Append object to array

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Posted on 11 Dec 2024 17:50:29 by xvzms

Hi,
I want to get an array like this:

[
  {
    "sender": "Sales",
    "message": "Please clarify",
    "timestamp": "12/11/2024 4:36 PM"
  },
  {
    "sender": "Recipient",
    "message": "This is a risk total.",
    "timestamp": "12/11/2024 4:37 PM"
  }
]

I tried to create Power Automate workflow, but got this:

[
  "{\n    \"sender\": \"Sales\",\n    \"message\": \"Please clarify\",\n    \"timestamp\": \"12/11/2024 4:36 PM\"\n},",
  "{\n    \"sender\": \"Recipient\",\n    \"message\": \"This is a risk total.\",\n    \"timestamp\": \"12/11/2024 4:37 PM\"\n},"
]

This is my flow:

How can I achieve this?

Categories:

Business Process Flows

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Pstork1 66,545 Most Valuable Professional on 11 Dec 2024 at 19:00:59

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Append object to array

The problem is that the values in the Compose will be interpreted as a String, not a JSON array. Just declare the array in the Initialize Variable action. That will give you the array you want.

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SpongYe 5,580 Super User 2025 Season 1 on 11 Dec 2024 at 18:12:41

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Append object to array

Hi @xvzms

Replace this:

With this the current item:

My results:
Suggested answer

SwatiSTW 577 Super User 2025 Season 1 on 11 Dec 2024 at 18:09:54

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Append object to array

In your Power Automate flow, use the "Initialize Variable" action. Set the type to Array and name it something like MyArray.

Use the "Append to Array Variable" action to add objects to the array. For example:

{
"sender": "Sales",
"message": "Please clarify",
"timestamp": "12/11/2024 4:36 PM"
}
Add another similar action for the next object:

{
"sender": "Recipient",
"message": "This is a risk total.",
"timestamp": "12/11/2024 4:37 PM"
}
Make sure you are adding the objects directly as shown above. Do not enclose them in quotes or use any string-related expressions.

To confirm, add a "Compose" action after you've appended all objects. Use the array variable MyArray in the "Input" field of the Compose action.

Run the flow. The output from the "Compose" action should now show an array of objects, not strings.