Converting JSON to NDJSON with Powershell - json

Question

I'm trying to convert a text file that has an array of json objects to an NDJSON formatted file for another team to consume.
I've almost got it, except for one problem. I have an array of objects nested inside the JSON (which then has nested arrays and objects inside of it, the structure gets pretty complex, I'll include a sample below) and for whatever reason, when I use ConvertFrom-JSON it drops this nested array and in my output, I end up with a blank string for that key, instead of the nested array object. I tried using the -Depth flag but when I do that my output file ends up blank, which doesn't make a ton of sense to me. I don't have a whole lot of experience with powershell, so I'm not really sure where I'm going wrong here.
Code:
$JSONSourceFile = Get-Content -Path "input/sample.json" | ConvertFrom-JSON
$NDJSONTargetFile = "output/sample.json"
New-Item $NDJSONTargetFile -ItemType file
for ( $i = 0 ; $i -lt $JSONSourceFile.Length ; $i++) {
$item = $JSONSourceFile.item($i)
$row = ($item | ConvertTo-JSON -Compress)
Add-Content $NDJSONTargetFile $row
}
Input File:
[
{
"id": "1",
"TransactionDttm": "2021-02-22T15:45:00:00.000-05:00",
"Array1": [
{
"UserID": "ak2354",
"Preferences": [
{
"CagegoryID": "01",
"CategoryName": "Reminder",
"Channels": [
{
"ChannelID": "1",
"ChannelName": "Email",
"Preference": "Y"
},
{
"ChannelID": "2",
"ChannelName": "Text",
"Preference": "N"
}
]
}
]
}
]
},
{
"id": "2",
"TransactionDttm": "2021-02-22T15:45:00:00.000-05:00",
"Array1": [
{
"UserID": "ak1234",
"Preferences": [
{
"CagegoryID": "01",
"CategoryName": "Reminder",
"Channels": [
{
"ChannelID": "1",
"ChannelName": "Email",
"Preference": "Y"
},
{
"ChannelID": "2",
"ChannelName": "Text",
"Preference": "Y"
}
]
}
]
}
]
},
{
"id": "3",
"TransactionDttm": "2021-02-22T15:45:00:00.000-05:00",
"Array1": [
{
"UserID": "ak5678",
"Preferences": [
{
"CagegoryID": "01",
"CategoryName": "Reminder",
"Channels": [
{
"ChannelID": "1",
"ChannelName": "Email",
"Preference": "N"
},
{
"ChannelID": "2",
"ChannelName": "Text",
"Preference": "N"
}
]
}
]
}
]
}
]
And then when I convert it to the output, this is what I get:
{"id":"1","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak2354","Preferences":""}]}
{"id":"2","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak1234","Preferences":""}]}
{"id":"3","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak5678","Preferences":""}]}

Answer 1

Thanks to the comment from Doug Maurer I figured it out, I was adding -Depth to my ConvertFrom-Json command when it should have been in my ConvertTo-Json command. This is the final script and what it gives me:
$JSONSourceFile = Get-Content -Path "input/sample.json" | ConvertFrom-JSON
$NDJSONTargetFile = "output/sample.json"
New-Item $NDJSONTargetFile -ItemType file
for ( $i = 0 ; $i -lt $JSONSourceFile.Length ; $i++) {
$item = $JSONSourceFile.item($i)
$row = ($item | ConvertTo-JSON -Compress -Depth 20)
Add-Content $NDJSONTargetFile $row
}
and the output:
{"id":"1","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak2354","Preferences":[{"CagegoryID":"01","CategoryName":"Reminder","Channels":[{"ChannelID":"1","ChannelName":"Email","Preference":"Y"},{"ChannelID":"2","ChannelName":"Text","Preference":"N"}]}]}]}
{"id":"2","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak1234","Preferences":[{"CagegoryID":"01","CategoryName":"Reminder","Channels":[{"ChannelID":"1","ChannelName":"Email","Preference":"Y"},{"ChannelID":"2","ChannelName":"Text","Preference":"Y"}]}]}]}
{"id":"3","TransactionDttm":"2021-02-22T15:45:00:00.000-05:00","Array1":[{"UserID":"ak5678","Preferences":[{"CagegoryID":"01","CategoryName":"Reminder","Channels":[{"ChannelID":"1","ChannelName":"Email","Preference":"N"},{"ChannelID":"2","ChannelName":"Text","Preference":"N"}]}]}]}