获取 ARM 模板中对象 属性 名称的数组

Question

在 ARM 模板中有没有办法获取包含 JSON 对象的 属性 名称的数组？ 我在 the documentation 中没有看到任何明显的东西。我看到的最接近的是 length(object) 来获取对象的 属性 计数，但我认为我什至无法使用复制循环来获取 属性 名称。

我要实现的具体方案是将具有附加插槽粘性设置的 Web appsettings 部署到暂存插槽：

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "webSiteName": {
      "type": "string"
    },
    "globalAppSettings": {
      "type": "object"
    },
    "slotName": {
      "type": "string"
    },
    "slotAppSettings": {
      "type": "object"
    },
    "slotStickySettings": {
      "type": "array",
      // but getPropertyNames(object) is not a real function :(
      "defaultValue": "[getPropertyNames(parameters('slotAppSettings'))]"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/sites/config",
      "name": "[concat(parameters('webSiteName'), '/appsettings')]",
      "apiVersion": "2018-02-01",
      "properties": "[parameters('globalAppSettings')]"
    },
    {
      "type": "Microsoft.Web/sites/slots/config",
      "name": "[concat(parameters('webSiteName'), '/', parameters('slotName'), '/appsettings')]",
      "apiVersion": "2018-02-01",
      "properties": "[union(parameters('globalAppSettings'), parameters('slotAppSettings'))]"
    },
    {
      "type": "Microsoft.Web/sites/config",
      "name": "[concat(parameters('webSiteName'), '/slotconfignames')]",
      "apiVersion": "2015-08-01",
      "properties": {
        "appSettingNames": "[parameters('slotStickySettings')]"
      }
    }
  ]
}

Answer 1

没有直接的方法可以做到这一点，因为没有 return 对象属性的函数。我能够通过将对象转换为字符串然后解析它以找到 属性 名称来完成它。只要您的 属性 值中没有逗号，它就应该可以工作。如果需要，您也可以添加一些检查来处理这种情况。

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "testSettings": {
            "type": "object",
            "defaultValue": {
                "a": "demo value 1",
                "b": "demo value 2"
            }
        }
    },
    "variables": {
        "delimiters": [","],
        "settingArray": "[split(replace(replace(replace(string(parameters('testSettings')), '{', ''), '}', ''), '\"', ''), variables('delimiters'))]",
        "propNameArray": {
            "copy": [
                {
                    "name": "copyPropertyNames",
                    "count": "[length(variables('settingArray'))]",
                    "input": "[substring(variables('settingArray')[copyIndex('copyPropertyNames')], 0, indexOf(variables('settingArray')[copyIndex('copyPropertyNames')], ':'))]"
                }
            ]
        }
    },
    "resources": [],
    "outputs": {
        "paramOutput": {
            "type": "array",
            "value": "[variables('propNameArray').copyPropertyNames]"
        }
    }
}