
<h1>主機列表(對象)</h1>
<div>
    <input id="add_host" type="button" value="添加"/>
</div>
<table border="1">
    <thead>
    <tr>
        <th>序號</th>
        <th>主機名</th>
        <th>IP</th>
        <th>端口</th>
        <th>業務線名稱</th>
        <th>操做</th>
    </tr>
    </thead>
    <tbody>

    {% for row in v1 %}
        <tr hid="{{ row.nid }}" bid="{{ row.b_id }}">
            <td>{{ forloop.counter }}</td>
            <td>{{ row.hostname }}</td>
            <td>{{ row.ip }}</td>
            <td>{{ row.port }}</td>
            <td>{{ row.b.caption }}</td>
            <td>
                <a class="edit">編輯</a>|<a class="delete">刪除</a>
            </td>
        </tr>
    {% endfor %}


    </tbody>
</table>

<h1>主機列表(字典)</h1>
<table border="1">
    <thead>
    <tr>
        <th>主機名</th>
        <th>業務線名稱</th>
    </tr>
    </thead>
    <tbody>
    {% for row in v2 %}
        <tr hid="{{ row.nid }}" bid="{{ row.b_id }}">
            <td>{{ row.hostname }}</td>
            <td>{{ row.b__caption }}</td>
        </tr>
    {% endfor %}

    </tbody>
</table>
<h1>主機列表(元組)</h1>
<table border="1">
    <thead>
    <tr>
        <th>主機名</th>
        <th>業務線名稱</th>
    </tr>
    </thead>
    <tbody>
    {% for row in v3 %}
        <tr hid="{{ row.0 }}" bid="{{ row.2 }}">
            <td>{{ row.1 }}</td>
            <td>{{ row.3 }}</td>
        </tr>
    {% endfor %}

    </tbody>
</table>

<div class="shade hide"></div>
<div class="add-modal hide">
    <form id="add_form" method="POST" action="/host">
        <div class="group">
            <input id="host" type="text" placeholder="主機名" name="hostname"/>
        </div>

        <div class="group">
            <input id="ip" type="text" placeholder="IP" name="ip"/>
        </div>

        <div class="group">
            <input id="port" type="text" placeholder="端口" name="port"/>
        </div>

        <div class="group">
            <select id="sel" name="b_id">
                {% for op in b_list %}
                    <option value="{{ op.id }}">{{ op.caption }}</option>
                {% endfor %}
            </select>
        </div>

        <input type="submit" value="提交"/>
        <a id="ajax_submit">悄悄提交</a>
        <input id="cancel" type="button" value="取消"/>
        <span id="erro_msg" style="color: red"></span>
    </form>
</div>

<div class="edit-modal hide">
    <form id="edit_form" method="POST" action="/host">
        <input type="text" name="nid" style="display:none"/>
        <input type="text" placeholder="主機名" name="hostname"/>
        <input type="text" placeholder="IP" name="ip"/>
        <input type="text" placeholder="端口" name="port"/>
        <select name="b_id">
            {% for op in b_list %}
                <option value="{{ op.id }}">{{ op.caption }}</option>
            {% endfor %}
        </select>
        <a id="ajax_submit_edit">確認編輯</a>
        <input id="ajax_submit_cancel" type="button" value="取消"/>
    </form>
</div>
<div class="delete-modal hide">
    <form id="delete_form" method="POST" action="/host">
        <input type="text" name="nid" style="display:none"/>
        <input type="text" placeholder="主機名" name="hostname"/>
        <input type="text" placeholder="IP" name="ip"/>
        <input type="text" placeholder="端口" name="port"/>
        <select name="b_id">
            {% for op in b_list %}
                <option value="{{ op.id }}">{{ op.caption }}</option>
            {% endfor %}
        </select>
        <a id="submit_delete">確認刪除</a>
        <input id="submit_cancle" type="button" value="取消"/>
    </form>


</div>

<script src="/static/jquery-1.12.4.js"></script>
<script>
    $(function () {

        $('#add_host').click(function () {
            $('.shade,.add-modal').removeClass('hide');
        });


        $('#cancel').click(function () {
            $('.shade,.add-modal').addClass('hide');
        });

        $('#ajax_submit').click(function () {
            $.ajax({
                url: "/test_ajax",
                type: 'POST',
                //data: {'hostname': $('#host').val(), 'ip': $('#ip').val(), 'port': $('#port').val(), 'b_id': $('#sel').val()},
                data: $('#add_form').serialize(),
                success: function (data) {
                    var obj = JSON.parse(data);
                    if (obj.status) {
                        location.reload();
                    } else {
                        $('#erro_msg').text(obj.error);
                    }
                }
            })
        });

