js提取指定网站内容(Django中利用js来操作数据的常规操作(图))

　　js提取指定网站内容(Django中利用js来操作数据的常规操作(图))

　　Django中使用js操作数据的一般操作一般是点(.)操作符来获取字典或列表的数据，如{{data.0}}、{{data.arg}}

　　但是有时候如果数据是嵌套类型的数据，直接获取某个值就变得很困难，比如下面的格式获取

　　qxl 的值正确

startArgsSet={"correct":{"qxl":0,"kkx":0},"reliable":{"qxl":0,"kkx":0},"security":{"qxl":0,"kkx":0},"understand":{"qxl":0,"kkx":0},"entropy":{"qxl":0,"kkx":0},

"mature":{"qxl":0,"kkx":0},"active":{"qxl":0,"kkx":0},"service":{"qxl":0,"kkx":0},"file":{"qxl":0,"kkx":0},

"tech":{"qxl":0,"kkx":0},"property":{"qxl":0,"kkx":0},"organize":{"qxl":0,"kkx":0},"develop":{"qxl":0,"kkx":0},

"source":{"qxl":0,"kkx":0},"update":{"qxl":0,"kkx":0},"fix":{"qxl":0,"kkx":0},

"quality":{"qxl":0,"kkx":0},"meanNum":{"qxl":0,"kkx":0},"variance":{"qxl":0,"kkx":0}

}

　　这时候如果把数据格式改成列表中的非嵌套字典格式比较麻烦，可以自定义过滤器获取数据，

from django.template.defaulttags import register

@register.filter

def getArgQxlValue(dictionary,arg):

return dictionary[arg]['qxl']

@register.filter

def getArgKkxValue(dictionary,arg):

return dictionary[arg]['kkx']

@register.filter

def getArgName(dictionary,arg):

return dictionary[arg]['name']

　　你可以在模板中这样写

{% load staticfiles %}

超标信息

{{ guestSetArgs|safe }}

{{ warningdata|safe }}

{% for i in guestSetArgs %}

{% for j in warningdata %}

if("{{i}}"=="{{j}}")

{

if(Number({{warningdata|getArgQxlValue:j}})>Number({{guestSetArgs|getArgQxlValue:i}}))

var setArgStr="{{warningdata|getArgName:i}} 超出阀值  阀值：{{guestSetArgs|getArgQxlValue:j}}  检测值：{{warningdata|getArgQxlValue:j}}

"

document.write(setArgStr);

}

{% endfor %}

{% endfor %}

　　如{{warningdata|getArgQxlValue:j}}，可以获取里面的值

　　稍微美化

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