Check if jObject exists in json File - Powershell - json

Question

how can I check if the Object 'Production' in my json-File exists in Powershell?
an extract of my json File:
[
{
"UID": "x,
"Office": "xy",
"Production": "a"
}
]
In this case the key "Production" does exist in the json File. But that is not always the case.
How can I check if it exists via Powershell? With Get-Member?
my approach:
$json = Get-Content "C:\file.json" | ConvertFrom-Json
foreach ($item in $json) {
if (Get-Member -InputObject $item.Production) {Write-Host "Production exists"}
else {Write-Host "Production does not exist"}
}
THANKS!

Answer 1

You could check if the property exists by accessing the object's PSObject.Properties, one of the many ways to validate could be using the .Item(..) method:
$json = '[{ "Production": "Hello" }, { "OtherProp": "Nothing Here" }]' | ConvertFrom-Json
$count = 0
foreach($item in $json) {
$index = 'Object {0}' -f $count++
if($prop = $item.PSObject.Properties.Item('Production')) {
"{0}: Production Exists and it's value is: '{1}'" -f $index, $prop.Value
}
else {
"{0}: No property with name Production" -f $index
}
}
You can also use the property name to index to the NoteProperty Object with the following syntax:
if($prop = $item.PSObject.Properties['Production']) {
The first object from the example Json has a property with Name Production and Hello as Value while the second object does have the specified property. Above would result in:
Object 0: Production Exists and it's value is: 'Hello'
Object 1: No property with name Production