powershell convertfrom-json select-对象差异

Question

考虑以下 json 负载（只是 "az group list" 中的示例片段）：

[

    {
        "id": "/subscriptions/1f512sf9-112c-4a7a-a580-665afe4761f4/resourceGroups/dev-rg",
        "location": "northeurope",
        "managedBy": null,
        "name": "dev-rg",
        "properties": {
          "provisioningState": "Succeeded"
        },
        "tags": {
          "Application": "Integrations",
          "Department": "Development Team",
          "DeployedDate": "09/01/2020",
          "Environment": "DEV",
          "FundedBy": "INT",
          "InterfaceId": "IFUS_007.1",
          "Project": "INT"
        },
        "type": "Microsoft.Resources/resourceGroups"
      }
    ]

谁能解释一下为什么下面的方法有效

PS C:\Windows\system32> az group list | convertfrom-json | select-object @{n='RSG';e={$_.name}}

RSG
---
{dev-rg}

为什么下面没有（returns空白）

PS C:\Windows\system32> az group list | convertfrom-json | select-object name

name
----

Answer 1

这是关于 ConvertFrom-Json 和管道的 Windows PowerShell 错误。

分组命令 () 以便正确评估它们。

(az group list | ConvertFrom-Json) | Select-Object name

已在 PowerShell Core 中修复。

Answer 2

添加到 answer, you could also use Get-AzResourceGroup Cmdlet from Azure PowerShell, which will give you a PowerShell object to work with immediately. This is easier than converting the JSON output from Azure CLI using az group list to a System.Management.Automation.PSCustomObject with ConvertFrom-Json。

将所有资源组放在一列中 Name:

Get-AzResourceGroup | Select-Object -Property @{Name = "Name"; Expression = { $_.ResourceGroupName } }

或者只保留默认的 ResourceGroupName 列：

Get-AzResourceGroup | Select-Object -Property ResourceGroupName

powershell convertfrom-json select-对象差异

powershell convertfrom-json select-object differences

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