十六、cmdb的增删改查

初步实现cmdb增删改查功能，先实现功能后面补充样式。

1、设计表，在models中定义好字段;

models.py

class Disk(models.Model):
    '''磁盘'''
    path = models.CharField(max_length=64, blank=True, null=True, verbose_name='挂载路径')
    size = models.CharField(max_length=16, blank=True, null=True, verbose_name='磁盘大小/G')
    remarks = models.CharField(max_length=2048, blank=True, null=True, verbose_name='备注')
    def __str__(self):
        return self.size
    class Meta:
        verbose_name_plural = "磁盘表"

class Region(models.Model):
    name = models.CharField(max_length=64,blank=True,null=True,verbose_name='区域')
    def __str__(self):
        return self.name
    class Meta:
        verbose_name_plural = "区域表"

class Host(models.Model):
    hostname = models.CharField(max_length=64, blank=True, null=True, verbose_name='阿里云主机名')
    ecsname = models.CharField(max_length=64, blank=True, null=True, verbose_name='阿里云实例ID')
    logining = models.ManyToManyField(to='Login', blank=True, null=True, verbose_name='授权用户')
    login_port = models.CharField(max_length=16, default='22', blank=True, null=True, verbose_name='ssh登录端口')
    cpu = models.CharField(max_length=8, blank=True, null=True, verbose_name='CPU')
    mem = models.CharField(max_length=8, blank=True, null=True, verbose_name='内存/G')
    speed = models.CharField(max_length=8, blank=True, default='5', null=True, verbose_name='带宽/M')
    disks = models.ManyToManyField(to='Disk', blank=True, null=True, verbose_name='磁盘')
    network = models.CharField(max_length=32, blank=True, null=True, verbose_name='IP')
    sn = models.CharField(max_length=64, blank=True, null=True, verbose_name='sn')
    kernel = models.CharField(max_length=64, blank=True, null=True, verbose_name='系统内核')  # 内核+版本号
    source = models.ForeignKey(to='Source', blank=True, null=True, verbose_name='来源类型')
    region = models.ForeignKey(to='Region', blank=True, null=True, verbose_name='所属区域')
    state_choices = (
        (1, 'Running'),
        (2, '下线'),
        (3, '关机'),
        (4, '删除'),
        (5, '故障'),
    )
    state = models.SmallIntegerField(verbose_name='主机状态', choices=state_choices, blank=True, null=True, )

    def __str__(self):
        return self.network


    class Meta:
        verbose_name_plural = "主机表"



class Login(models.Model):
    '''登录相关'''
    login_name = models.CharField(max_length=16, default='root', verbose_name='登录用户名')
    login_pwd= models.CharField(max_length=64, blank=True, null=True, verbose_name='登录密码')
    auth=models.CharField(max_length=8,blank=True, null=True, verbose_name='具有权限')
    def __str__(self):
        return self.login_name
    class Meta:
        verbose_name_plural = "主机用户表"



class Source(models.Model):
    '''来源：阿里云、物理机（某机房等）'''
    name = models.CharField(max_length=16, blank=True, null=True, verbose_name='来源')
    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = "主机来源表"

初始化表，让其在数据库中创建对应的表：

python manage.py makemigrations  
 python manage.py migrate

2、设计路由，增删改查分别走路径

这里我们让增删改查走一个app，所以使用include引入：

from django.conf.urls import url,include
from django.contrib import admin


urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^api/', include('apiAPP.urls')),
]

新建一个apiAPP,然后新建一个urls.py,我们将其子路由定义在此。

from django.conf.urls import url,include
from django.contrib import admin
from apiAPP import views
'''任何usl都会从这里匹配'''
'''此处是精确匹配，写list.html,浏览器也要写list.html，后面带/的话，浏览器也要带/'''
urlpatterns = [
    url(r'^list$', views.List.as_view()),
    url(r'^update/(\d+)/', views.Update.as_view()),
    url(r'^add$', views.Add.as_view()),
    url(r'^del', views.Del.as_view()),
]

