Django之入门 CMDB系统 (四) 增删改查
前言
作者: 何全，github地址: https://github.com/hequan2017 QQ交流群: 620176501
创新互联公司专业为企业提供坊子网站建设、坊子做网站、坊子网站设计、坊子网站制作等企业网站建设、网页设计与制作、坊子企业网站模板建站服务，10多年坊子做网站经验，不只是建网站，更提供有价值的思路和整体网络服务。
通过此教程完成从零入门，能够独立编写一个简单的CMDB系统。
目前主流的方法开发方式，分为2种：mvc 和 mvvc方式。本教程为 mvc 方式，即 django负责渲染html。后面会推出 mvvc(前后端分离)的入门教程。
教程项目地址: https://github.com/hequan2017/husky/
教程文档地址: https://github.com/hequan2017/husky/tree/master/doc
说明
- cbv 在视图里使用类处理请求 (下面采用这种方式，比较会抽象一点，但是会比较简洁)
- fbv 在视图里使用函数处理请求
基础设置
pycharm : 菜单栏 tools --> 选择 run manage.py task
manage.py@husky > startapp asset ##创建 asset app
具体内容请看实际页面，下面只是把重点代码 进行展示。
import sys
INSTALLED_APPS = [
"asset",
]
from django.db import models
class Ecs(models.Model):
TYPE_CHOICES = (
('阿里云', '阿里云'),
('腾讯云', '腾讯云'),
('华为云', '华为云'),
('亚马逊', '亚马逊'),
('其他', '其他'),
(None,None),
)
hostname = models.CharField(max_length=96, verbose_name='主机名', blank=True, null=True, )
type = models.CharField(choices=TYPE_CHOICES, max_length=16, verbose_name='主机类型', blank=True, null=True, )
instance_id = models.CharField(max_length=64, verbose_name='实例ID', unique=True)
instance_name = models.CharField(max_length=96, verbose_name='标签', blank=True, null=True, )
os_name = models.CharField(max_length=64, verbose_name='系统版本', blank=True, null=True, )
cpu = models.IntegerField(verbose_name='CPU', blank=True, null=True)
memory = models.IntegerField(verbose_name='内存', blank=True, null=True)
private_ip = models.GenericIPAddressField(verbose_name='内网IP', blank=True, null=True)
public_ip = models.GenericIPAddressField(verbose_name='外网IP', blank=True, null=True)
c_time = models.DateTimeField(auto_now_add=True, null=True, verbose_name='创建时间', blank=True)
u_time = models.DateTimeField(auto_now=True, null=True, verbose_name='更新时间', blank=True)
class Meta:
db_table = "ecs"
verbose_name = "主机"
verbose_name_plural = verbose_name
def __str__(self):
return self.hostname
pycharm : 菜单栏 tools --> 选择 run manage.py task
makemigrations 生成数据文件
migrate 根据文件，执行生成表结构
from django import forms
from asset.models import Ecs
class EcsForm(forms.ModelForm):
class Meta:
model = Ecs
fields = '__all__'
widgets = {
'type': forms.Select(
attrs={'class': 'select2',
'data-placeholder': '----请选择环境----'}),
}
help_texts = {
'type': '* 请选择 资产所在平台.',
}
def clean_type(self):
"""
自定义验证
:return:
"""
type = self.cleaned_data['type']
return type
from django.contrib import admin
from asset.models import Ecs
admin.site.register(Ecs)
- 自定义标签处理
- asset/templatetags/asset_filter.py
from django import template
from django.apps import apps
from asset.models import Ecs
register = template.Library()
@register.filter(name='ecs_model_choices')
def ecs_model_choices(model_name, choice_name):
asset_app = apps.get_app_config('assets')
return getattr(asset_app.get_model(model_name), choice_name)
@register.filter(name='ecs_type_choices')
def ecs_type_choices(value):
return Ecs.TYPE_CHOICES
增加
class EcsCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView):
"""
Ecs 创建
"""
permission_required = ('asset.add_ecs',)
model = Ecs
form_class = EcsForm
template_name = 'asset/ecs-create.html'
success_url = reverse_lazy('asset:ecs-list')
def get_context_data(self, **kwargs):
context = {}
if '__next__' in self.request.POST: # 为了获取 点击本页之前的 浏览网页
context['i__next__'] = self.request.POST['__next__']
else:
try:
context['i__next__'] = self.request.META['HTTP_REFERER']
except Exception as e:
logger.error(e)
kwargs.update(context)
return super().get_context_data(**kwargs)
def get_success_url(self):
return self.request.POST['__next__']
def form_valid(self, form): # 保存结果 可以进行 手动 修改 再保存
obj = form.save(commit=False)
obj.save()
return super().form_valid(form)
def form_invalid(self, form):
print(form.errors)
"""If the form is invalid, render the invalid form."""
