CODEWITHSUNDEEP
azure-resource-manager
Gregory Suvalian
Gregory Suvalian

Reputation: 3832

How do I join array into a string in ARM template?

I have ARM template parameter which is string array (like below). How do I create variable which will be a type of string which is join of those values, that is "dominos","boeing"?

"parameters": {
      "clientObject": {
        "value": [
            "dominos",
            "boeing"
         ]
      }
   }

Upvotes: 0

Views: 2346

Answers (3)

Rachel
Rachel

Reputation: 1294

There actually is a join function in ARM, see docs.

join

join(inputArray, delimiter)

Joins a string array into a single string, separated using a delimiter. ...

Examples

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "variables": {
    "arrayString": [
      "one",
      "two",
      "three"
    ]
  },
  "resources": [],
  "outputs": {
    "firstOutput": {
      "type": "string",
      "value": "[join(variables('arrayString'), ',')]"
    },
    "secondOutput": {
      "type": "string",
      "value": "[join(variables('arrayString'), ';')]"
    }
  }
}

The output from the preceding example is:

Name Type Value
firstOutput String "one,two,three"
secondOutput String "one;two;three"

Upvotes: 0

bmoore-msft
bmoore-msft

Reputation: 8717

You can use the string() function, e.g.

[string(parameters('clientObject'))]

If you don't want the square brackets you can use the replace() function.

Upvotes: 2

4c74356b41
4c74356b41

Reputation: 72171

there is no easy way to my knowledge, the only working solution - using a loop of deployments, pseudocode would look like this:

{
    name: concat('deploy-', copyIndex(1))
    type: microsoft.resources/deployments
    apiVersion: xxx
    copy: {
        count: length(parameters('clientObject')
        name: yyy
        mode: serial // (don't remember exact name, not parallel)
    }
    properties: {
        parameters: {
            param1: parameters('clientObject')[copyIndex()]
            state: reference(concat('deploy-', copyIndex()).outputs.your_output.value
        }
    }
}

to retrieve it you would use:

reference(concat('deploy-', length(parameters('clientObject')).outputs.your_output.value

and in the nested template you would just get the current param1 passed to the template and concat it to the state (where state it the output from the previous nested template run)

if you know the length of the array (and its static) you can hardcore a concat function or (better) do a join outside of the arm template

Upvotes: 1

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