JMESPath如何汇总数据

编程问答 2022-06-10

问题描述

az consumption usage list -m --query "sort_by([],&usageQuantity)[-5:].{name:instanceName,ser:consumedService,cat:meterDetails.meterCategory,qty:usageQuantity}"

获取json：

[
  {
    "cat": "Azure App Service","name": "weiwebapp02serviceplan","qty": "9","ser": "microsoft.web"
  },{
    "cat": "Azure App Service","name": "weiwebapp01serviceplan",{
    "cat": "Virtual Machines","name": "demoVM","qty": "9.7","ser": "Microsoft.Compute"
  },{
    "cat": "Bandwidth","name": "weiwebapp01","qty": "10",{
    "cat": "Container Registry","name": "42556f4129fb4c5db21e365ea2770211","qty": "98","ser": "Microsoft.ContainerRegistry"
  }
]

我希望得到结果= 98 + 10 + 9.7 + 9 + 9 = 135.7

我尝试过的方法：
我调用了sum函数，但是它不起作用

az consumption usage list -m --query "sort_by([],&usageQuantity)[-5:].qty:usageQuantity | sum()"

并获取消息

UnexpectedError: The command Failed with an unexpected error. Here is the traceback:
Expected 1 argument for function sum(),received 0

解决方法

我明白了，因为usageQuantity类型是string，所以必须转换为数字。

az consumption usage list -m --query "sort_by([],&usageQuantity)[-5:].usageQuantity | [].to_number(@) | sum([]) ""
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