return self.render_to_response(self.get_context_data(form=form))
from django.urls import path
from asset import views
app_name = "asset"
urlpatterns = [
path('ecs-create', views.EcsCreateView.as_view(), name='ecs-create')
]
{% if perms.asset.add_ecs %} 权限判断
-
添加资产 ## 页面跳转
{% endif %}
{% if perms.asset.view_ecs %}
-
资产列表
{% endif %}
- templates/asset/ecs-create.html
{% block footer-js %}
{% endblock %}
列表
def get_list(function):
"""
列表页面 获取 搜索
:param function: self.model
:return:
"""
@wraps(function)
def wrapped(self):
# user = self.request.user
# groups = [x['name'] for x in self.request.user.groups.values()]
# request_type = self.request.method
# model = str(self.model._meta).split(".")[1]
filter_dict = {}
not_list = ['page', 'order_by', 'csrfmiddlewaretoken']
for k, v in dict(self.request.GET).items():
if [i for i in v if i != ''] and (k not in not_list):
if '__in' in k:
filter_dict[k] = v
else:
filter_dict[k] = v[0]
self.filter_dict = filter_dict
self.queryset = self.model.objects.filter(**filter_dict).order_by('-id')
order_by_val = self.request.GET.get('order_by', '')
if order_by_val:
self.queryset = self.queryset.order_by(order_by_val) if self.queryset else self.queryset
result = function(self)
return result
return wrapped
class EcsListView(LoginRequiredMixin, PermissionRequiredMixin, ListView):
permission_required = ('asset.view_ecs',)
template_name = 'asset/ecs-list.html'
model = Ecs
queryset = Ecs.objects.get_queryset().order_by('-id')
@get_list ## 处理查询
def get_context_data(self, **kwargs):
try:
page = self.request.GET.get('page', 1)
except PageNotAnInteger as e:
page = 1
p = Paginator(self.queryset, getattr(settings, 'DISPLAY_PER_PAGE'), request=self.request)
ecs_list = p.page(page)
context = {
"ecs_list": ecs_list,
"filter_dict": self.filter_dict # 把查询条件返回给前端
}
kwargs.update(context)
return super().get_context_data(**kwargs)
path('ecs-list', views.EcsListView.as_view(), name='ecs-list'),
- templates.py/asset/ecs-list.html
{% block footer-js %}
更新
class EcsUpdateView(LoginRequiredMixin, PermissionRequiredMixin, UpdateView):
permission_required = ('asset.change_ecs',)
model = Ecs
form_class = EcsForm
template_name = 'asset/ecs-create.html'
success_url = reverse_lazy('asset:ecs-list')
def get_context_data(self, **kwargs):
context = {}
if '__next__' in self.request.POST: # 为了获取 点击本页之前的 浏览网页
context['i__next__'] = self.request.POST['__next__']
else:
try:
context['i__next__'] = self.request.META['HTTP_REFERER']
except Exception as e:
logger.error(e)
kwargs.update(context)
return super().get_context_data(**kwargs)
def get_success_url(self):
return self.request.POST['__next__']
path('ecs-update-', views.EcsUpdateView.as_view(), name='ecs-update'),
- templates.py/asset/ecs-create.html 创建页面 同时也当更新页面
{% if perms.asset.change_ecs %}
编辑
{% endif %}
删除
class EcsDeleteView(LoginRequiredMixin, PermissionRequiredMixin, View):
permission_required = ('asset.delete_ecs',)
model = Ecs
def post(self, request):
ret = {'status': True, 'error': None, }
nid = self.request.POST.get('nid', None)
self.model.objects.get(id=nid).delete()
return HttpResponse(json.dumps(ret))
path('ecs-delete', views.EcsDeleteView.as_view(), name='ecs-delete'),
templates.py/asset/ecs-list.html
{% if perms.asset.delete_ecs %}
删除
{% endif %}
$(function () {
$(document).on('click', '.ecs-delete', function () {
var id = $(this).parent().parent().attr('id');
var name = $(this).parent().parent().attr('name');
swal({
title: "你确定删除",
text: name,
type: "warning",
showCancelButton: true,
confirmButtonColor: "#DD6B55",
confirmButtonText: "确定",
cancelButtonText: "取消",
closeOnConfirm: false
}, function () {
$.ajax({
url: "{% url 'asset:ecs-delete' %}",
type: 'POST',
data: {'nid': id},
success: function (data) {
var obj = JSON.parse(data);
if (obj.status) {
swal({title: "删除", text: "已成功删除", type: "success"}, function () {
window.location.reload();
})
} else {
swal("错误", "删除" + "[ " + obj.error + " ]" + "遇到错误", "error");
}
}
});
});
});
});
详情
class EcsDetailView(LoginRequiredMixin, PermissionRequiredMixin, DetailView):
permission_required = ('asset.view_ecs',)
model = Ecs
form_class = EcsForm
template_name = 'asset/ecs-detail.html'
def get_context_data(self, **kwargs):
pk = self.kwargs.get(self.pk_url_kwarg, None)
context = {
"ecs": self.model.objects.get(id=pk),
"nid": pk
}
kwargs.update(context)
return super().get_context_data(**kwargs)
path('ecs-detail-', views.EcsDetailView.as_view(), name='ecs-detail'),
- templates.py/asset/ecs-list.html
| 主机类型: |
{{ ecs.get_type_display }}
|
| 实例ID: |
{{ ecs.instance_id }}
|
| 标签: |
{{ ecs.instance_name }}
|
| 系统版本: |
{{ ecs.os_name }}
|
| CPU: |
{{ ecs.cpu }}
|
| 内存: |
{{ ecs.memory }}
|
| 内网IP: |
{{ ecs.private_ip }}
|
| 外网IP: |
{{ ecs.public_ip }}
|
| 创建时间: |
{{ ecs.c_time }}
|
| 更新时间: |
{{ ecs.u_time }}
|
文章名称：Django之入门CMDB系统(四)增删改查
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