        $('.edit').click(function () {
            $('.shade,.edit-modal').removeClass('hide');

            var bid = $(this).parent().parent().attr('bid');
            var nid = $(this).parent().parent().attr('hid');

            $('#edit_form').find('select').val(bid);
            $('#edit_form').find('input[name="nid"]').val(nid);
            // 修改
            /*
             $.ajax({
             data: $('#edit_form').serialize()
             });
             */
            // modeletes.Host.objects.filter(nid=nid).update()
        });
        $('#ajax_submit_cancel').click(function () {
            $('.shade,.edit-modal').addClass('hide');
        });


        $('.delete').click(function () {
            $('.shade,.delete-modal').removeClass('hide');

            var bid = $(this).parent().parent().attr('bid');
            var nid = $(this).parent().parent().attr('hid');

            $('#delete_form').find('select').val(bid);
            $('#delete_form').find('input[name="nid"]').val(nid);
        });
        $('#submit_cancle').click(function () {
            $('.shade,.delete-modal').addClass('hide');
        });

    })
</script>

</body>
</html>

host.html

host.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <h1>業務線列表(對象)</h1>
    <ul>
        {% for row in v1 %}
            <li>{{ row.id }} - {{ row.caption }} - {{ row.code }}</li>
        {% endfor %}
    </ul>
    <h1>業務線列表（字典）</h1>
    <ul>
        {% for row in v2 %}
            <li>{{ row.id }} - {{ row.caption }}- {{ row.code }}</li>
        {% endfor %}
    </ul>
    <h1>業務線列表（元組）</h1>
    <ul>
        {% for row in v3 %}
            <li>{{ row.0 }} - {{ row.1 }}- {{ row.2 }}</li>
        {% endfor %}
    </ul>
</body>
</html>

business.html

business

 1 """s14day20 URL Configuration
 2 
 3 The `urlpatterns` list routes URLs to views. For more information please see:
 4     https://docs.djangoproject.com/en/1.10/topics/http/urls/
 5 Examples:
 6 Function views
 7     1. Add an import:  from my_app import views
 8     2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
 9 Class-based views
10     1. Add an import:  from other_app.views import Home
11     2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
12 Including another URLconf
13     1. Import the include() function: from django.conf.urls import url, include
14     2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
15 """
16 from django.conf.urls import url
17 from django.contrib import admin
18 from app01 import views
19 urlpatterns = [
20     url(r'^admin/', admin.site.urls),
21     url(r'^business$', views.business),
22     url(r'^host$', views.host),
23     url(r'^test_ajax$', views.test_ajax),
24     url(r'^app$', views.app),
25     url(r'^ajax_add_app$', views.ajax_add_app),
26     # url(r'^business_add', views.business),
27 ]
28 
29 url.py

url.py

七、一對多塊表操做的的三種方式( views.py )

def host(request):

v1 = models.Host.objects.filter(nid__gt=0)

# QuerySet [hostobj(ip.host,另一個對象(..)),]

# for row in v1:

# print(row.nid,row.hostname,row.ip,row.port,row.b_id,row.b.caption,row.b.code,row.b.id,sep='\t') -->sep間隔符顯示

# print(row.b.fk.name)

# return HttpResponse("Host")

v2 = models.Host.objects.filter(nid__gt=0).values('nid','hostname','b_id',' b__caption')

特別注意：這裏跨表操做只能用__(雙下劃線)

# QuerySet: [ {} ]

# print(v2)

# for row in v2:

# print(row['nid'],row['hostname'],row['b_id'],row['b__caption'])

v3 = models.Host.objects.filter(nid__gt=0).values_list('nid','hostname','b_id','b__caption')

# QuerySet: [ {} ]

# print(v2)

return render(request, 'host.html', {'v1': v1,'v2': v2,'v3': v3})

