Azure ARM 模板 : Is there a way expand a two layer nest-array into one layer?

Question

我有一个参数如下，它是一个带有嵌套内部数组的数组

"parameters": {
  "input": {
    "type": "array",
    "defaultValue": [
      {
        "clusterName": "clusterNameA",
        "databaseName": "databaseNameA",
        "innerArray": {
          "value": [
            {
              "principalId": "id1",
              "role": "Viewer"
            },
            {
              "principalId": "id2",
              "role": "Ingestor"
            }
          ]
        }
      },
      {
        "clusterName": "clusterNameB",
        "databaseName": "databaseNameB",
        "innerArray": {
          "value": [
            {
              "principalId": "id3",
              "role": "Viewer"
            },
            {
              "principalId": "id4",
              "role": "Ingestor"
            }
          ]
        }
      }
    ]
  }
}

是否可以通过扩展innerArrays来创建一个数组变量，如下所示？这背后的背景是ARM似乎不直接支持嵌套复制，所以我尝试通过扩展来解决它。

[
  {
    "clusterName": "clusterNameA",
    "databaseName": "databaseNameA",
    "principalId": "id1",
    "role": "Viewer"
  },
  {
    "clusterName": "clusterNameA",
    "databaseName": "databaseNameA",
    "principalId": "id2",
    "role": "Ingestor"
  },
  {
    "clusterName": "clusterNameB",
    "databaseName": "databaseNameB",
    "principalId": "id3",
    "role": "Viewer"
  },
  {
    "clusterName": "clusterNameB",
    "databaseName": "databaseNameB",
    "principalId": "id4",
    "role": "Ingestor"
  }
]

我不知道该怎么做

Answer 1

因为您已使用 azure-bicep 标记了此问题，所以我觉得您可以使用这些函数来帮助您解决问题:

• map :

Applies a custom mapping function to each element of an array.

• flatten :

Takes an array of arrays, and returns an array of subarray elements, in the original order. Subarrays are only flattened once, not recursively.

这对我有用:

// main.bicep
param input array

output flatten array = flatten(map(input, cluster => map(cluster.innerArray.value, inner => {
  clusterName: cluster.clusterName
  databaseName: cluster.databaseName
  principalId: inner.principalId
  role: inner.role
})))

等效的 ARM (az bicep build --file main.bicep) 看起来像这样:

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "input": {
      "type": "array"
    }
  },
  "resources": [],
  "outputs": {
    "flatten": {
      "type": "array",
      "value": "[flatten(map(parameters('input'), lambda('cluster', map(lambdaVariables('cluster').innerArray.value, lambda('inner', createObject('clusterName', lambdaVariables('cluster').clusterName, 'databaseName', lambdaVariables('cluster').databaseName, 'principalId', lambdaVariables('inner').principalId, 'role', lambdaVariables('inner').role))))))]"
    }
  }
}

并给出这个结果:

[
  {
    "clusterName": "clusterNameA",
    "databaseName": "databaseNameA",
    "principalId": "id1",
    "role": "Viewer"
  },
  {
    "clusterName": "clusterNameA",
    "databaseName": "databaseNameA",
    "principalId": "id2",
    "role": "Ingestor"
  },
  {
    "clusterName": "clusterNameB",
    "databaseName": "databaseNameB",
    "principalId": "id3",
    "role": "Viewer"
  },
  {
    "clusterName": "clusterNameB",
    "databaseName": "databaseNameB",
    "principalId": "id4",
    "role": "Ingestor"
  }
]