3、利用Form表单来在前端展现数据：

这里我们创建一个跟应用app同级的目录,utils,并且创建
form_class.py：

#!/usr/bin/python
# -*- coding:utf-8 -*-
# @Time   : 2019/1/16 14:33
# @Author : liaochao
# @File   : form_class.py
from django.forms import Form
from django.forms import fields
from django.forms import widgets
from apiAPP import models

class HostForm(Form):
    hostname = fields.CharField(
        required=True,
        #error_messages={'required': '不能为空'},
        widget=widgets.TextInput(attrs={'class': 'form-control'})
    )
    cpu = fields.IntegerField(
        required=True,
        #error_messages={'required': '不能为空'},
        widget=widgets.TextInput(attrs={'class': 'form-control'})
    )
    mem = fields.IntegerField(
        required=True,
        #error_messages={'required': '不能为空'},
        widget=widgets.TextInput(attrs={'class': 'form-control'})
    )
    speed = fields.CharField(
        required=True,
        #error_messages={'required': '不能为空'},
        widget=widgets.TextInput(attrs={'class': 'form-control'})
    )
    eth0_network = fields.CharField(
        required=True,
        #error_messages={'required': '不能为空'},
        widget=widgets.TextInput(attrs={'class': 'form-control'})
    )
    # state = fields.ChoiceField(
    #     required=True,
    #     # values_list('id','name') 会让数据变成[(id,name),(id,name)] 这种格式
    #     choices=[],
    #     #下拉框
    #     widget=widgets.Select(attrs={'class': 'form-control'}),
    # )
    source_id = fields.ChoiceField(
        required=True,
        # values_list('id','name') 会让数据变成[(id,name),(id,name)] 这种格式
        choices=[],
        #下拉框
        widget=widgets.Select(attrs={'class': 'form-control'}),
    )
    region_id = fields.ChoiceField(
        required=True,
        choices=[],
        widget=widgets.Select(attrs={'class': 'form-control'})
    )
    def __init__(self,*args,**kwargs):
        '每次都默认执行初始化，保证在数据库拿到的数据是最新的'
        super(HostForm,self).__init__(*args,**kwargs)
        # values_list('id','name') 会让数据变成[(id,name),(id,name)] 这种格式
        self.fields['source_id'].choices = models.Source.objects.values_list('id','name')
        self.fields['region_id'].choices=models.Region.objects.values_list('id','name')
        # self.fields['state'].choices=models.Host.objects.values_list('id','state')

4、我们在apiAPP里面的viwe.py里面写增删改查逻辑

from django.shortcuts import render,HttpResponse,redirect
from apiAPP import models
from django.views import View
from django.forms import Form
from django.forms import fields
from django.forms import widgets
from utils import form_class
# Create your views here.

class List(View):
    def post(self,request,*args,**kwargs):
        pass
    def get(self,request,*args,**kwargs):
        # return HttpResponse('List')
        host_list=models.Host.objects.all()
        return render(request,'host.html',locals())

class Add(View):
    '''基于form的增加'''
    def post(self,request,*args,**kwargs):
        form =form_class.HostForm(data=request.POST)
        if form.is_valid():
            print(form.cleaned_data)
            models.Host.objects.create(**form.cleaned_data)
            print("正常提交")
            return redirect('/api/list')
        else:
            print(form.errors)
            return render(request,'add.html',locals())
    def get(self,request,*args,**kwargs):
        form = form_class.HostForm()
        return render(request,'add.html',locals())
class Update(View):
    '''基于form的修改'''
    def post(self,request,pk):
        print("post--id-->", pk)
        form = form_class.HostForm(data=request.POST)
        if form.is_valid():
            print(form.cleaned_data)
            models.Host.objects.filter(id=pk).update(**form.cleaned_data)
            return redirect('/api/list')
        else:
            print(form.errors)
            return render(request,'edit.html',locals())
    def get(self,request,pk):
        print ("get--id-->",pk)
        # # 拿到前端传过来的id
        # get_id = request.GET.get('id')
        obj = models.Host.objects.filter(id=pk).first()
        print(obj)
        form = form_class.HostForm(
            initial={
                'hostname':obj.hostname,
                'cpu':obj.cpu,
                'mem':obj.mem,
                'speed':obj.speed,
                'eth0_network':obj.eth0_network,
                'source_id':obj.source_id,
                'region_id':obj.region_id,
                # 'get_state_display ':obj.get_state_display ,
            }
        )
#        return HttpResponse('update')
        return render(request,'edit.html',locals())

class Del(View):
    def post(self,request,*args,**kwargs):
        pass
    def get(self,request,*args,**kwargs):
        get_id = int(request.GET.get('id'))
        models.Host.objects.filter(id=get_id).delete()
        return redirect('/api/list')