八、外鍵：html

v = models.Host.objects.filter(nid__gt=0)

v[0].b.caption ----> 經過.進行跨表

外鍵：

class UserType(models.Model):

caption = models.CharField(max_length=32)

id caption

# 1，普通用戶

# 2，VIP用戶

# 3，遊客

class User(models.Model):

age = models.IntergerFiled()

name = models.CharField(max_length=10)#字符長度

# user_type_id = models.IntergerFiled() # 約束，

user_type = models.ForeignKey("UserType",to_field='id') # 約束，

name age user_type_id

# 張揚 18 3

# 張A揚 18 2

# 張B揚 18 2

九、 Ajax

AJAX = Asynchronous JavaScript and XML（異步的 JavaScript 和 XML）。

不是新的編程語言，而是一種使用現有標準的新方法。

最大的優勢是在不從新加載整個頁面的狀況下，能夠與服務器交換數據並更新部分網頁內容。

不須要任何瀏覽器插件，但須要用戶容許JavaScript在瀏覽器上執行。

工做原理

經常使用的參數：

var configObj = {

method //數據的提交方式：get和post

url //數據的提交路徑

async //是否支持異步刷新，默認是true

data //須要提交的數據

dataType //服務器返回數據的類型，例如xml,String,Json等

success //請求成功後的回調函數

error //請求失敗後的回調函數

}

實例：

$.ajax({

url: '/host',

type: "POST",

data: {'k1': 123,'k2': "root"},

success: function(data){

// data是服務器端返回的字符串

var obj = JSON.parse(data);

}

})

建議：永遠讓服務器端返回一個字典

return HttpResponse(json.dumps(字典))

十、多對多：

建立多對多：

方式一：自定義關係表

class Host(models.Model):

nid = models.AutoField(primary_key=True)

hostname = models.CharField(max_length=32,db_index=True)

ip = models.GenericIPAddressField(protocol="ipv4",db_index=True)

port = models.IntegerField()

b = models.ForeignKey(to="Business", to_field='id')

# 10

class Application(models.Model):

name = models.CharField(max_length=32)

# 2

class HostToApp(models.Model):

hobj = models.ForeignKey(to='Host',to_field='nid')

aobj = models.ForeignKey(to='Application',to_field='id')

# HostToApp.objects.create(hobj_id=1,aobj_id=2)

方式二：自動建立關係表

class Host(models.Model):

nid = models.AutoField(primary_key=True)

hostname = models.CharField(max_length=32,db_index=True)

ip = models.GenericIPAddressField(protocol="ipv4",db_index=True)

port = models.IntegerField()

b = models.ForeignKey(to="Business", to_field='id')

# 10

class Application(models.Model):

name = models.CharField(max_length=32)

r = models.ManyToManyField("Host")

沒法直接對第三張表進行操做

obj = Application.objects.get(id=1)

obj.name

# 第三張表操做

obj.r.add(1)

obj.r.add(2)

obj.r.add(2,3,4)

obj.r.add(*[1,2,3,4])

obj.r.remove(1)

obj.r.remove(2,4)

obj.r.remove(*[1,2,3])

obj.r.clear()

obj.r.set([3,5,7])

# 全部相關的主機對象「列表」 QuerySet

obj.r.all()

 1 """s14day20 URL Configuration
 2 
 3 The `urlpatterns` list routes URLs to views. For more information please see:
 4     https://docs.djangoproject.com/en/1.10/topics/http/urls/
 5 Examples:
 6 Function views
 7     1. Add an import:  from my_app import views
 8     2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
 9 Class-based views
10     1. Add an import:  from other_app.views import Home
11     2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
12 Including another URLconf
13     1. Import the include() function: from django.conf.urls import url, include
14     2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
15 """
16 from django.conf.urls import url
17 from django.contrib import admin
18 from app01 import views
19 urlpatterns = [
20     url(r'^admin/', admin.site.urls),
21     url(r'^business$', views.business),
22     url(r'^host$', views.host),
23     url(r'^test_ajax$', views.test_ajax),
24     url(r'^app$', views.app),
25     url(r'^ajax_add_app$', views.ajax_add_app),
26     # url(r'^business_add', views.business),
27 ]
28 
29 url.py

