2019-01-16

CMDB增删改查（基于form表单）

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):
    '''主机,阿里云eth0 内网网卡， eth1 公网网卡'''
    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')
    lab= models.ForeignKey(to='Lable',blank=True, null=True, verbose_name='标签')
    mem= models.CharField(max_length=8,blank=True, null=True, verbose_name='内存/M')
    # mem= models.ForeignKey(to='Memory',blank=True, null=True, verbose_name='内存/M')
    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')
    eth1_network= models.CharField(max_length=32, blank=True, null=True, verbose_name='公网IP')
    eth0_network= models.CharField(max_length=32,verbose_name='私网IP')
    sn= models.CharField(max_length=64, blank=True, null=True, verbose_name='sn')
    os= models.ForeignKey(to='Os', blank=True, null=True, verbose_name='操作系统') #os+版本号
    kernel= models.CharField(max_length=64, blank=True, null=True, verbose_name='系统内核') #内核+版本号
    the_upper=models.ForeignKey(to='Host',blank=True,null=True,verbose_name='宿主机',related_name='upper')
    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')
    remarks = models.CharField(max_length=2048, blank=True, null=True, verbose_name='备注')
    createtime = models.CharField(max_length=32, blank=True, null=True, verbose_name='创建时间')
    expirytime = models.CharField(max_length=32, blank=True, null=True, verbose_name='到期时间')
    vpcnet = models.ForeignKey(to='VpcNet', blank=True, null=True, verbose_name='VPC网络',related_name='vpcnet')
    vpcsw = models.ForeignKey(to='VpcSwitch', blank=True, null=True, verbose_name='VPC交换机')
    vpccon = models.ForeignKey(to='VpcNet', blank=True, null=True, verbose_name='VPC连接',related_name='vpccon')
    state_choices=(
        (1,'Running'),
        (2,'下线'),
        (3,'关机'),
        (4,'删除'),
    )
    state = models.SmallIntegerField(verbose_name='主机状态', choices=state_choices,blank=True,null=True,)
    def __str__(self):
        return self.eth0_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:

    
    



    添加


    
            {% for host in host_list %}
                
            {% endfor %}
        

        

            

                
 
                
主机名
                
CPU
                
内存/G
                
带宽/M
                
IP
                
来源类型
                
所属区域
                
状态
                
编辑
                
删除
            
        
        

                    
{{ host.id }}
                    
{{ host.hostname }}
                    
{{ host.cpu }}
                    
{{ host.mem }}
                    
{{ host.speed }}
                    
{{ host.eth0_network }}
                    
{{ host.source.name }}
                    
{{ host.region.name }}
                    
{{ host.get_state_display }}
                    
编辑
                    
删除
                
    

• add.html:

    
    



    {% csrf_token %}
    
主机名：{{ form.hostname }} {{form.errors.hostname.0 }}
    
cpu：{{ form.cpu }} {{ form.errors.cpu.0 }}
    
内存：{{ form.mem }} {{ form.errors.mem.0 }}
    
带宽：{{ form.speed }} {{ form.errors.speed.0 }}
    
网卡ip：{{ form.eth0_network }} {{ form.errors.eth0_network }}
    
来源：{{ form.source_id }}
    
区域：{{ form.region_id }}
    

• edit.html:

    
    



    {% csrf_token %}
    
主机名：{{ form.hostname }} {{form.errors.hostname.0 }}
    
cpu：{{ form.cpu }} {{ form.errors.cpu.0 }}
    
内存：{{ form.mem }} {{ form.errors.mem.0 }}
    
带宽：{{ form.speed }} {{ form.errors.speed.0 }}
    
网卡ip：{{ form.eth0_network }} {{ form.errors.eth0_network }}
    
来源：{{ form.source_id }}
    
区域：{{ form.region_id }}