Extract data from json file throush "powershell" command - json

Question

I am trying to get data from my json file but my code is still not working. Do you have any suggestion ?
JSON file :
"nodes": [
{
"id": "elfe",
"apps": [
{
"id": "man1",
"age" = "5"
"power" ="strenght"
},
{
"id": "man2",
"age" = "10"
"power" ="strenght"
}],
"id": "monster",
"apps": [
{
"id": "man3",
"age" = "5"
"power" ="strenght"
},
{
"id": "man4",
"age" = "10"
"power" ="strenght"
}],
And there, my code in PowerShell. I just want to get man1, man2, man3, man4 values in my file for each id elfe and monster like that :
man1
man2
in one file and in the other file:
man3
man4
My batch script :
Powershell -Nop -C "(Get-Content .\config.json |ConvertFrom-Json).Nodes | Select-Object -ExpandProperty id | Where-Object id -eq elfe" >> file.txt
EDIT : I can't modify my JSON file...

Answer 1

Your json is not valid, below is corrected version with data extraction:
$json = #"
{
"nodes":[
{
"id":"elfe",
"apps":[
{
"id":"man1",
"age":5,
"power":"strenght"
},
{
"id":"man2",
"age":10,
"power":"strenght"
}]},
{ "id":"monster",
"apps":[
{
"id":"man3",
"age" :"5",
"power":"strenght"
},
{
"id":"man4",
"age":"10",
"power":"strenght"
}]}
]}
"#
$data = $json | ConvertFrom-Json
$data.nodes | where {$_.id -eq "elfe"} | foreach {$_.apps.id >> "elfe.txt"}
But probably you just had troubles with quoting that command. Below is a working version. I replaced >> with tee - it will overwrite output file and also prints results on the screen.
powershell -nop -c "(cat test.json | ConvertFrom-Json).nodes | where {$_.id -eq 'elfe'} | foreach {$_.apps.id} | tee out.txt"