Parse json values into a single row - json

Question

{
"value": [{
"ExternalKey": "12345",
"PortfolioId": "ABC",
"InceptionDate": null,
"TerminationDate": null,
"Version": 2,
"SourceRef": "ABC",
"MasterSeries": [{
"Points": [{
"Date": "1900-01-01T00:00:00+00:00",
"Name": "XYZ Name",
"Type": "IP",
"Status": "Active",
"Version": 1
}],
"ExternalKey": "12345",
"Version": 1,
"IsDeleted": false,
"SourceRef": "ABC"
}]
}]
}
I tried to loop through each level and manually selecting the keys
ForEach($d in $json.value) { $row=$d.column1+","+ $d.column2 ..
$rootProps = $d| Get-Member | Where-Object { $_.MemberType -match "Property"}
$rootProps | ForEach-Object {
if($_.Name -eq "MasterSeries") {
$d | select -Expand MasterSeries | select-object * -ExcludeProperty Points | ForEach { $row = $_.column1 + "," $_.column2 ..
}
}
and so on..... but when I export it to Out-File "Export.csv" and try importing it gives me a UTF error. Is there a better way to achieve?

Answer 1

If this helps any, here's the typical way to loop through json properties in powershell 5 using the hidden psobject.properties. You might search for "flatten json".
$a = get-content file.json | convertfrom-json
$a.value[0].psobject.properties | select name,value
Name Value
---- -----
ExternalKey 12345
PortfolioId ABC
InceptionDate
TerminationDate
Version 2
SourceRef ABC
MasterSeries

Answer 2

For this you will need to create a recursive function.
To make things easier, I recommend you to use the ConvertFrom-Json -AsHashTable parameter which will return [HashTable] objects rather than [PSCustomObject] Objects
Function Get-Values($Object) {
if ($Object -is [String]) { $Object } # A string is also Enumerable
elseif ($Object -is [Collections.IDictionary]) { $Object.get_Values() | ForEach-Object { Get-Values $_ } }
elseif ($Object -is [Collections.IEnumerable]) { $Object.GetEnumerator() | ForEach-Object { Get-Values $_ } }
else { $Object }
}
$Object = ConvertFrom-Json -AsHashTable '{
"value": [
{
"ExternalKey": "12345",
"PortfolioId": "ABC",
"InceptionDate": null,
"TerminationDate": null,
"Version": 2,
"SourceRef": "ABC",
"MasterSeries": [
{
"Points": [
{
"Date": "1900-01-01T01:00:00+01:00",
"Name": "XYZ Name",
"Type": "IP",
"Status": "Active",
"Version": 1
}
],
"ExternalKey": "12345",
"Version": 1,
"IsDeleted": false,
"SourceRef": "ABC"
}
]
}
]
}'
Get-Values $Object
12345
False
1
IP
Monday, January 1, 1900 1:00:00 AM
XYZ Name
Active
ABC
1
12345
2
ABC
ABC