Powershell - Json to csv - values in separate rows - json

Question

I am trying to get the data into a csv from an InvokeWeb request. Currently there are only 2 different values with the individual values in it, but later also times more. It makes the headers of the table, and the correct number of columns, but throws the 2 different values into a cell in both rows. So how can I prevent it from looking like this? I have already read about AddMember or +=, but did not find the right way.
$valstring = iwr -Proxy http://my-proxy -ProxyUseDefaultCredentials -Method GET -Uri https://my-URL -Headers #{'ContentTyp' = 'application/json';"X-Api-Key" = "my-API-Key"} -UseBasicParsing | Select-Object Content | foreach {$_.Content}
$pathToOutputFile = "H:\Wichtiges\json2csvexport.csv"
$deckung = $valstring | ConvertFrom-Json | ForEach-Object {
foreach ($uuid in $_ ) {
[PsCustomObject] #{
name = $_.name | Out-String
version = $_.version | Out-String
active = $_.active | Out-String
}
}
}
$deckung | Export-Csv $pathToOutputFile -NoTypeInformation -UseCulture
The Json-Data looks like that
[
{
"name": "App1",
"version": "1.1.1",
"uuid": "a74a1969-f57d-437b-943f-d4c3dd3bc4bb",
"active": true,
"metrics": {
"high": 617,
"medium": 1250,
"low": 103,
}
},
{
"name": "App2",
"version": "1.3.1",
"uuid": "59eda14a-56a6-4dc6-8238-dd168bd0df3f",
"active": true,
"metrics": {
"high": 6,
"medium": 13,
"low": 0,
}
}
]
But it always comes out like that (second and third together and fourth and fifth row together):
|name | version | active |
|------|-----------|---------|
|App1 | 1.1.1 | true |
|App2 | 1.3.1 | true |
|App1 | 1.1.1 | true |
|App2 | 1.3.1 | true |
-----------------------------
How can I change it to get one per row that it looks like:
|name | version | active |
|------|-----------|---------|
|App1 | 1.1.1 | true |
|App2 | 1.3.1 | true |
-----------------------------
Thx
Kind regards
Edit (Solution):
That solution works for me, because I can put things from mectrics into the csv and give the Heading an other name:
Select-Object #{Name='Name';Expression={$_.name}},
#{Name='Version';Expression={$_.version}},
#{Name='Active';Expression={$_.Active}},
#{Name='Risk-High';Expression={$_.metrics.high}}
Edit (Another question):
How can I prevent numbers in the csv from being converted to dates?
Thx

Answer 1

Try the following:
$pathToOutputFile = "H:\Wichtiges\json2csvexport.csv"
# Note:
# * the use of Invoke-*RestMethod*, which has ConvertFrom-Json *built in*.
# * the (...) around it, to ensure that the array is *enumerated*.
(Invoke-RestMehod -Proxy http://my-proxy -ProxyUseDefaultCredentials -Method GET -Uri https://my-URL -Headers #{'ContentType' = 'application/json';"X-Api-Key" = "my-API-Key"}) |
Select-Object name, version, active |
Export-Csv $pathToOutputFile -NoTypeInformation -UseCulture
As for what you tried:
Your foreach ($uuid in $_ ) loop mistakenly used $_ - the array to loop over - instead of $uuid - the iteration variable containing the element at hand.
The simpler alternative, to explicit enumeration is to wrap a call to ConvertFrom-Json / Invoke-RestMethod in (...) in order to automatically force enumeration of an array being returned.
Note that this is no longer necessary in PowerShell (Core) 7+, where arrays are enumerated by default (and you need -NoEnumerate in order to send an array as a whole through the pipeline, which is the invariable default behavior in Windows PowerShell).
For simple stringification of a value, Out-String is the wrong tool, primarily because it - unexpectedly - adds a trailing newline to the output - see GitHub issue #14444.
Use a [string] cast instead; however, given that Export-Csv implicitly performs such a stringification for you, there's no need to do it explicitly, allowing you to use a simple Select-Object to pick the properties of interest, as shown above.