How to create a list of map objects within a JSON object using for....in loop

Terraform
1

We are trying to create below mentioned JSON in terraform. Basically list of map objects
Currently we are trying to use for…in loop which is iterating over a list of map (i.e. list(map(string)). Can someone please share some code for dynamically generating this list using inline for loop ?

{
    "MyApp": [
        {
            "key1": "value1" // this is the map object
        },
        {
            "key2": "value2" // this is another map object
        }
    ]
}

My code:

variable "my_list" {
  description = ""
  type        = list(map(string))
  default     = [
    {
       key = key1
       value = value1
    },
    {
       key = key2
       value = value2
    }
  ]
}

event_pattern =  jsonencode({
   "MyApp": [ for item in my_list : item["key"] => item["value"]]
})

This is throwing me syntax error '(', ']' or if expected, got '=>'. Can you please help me get the right way to achieving this JSON.

Thanks

2

Hi @gtwuser,

You are using a list comprehension, not a map, so you can’t use the => mapping syntax. I think you’re asking how to create a map for each value, in which case you need to use { and } for a map literal. The final piece is probably the key value, which must be wrapped in () so that it is evaluated rather than taken as a literal value.

Together that would look like:

event_pattern =  jsonencode({
   "MyApp": [ for item in var.my_list : {(item["key"]): item["value"]} ]
})
1 Like
3

Thank you so much, will give it a try and update back

4

@jbardin we facing another related issue now, I have raised a query for the same. Im not sure if its because of the above changes we made, but it should not be. Link for reference: LimitExceededException: The requested resource exceeds the maximum number allowed for AWS EB rules. I can confirm whether our solution works once this above issues is resolved.

5

Although my preceeding issue is not resolved, but your suggested answer worked. Thanks again.