Sorting objects by multiple properties

Question

I'm trying to use PowerShell for sorting objects representing application verions

$versionsObjects = @{
    Major = 3
    Minor = 2
    Bugfix = 1
},
@{
    Major = 3
    Minor = 5
    Bugfix = 1
},
@{
    Major = 1
    Minor = 2
    Bugfix = 1
},
@{
    Major = 4
    Minor = 2
    Bugfix = 1
}

$sortedVersions = ($versionsObjects | Sort-Object -Property @{Expression="Major"; Descending=$true}, @{Expression="Minor" ;Descending=$true}, @{Expression="Bugfix"; Descending=$true})
$sortedVersions | %{echo ( "{0}.{1}.{2}" -f $_.Major, $_.Minor, $_.Bugfix)}

The output is in the same order as input:

3.2.1
3.5.1
1.2.1
4.2.1

But it should be

4.2.1
3.5.1
3.2.1
1.2.1

What am I doing wrong?

Answer 1

Your expressions aren't quite right. Try this for the Sort-Object part:

Sort-Object -Property @{Expression={$_.Major}; Descending=$true}, @{Expression={$_.Minor} ;Descending=$true}, @{Expression={$_.Bugfix}; Descending=$true})