url.py

  1 <!DOCTYPE html>
  2 <html lang="en">
  3 <head>
  4     <meta charset="UTF-8">
  5     <title></title>
  6     <style>
  7         .host-tag{
  8             display: inline-block;
  9             padding: 3px;
 10             border: 1px solid red;
 11             background-color: palevioletred;
 12         }
 13         .hide{
 14             display: none;
 15         }
 16         .shade{
 17             position: fixed;
 18             top: 0;
 19             right: 0;
 20             left: 0;
 21             bottom: 0;
 22             background: black;
 23             opacity: 0.6;
 24             z-index: 100;
 25         }
 26         .add-modal,.edit-modal{
 27             position: fixed;
 28             height: 300px;
 29             width: 400px;
 30             top:100px;
 31             left: 50%;
 32             z-index: 101;
 33             border: 1px solid red;
 34             background: white;
 35             margin-left: -200px;
 36         }
 37     </style>
 38 </head>
 39 <body>
 40 
 41     <h1>應用列表</h1>
 42      <div>
 43         <input id="add_app" type="button" value="添加" />
 44     </div>
 45     <table border="1">
 46         <thead>
 47             <tr>
 48                 <td>應用名稱</td>
 49                 <td>應用主機列表</td>
 50             </tr>
 51         </thead>
 52         <tbody>
 53             {% for app in app_list %}
 54                 <tr aid="{{ app.id }}">
 55                     <td>{{ app.name }}</td>
 56                     <td>
 57                         {% for host in app.r.all %}
 58                             <span class="host-tag" hid="{{ host.nid }}"> {{ host.hostname }} </span>
 59                         {% endfor %}
 60                     </td>
 61                     <td>
 62                         <a class="edit">編輯</a>
 63                     </td>
 64                 </tr>
 65             {% endfor %}
 66         </tbody>
 67     </table>
 68 
 69 
 70 
 71     <div class="shade hide"></div>
 72     <div class="add-modal hide">
 73         <form id="add_form" method="POST" action="/app">
 74             <div class="group">
 75                 <input id="app_name" type="text" placeholder="應用名稱" name="app_name" />
 76             </div>
 77             <div class="group">
 78                 <select id="host_list" name="host_list" multiple>
 79                     {% for op in host_list %}
 80                         <option value="{{ op.nid }}">{{ op.hostname }}</option>
 81                     {% endfor %}
 82                 </select>
 83             </div>
 84 
 85             <input type="submit" value="提交" />
 86             <input id="add_submit_ajax" type="button" value="Ajax提交" />
 87         </form>
 88 
 89 
 90     </div>
 91 
 92     <div class="edit-modal hide">
 93         <form id="edit_form" method="POST" action="/host">
 94                 <input type="text" name="nid" style="display:none" />
 95                 <input type="text" placeholder="應用名稱" name="app" />
 96                 <select name="host_list" multiple>
 97                     {% for op in host_list %}
 98                         <option value="{{ op.nid }}">{{ op.hostname }}</option>
 99                     {% endfor %}
100                 </select>
101             <a id="ajax_submit_edit" >確認編輯</a>
102         </form>
103 
104 
105     </div>
106 
107      <script src="/static/jquery-1.12.4.js"></script>
108     <script>
109         $(function(){
110 
111             $('#add_app').click(function(){
112                 $('.shade,.add-modal').removeClass('hide');
113             });
114 
115             $('#cancel').click(function(){
116                 $('.shade,.add-modal').addClass('hide');
117             });
118 
119 
120             $('#add_submit_ajax').click(function(){
121                 $.ajax({
122                     url: '/ajax_add_app',
123                     // data: {'user': 123,'host_list': [1,2,3,4]},
124                     data: $('#add_form').serialize(),
125                     type: "POST",
126                     dataType: 'JSON', // 內部
127                     traditional: true,
128                     success: function(obj){
129                         console.log(obj);
130                     },
131                     error: function () {
132 
133                     }
134 
135                 })
136             });
137 
138 
139             $('.edit').click(function(){
140 
141                 $('.edit-modal,.shade').removeClass('hide');
142 
143                 var hid_list = [];
144                 $(this).parent().prev().children().each(function(){
145                     var hid = $(this).attr('hid');
146                     hid_list.push(hid)
147                 });
148 
149                 $('#edit_form').find('select').val(hid_list);
150                 // 若是發送到後臺
151                 //
152                 /*
153                 obj = models.Application.objects.get(id=ai)
154                 obj.name = "新Name"
155                 obj.save()
156                 obj.r.set([1,2,3,4])
157                 */
158 
159 
160             })
161 
162         })
163 
164 
165 
166     </script>
167 </body>
168 </html>
169 
170 app.html

