PowerShell 比较对象生成更改报告文件

Question

我看过无数示例，并在生成变更报告方面取得了进展。但是，我被困在一个领域。这是场景...

File 1 CSV file sample data
ID,Name,Location,Gender
1,Peter,USA,Male
2,Paul,UK,Male
3,Mary,PI,Female

File 2 CSV file sample data (No ID column)
Name,Location,Gender
Peter,USA,Female
Paul,UK,Male
Mary,USA,Female
Tom,PI,Female
Barry,CAN,Male

文件2有变化和补充，即Peter变成了女性，Mary移居美国，Tom和Barry都是新人。更改报告输出文件包含更改的内容。问题是，我不知道如何从文件 1 中获取 Peter 和 Mary 的 ID 到我的更改报告中。 ID 总是空的这是我的代码...（我希望有人能解释一下。在此先感谢。）

$MyCSVFields = @('Name','Location','Gender')
$CompareResults = Compare-Object $RefObj $DffObj -Property $MyCSVFields -IncludeEqual
$NewOrChangedData = @()
Foreach($Row in $CompareResults)
{
    if( $Row.SideIndicator -eq "=>" )
    {                
        $TempObject = [pscustomobject][ordered] @{
            ID = $Row.ID
            Name = $Row.Name
            Location = $Row.Location
            Gender = $Row.Gender
            #Sanity check "Compare Indicator" = $Row.SideIndicator 
        }
        $NewOrChangedData += $TempObject
    }
}

感谢 Theo 提供了有关如何使用 Where-Object 的理解。这是更新后的代码，它对初学者来说很简单，但对我们仍然有效。

Foreach($Row in $CompareResults)
{
    if( $Row.SideIndicator -eq "=>" )
    {                
        $myOrgID = $RefObj | Where-Object Name -eq $Row.Name
        $TempObject = [pscustomobject][ordered] @{
            ID = $myOrgID.ID
            Name = $Row.Name
            Location = $Row.Location
            Gender = $Row.Gender
            #Sanity check "Compare Indicator" = $Row.SideIndicator 
        }
        $NewOrChangedData += $TempObject
    }
}

Answer 1

我也一直在纠结Compare-Object，所以我希望有比这个更好的答案：

$RefObj = @'
ID,Name,Location,Gender
1,Peter,USA,Male
2,Paul,UK,Male
3,Mary,PI,Female
'@ | ConvertFrom-Csv

$DffObj = @'
Name,Location,Gender
Peter,USA,Female
Paul,UK,Male
Mary,USA,Female
Tom,PI,Female
Barry,CAN,Male
'@ | ConvertFrom-Csv

$MyCSVFields = @('Name','Location','Gender')
$CompareResults = Compare-Object $RefObj $DffObj -Property $MyCSVFields -PassThru

$NewOrChangedData = $CompareResults | Where-Object { $_.SideIndicator -eq '=>' } | ForEach-Object { 
    $name = $_.Name
    [PsCustomObject]@{
        ID = ($RefObj | Where-Object { $_.Name -eq $name }).ID
        Name = $name
        Location = $_.Location
        Gender = $_.Gender
        #Sanity check "Compare Indicator" = $_.SideIndicator 
    }
}

$NewOrChangedData

结果：

ID Name  Location Gender
-- ----  -------- ------
1  Peter USA      Female
3  Mary  USA      Female
   Tom   PI       Female
   Barry CAN      Male

PowerShell 比较对象生成更改报告文件

PowerShell Compare-Object to produce change report file

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