ARM template error on storage Queue Service as Optional Parameter - azure

Question

I was trying to deploy queue service as optional parameter with default blank value, template first create storage account then queue service as nested resource. template throwing error Message=Deployment template validation failed: 'The template resource '[concat(parameters('storageName'),'/default/',parameters('storagequeues')[copyIndex()])]'
at line '91' and column '9' is not valid: The language expression property array index '0' is out of bounds.
for some reason schema validating nested resource name before condition evaluation. Is this expected behavior ? if not please suggest work around.
I have tried with condition "condition": "[not(contains(parameters('storagequeues'),'none'))]", and Having defaultvalue="none" then it won\t create queue. it works fine but this is not desired way of doing.

Answer 1

This template creating a queue under a storage account may meet you need.
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"storageAccountName": {
"type": "string",
"metadata": {
"description": "Specifies the name of the Azure Storage account."
}
},
"queueName": {
"type": "string",
"metadata": {
"description": "Specifies the name of the blob container."
}
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]",
"metadata": {
"description": "Specifies the location in which the Azure Storage resources should be deployed."
}
}
},
"resources": [
{
"type": "Microsoft.Storage/storageAccounts",
"apiVersion": "2019-06-01",
"name": "[parameters('storageAccountName')]",
"location": "[parameters('location')]",
"sku": {
"name": "Standard_LRS",
"tier": "Standard"
},
"kind": "StorageV2",
"properties": {
"accessTier": "Hot"
},
"resources": [
{
"type": "queueServices/queues",
"apiVersion": "2019-06-01",
"name": "[parameters('queueName')]",
"dependsOn": [
"[parameters('storageAccountName')]"
]
}
]
}
]
}
I have seen this 'The language expression property array index '0' is out of bounds.' error before, but the reason may different. I cannot see your defaultValue in 'storagequeue', maybe the null array cause this issue. You can refer to this.