开启事务

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

try:

with transaction.atomic():

self.modelHost. s.create(hostname=\'db3\',

groupid=\'1\',

ip=\'10.0.0.2\',

hostid=\'11256\',

created_by=self.request.user.usernameor \'Admin\')

self.modelDb. s.create(dbname=\'db3\',created_by=self.request.user.usernameor \'Admin\')

host =self.modelHost. s.filter(ip=\'10.0.0.2\')

db =self.modelDb. s.get(dbname=\'db3\')

res = db.db_host.add(*host)

except Exception as e:

return HttpResponse(e)

return HttpResponse(str(res))

ORM 或

from django.db.modelsimport Q

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

data = serializers.serialize(\"json\",self.modelDb. s.prefetch_related(\'db_host\').filter(status=1))

filter_kwargs =dict()

filter_kwargs[\'status\'] =1

    # filter_kwargs[\'db_host__hostname__icontains\'] = \'10\'

    t = (Q(db_host__hostname__icontains=\'O\') | Q(db_host__ip__icontains=\'10\'), filter_kwargs)

aa =self.modelDb. s.prefetch_related(\'db_host\').filter(

(Q(db_host__hostname__icontains=\'O\') | Q(db_host__ip__icontains=\'100\')), **filter_kwargs)

return render_to_response(\'zabbix_host/db/test.html\', {\'db\': aa})

多对多操作(接上面OR的数据)

{% for d in db%}

<div>{{d.dbname }}</div>

{% for h in d.db_host.all %}

<div>{{h.ip }}</div>

{% endfor %}

{% endfor %}

Django Update

Update的时候不能使用get关键字

modelTs. s.filter(pk=ots.id).update(total=4,used=7,free=9) #Yes

modelTs. s.get(pk=ots.id).update(total=4,used=7,free=9) #No

POST表单复选框获取值

request.POST.getlist(\'xx\')

ORM 不等于

model.User. s.filter(~Q(name=xxx),id=111) #~Q()这个函数必须置前，否则会报错

TemplateView与DetailView不能同时被继承

class xxxView(LoginRequiredMixin, TemplateView, DetailView): # No

否则会出 \'xxx\'  has no attribute \' \'

因为TemplateView，与 DetailView下的get()冲突，get_ 被改写

API注册

因为django框架下的api_urls.py文件中

router = BulkRouter() # this is why

路由注册

router.register(r\'v1/Ts\', api.TsViewSet,\'ts\') 

TsViewSet 必须继承 BulkModelViewSet # this is result

TsViewSet(BulkModelViewSet)

假设注册其它路由继承基类 APIView

如下图

同样的在api_urls.py注册路由

url(r\'^v1/ts-api\', api.TsApi.as_view(),name=\'ts-api\')

Template Tags

在应用下建立文件夹templatetags, #在common下py文件也可以添加新功能

在文件夹创建文件__init__.py

# -*- coding: utf-8 -*-

创建自己的模板标签文件,不能与已有的模板标签文件名重复

zabbix_host_tags.py

# -*- coding: utf-8 -*-

from collectionsimport defaultdict

from djangoimport template

register = template.Library()

@register.filter

def time_format(second):

    day =int(second /86400)

    hour =int((second - day *86400) /3600)

    minute =int((second - day *86400 - hour *3600) /60)

    return str(day) +\'天, \' +str(hour) +\'小时, \' +str(minute) +\'分间\'

在模板页xxx.html加载

{% load zabbix_host_tags %}

Queryset 查看执行语句

Modelname. s.all().query

Queryset数据库字段为null判断

if column.value == None # 不能用 \'\' or null 与 php 不同