Django中利用js來操作數據的常規操作一般為點(.)操作符來獲取字典或列表的數據，一般如{{data.0}}，{{data.arg}}
但有時如果數據是嵌套類型的數據時，直接獲取某個值就變得困難了，比如下面的格式要獲取
correct中qxl的值
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}
}
這時候如果改變數據格式為列表中的無嵌套字典格式比較麻煩，可以自定義過濾器來獲取數據，
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']
在模板中就可以以這樣寫
<!-- the second important page of the project--> {% load staticfiles %} <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>超標信息</title> <script src="{% static 'js/a-mynewjs.js' %}"></script> </head> <body> {{ guestSetArgs|safe }}<br><br><br> {{ warningdata|safe }}<br><br> <script> {% 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}} 超出閥值 閥值：{{guestSetArgs|getArgQxlValue:j}} 檢測值：{{warningdata|getArgQxlValue:j}}<br>" document.write(setArgStr); } {% endfor %} {% endfor %} </script> </body> </html>
形如{{warningdata|getArgQxlValue:j}}，就可以獲取到里面的值了
稍做美化
參考自https://docs.djangoproject.com/en/2.2/howto/custom-template-tags/