Add two json values dynamically in azure data factory - azure-data-factory-2

Question

I need to add two json value which is coming dynamically from one activity and one variable value of pipeline in data factory.
I am doing it like this as below.
#union(activity('Get Order Events Data').output, json('{"orig_orderID" : "variables('orderid')"}'))
But it is showing error.
Missing comma between arguments
What i am doing wrong here.

Answer 1

But it is showing error. Missing comma between arguments
This is the expression variables('orderid') has ' in it which splits your expression.
You should use concat() function to do this #union(activity('Get Order Events Data').output, json(concat('{"orig_orderID" :',variables('orderid'),'}'))). But this
expression can't get your expected result due to it wouldn't add in your data. It would be like this:
{
"data": [
{
"id": 145,
"order_id": 256,
"created_at": "2021-06-20T11:48:20Z",
"type": 10,
"sender": -1,
"message": null,
"previous_status": 4,
"fas_user_id": null,
"event_data": "5",
"shopkeeper_timestamp": null,
"store_id": 123
}
],
"orig_orderID": "860"
}
You can try the following expression:#union(activity('Get Order Events Data').output.data[0], json(concat('{"orig_orderID" :',variables('orderid'),'}')))
it can get the result:
{
"id": 145,
"order_id": 256,
"created_at": "2021-06-20T11:48:20Z",
"type": 10,
"sender": -1,
"message": null,
"previous_status": 4,
"fas_user_id": null,
"event_data": "5",
"shopkeeper_timestamp": null,
"store_id": 123,
"orig_orderID": "860"
}