5、编写tempates中的html,用于前端展示，

其中我们需要一个list展示的host.html,增加的add.html，编辑的edit.html。
host.html:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>主机列表</title>
</head>
<body>
<div>
    <a href="/api/add">添加</a>
</div>
<div class="container">
    <table class="table table-bordered table-hover" id="table">
        <thead>
            <tr>
                <th> </th>
                <th>主机名</th>
                <th>CPU</th>
                <th>内存/G</th>
                <th>带宽/M</th>
                <th>IP</th>
                <th>来源类型</th>
                <th>所属区域</th>
                <th>状态</th>
                <th>编辑</th>
                <th>删除</th>
            </tr>
        </thead>
        <tbody>
            {% for host in host_list %}
                <tr>
                    <td>{{ host.id }}</td>
                    <td>{{ host.hostname }}</td>
                    <td>{{ host.cpu }}</td>
                    <td>{{ host.mem }}</td>
                    <td>{{ host.speed }}</td>
                    <td>{{ host.eth0_network }}</td>
                    <td>{{ host.source.name }}</td>
                    <td>{{ host.region.name }}</td>
                    <td>{{ host.get_state_display }}</td>
                    <td><a href="/api/update/{{ host.id }}">编辑</a></td>
                    <td><a href="/api/del?id={{ host.id }}">删除</a></td>
                </tr>
            {% endfor %}
        </tbody>
    </table>
</div>
</body>
</html>

add.html:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>主机添加</title>
</head>
<body>
<form class="form-horisontal templatemo-container templatemo-login-form-1 margin-bottom-30" method="post" novalidate role="form">
    {% csrf_token %}
    <p id="hostname">主机名：{{ form.hostname }} {{form.errors.hostname.0 }}</p>
    <p id="cpu">cpu：{{ form.cpu }} {{ form.errors.cpu.0 }}</p>
    <p id="mem">内存：{{ form.mem }} {{ form.errors.mem.0 }}</p>
    <p id="speed">带宽：{{ form.speed }} {{ form.errors.speed.0 }}</p>
    <p id="eth0_network">网卡ip：{{ form.eth0_network }} {{ form.errors.eth0_network }}</p>
    <p id="source.name">来源：{{ form.source_id }}</p>
    <p id="region.name">区域：{{ form.region_id }}</p>
    <input type="submit" value="提交">
</form>
</body>
</html>

edit.html:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数据编辑</title>
</head>
<body>
<form class="form-horisontal templatemo-container templatemo-login-form-1 margin-bottom-30" method="post" novalidate role="form">
    {% csrf_token %}
    <p id="hostname">主机名：{{ form.hostname }} {{form.errors.hostname.0 }}</p>
    <p id="cpu">cpu：{{ form.cpu }} {{ form.errors.cpu.0 }}</p>
    <p id="mem">内存：{{ form.mem }} {{ form.errors.mem.0 }}</p>
    <p id="speed">带宽：{{ form.speed }} {{ form.errors.speed.0 }}</p>
    <p id="eth0_network">网卡ip：{{ form.eth0_network }} {{ form.errors.eth0_network }}</p>
    <p id="source.name">来源：{{ form.source_id }}</p>
    <p id="region.name">区域：{{ form.region_id }}</p>
    <input type="submit" value="提交">

</body>
</html>

6、启动测试增删改查：

访问List页面：
http://127.0.0.1:8000/api/list

点击添加：http://127.0.0.1:8000/api/add

点击修改跟添加类似，只是会默认取到这行数据的id，然后把数据全部填充进去。
点击删除会删除选中数据。