PowerShell Loop through nested json and remove property - json

Question

I am getting some json data from a API, however I don't need most of this data. I am trying to remove some fields so that the when I save this data as a json file it isn't so large. I doesnt seem to be removing any of the fields I am trying to remove.
Code:
$Response = Invoke-RestMethod -Uri "https://mtgjson.com/api/v5/AllPrintings.json" -Method GET
$Obj = ConvertFrom-Json $Response
$Obj.PSObject.Properties.Remove('booster')
$Obj.PSObject.Properties.Remove('cards')
$Obj | ConvertTo-Json | Out-File ./All-Sets-Data.json -Force
Json:
{
"data": {
"10E": {
"baseSetSize": 383,
"block": "Core Set",
"booster": "#{default=}",
"cards": "",
"code": "10E",
...
},
"2ED": {
"baseSetSize": 302,
"block": "Core Set",
"booster": "#{default=}",
"cards": "",
"code": "2ED",
...
},
"2XM": {
"baseSetSize": 332,
"booster": "#{default=}",
"cards": "",
"code": "2XM",
...
},
...
}
}

Answer 1

$Obj.data.'10E'.PSObject.Properties.Remove('booster')
$Obj.data.'10E'.PSObject.Properties.Remove('cards')
$Obj.data.'2ED'.PSObject.Properties.Remove('booster')
# and so on
The above code snippet should work. However, you can do all in a one step by calling the following (recursive) function RemoveProperty:
Function RemoveProperty {
param (
# A PSCustomObject
[Parameter( Mandatory, ValueFromPipeline )] $Object,
# A list of property names to remove
[Parameter( Mandatory )] [string[]]$PropList,
# recurse?
[Parameter()] [Switch]$Recurse
)
# Write-Host $Object -ForegroundColor Cyan
foreach ( $Prop in $PropList ) {
$Object.PSObject.Properties.Remove($prop)
}
# Write-Host $Object -ForegroundColor Green
if ( $Recurse.IsPresent ) {
foreach ($ObjValue in $Object.PSObject.Properties.Value) {
# Write-Host $ObjValue -ForegroundColor Yellow
if ( $ObjValue.GetType().Name -eq 'PSCustomObject' ) {
$ObjValue | RemoveProperty -PropList $PropList -Recurse
}
}
}
}
# sample usage:
$Obj = ConvertFrom-Json $Response
RemoveProperty -Object $Obj -PropList 'booster','cards' -Recurse
$Obj | ConvertTo-Json | Out-File ./All-Sets-Data.json -Force
(Please note that the RemoveProperty function contains some Write-Host in commented lines; originally used used for debugging purposes).