app.html

  1 from django.shortcuts import render,HttpResponse,redirect
  2 from app01 import models
  3 import json
  4 # Create your views here.
  5 
  6 def business(request):
  7     v1 = models.Business.objects.all()
  8     # QuerySet
  9     # [obj(id,caption,code),obj(id,caption,code),obj(id,caption,code) ]
 10 
 11     v2 = models.Business.objects.all().values('id','caption')
 12     # QuerySet
 13     # [{'id':1,'caption': '��ά��'},{'id':1,'caption': '��ά��'},...]
 14 
 15     v3 = models.Business.objects.all().values_list('id','caption')
 16     # QuerySet
 17     # [(1����ά��),(2,����)]
 18     return render(request, 'business.html', {'v1': v1,'v2': v2, 'v3': v3})
 19 
 20 # def host(request):
 21 #     v1 = models.Host.objects.filter(nid__gt=0)
 22 #     # QuerySet [hostobj(ip.host,����һ������(..)),]
 23 #     # for row in v1:
 24 #     #     print(row.nid,row.hostname,row.ip,row.port,row.b_id,row.b.caption,row.b.code,row.b.id,sep='\t')
 25 #     #     print(row.b.fk.name)
 26 #     # return HttpResponse("Host")
 27 #     v2 = models.Host.objects.filter(nid__gt=0).values('nid','hostname','b_id','b__caption')
 28 #     # QuerySet: [ {} ]
 29 #     # print(v2)
 30 #     # for row in v2:
 31 #     #     print(row['nid'],row['hostname'],row['b_id'],row['b__caption'])
 32 #
 33 #     v3 = models.Host.objects.filter(nid__gt=0).values_list('nid','hostname','b_id','b__caption')
 34 #     # QuerySet: [ {} ]
 35 #     # print(v2)
 36 #     return render(request, 'host.html', {'v1': v1,'v2': v2,'v3': v3})
 37 
 38 def host(request):
 39     if request.method == "GET":
 40         v1 = models.Host.objects.filter(nid__gt=0)
 41         v2 = models.Host.objects.filter(nid__gt=0).values('nid','hostname','b_id','b__caption')
 42         v3 = models.Host.objects.filter(nid__gt=0).values_list('nid','hostname','b_id','b__caption')
 43 
 44         b_list = models.Business.objects.all()
 45 
 46         return render(request, 'host.html', {'v1': v1,'v2': v2,'v3': v3,'b_list':b_list})
 47 
 48     elif request.method == "POST":
 49 
 50         h = request.POST.get('hostname')
 51         i = request.POST.get('ip')
 52         p = request.POST.get('port')
 53         b = request.POST.get('b_id')
 54         # models.Host.objects.create(hostname=h,
 55         #                            ip=i,
 56         #                            port=p,
 57         #                            b=models.Business.objects.get(id=b)
 58         #                            )
 59         models.Host.objects.create(hostname=h,
 60                                    ip=i,
 61                                    port=p,
 62                                    b_id=b
 63                                    )
 64         return redirect('/host')
 65 
 66 
 67 def test_ajax(request):
 68 
 69     ret = {'status': True, 'error': None, 'data': None}
 70     try:
 71         h = request.POST.get('hostname')
 72         i = request.POST.get('ip')
 73         p = request.POST.get('port')
 74         b = request.POST.get('b_id')
 75         if h and len(h) > 5:
 76             models.Host.objects.create(hostname=h,
 77                                            ip=i,
 78                                            port=p,
 79                                            b_id=b)
 80         else:
 81             ret['status'] = False
 82             ret['error'] = "過短了"
 83     except Exception as e:
 84         ret['status'] = False
 85         ret['error'] = '請求錯誤'
 86     return HttpResponse(json.dumps(ret))
 87 
 88 
 89 def app(request):
 90     if request.method == "GET":
 91         app_list = models.Application.objects.all()
 92         # for row in app_list:
 93         #     print(row.name,row.r.all())
 94 
 95         host_list = models.Host.objects.all()
 96         return render(request,'app.html',{"app_list": app_list,'host_list': host_list})
 97     elif request.method == "POST":
 98         app_name = request.POST.get('app_name')
 99         host_list = request.POST.getlist('host_list')
100         print(app_name,host_list)
101 
102         obj = models.Application.objects.create(name=app_name)
103         obj.r.add(*host_list)
104 
105         return redirect('/app')
106 
107 
108 def ajax_add_app(request):
109     ret = {'status':True, 'error':None, 'data': None}
110 
111     app_name = request.POST.get('app_name')
112     host_list = request.POST.getlist('host_list')
113     obj = models.Application.objects.create(name=app_name)
114     obj.r.add(*host_list)
115     return HttpResponse(json.dumps(ret))
116 
117 views.py