Powershell对象未通过管道传递给Function [英] Powershell Object not being piped through to Functions
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问题描述
我有两个函数，一个创建一个自定义对象，完成后将其传递给下一个函数.问题是第二个功能不能正确接收我的对象.我没有使用管道，而是尝试设置变量，然后将该变量通过管道传递给函数.以下是在返回的对象上具有get成员输出的两个函数.所有字符串参数均已正确处理.但是这些对象根本无法工作.在New-BaseGuest的begin块中，我无法将结果分配给变量.
I have two functions one creates a custom object which once done is piped to the next function. The problem is that the second function is not receiving my object correctly. Instead of using the pipeline I have tried setting a variable and then piping that variable to the function. Below are the two functions with the output of get member on the returned object. All the string param are being processed correctly. But the objects simply wont work. In the begin block of the New-BaseGuest I am not able to assign the results to the variables.
基本上我想结束:
Get-ServerFromXML -XMLFile File -GuestName Name | New-BaseGuest
New-BaseGuest函数不完整，因为我无法使参数正常工作.
The New-BaseGuest function is incomplete as I cannot get the parameters working.
TypeName: System.Management.Automation.PSCustomObject
Name MemberType Definition
---- ---------- ----------
Equals Method bool Equals(System.Object obj)
GetHashCode Method int GetHashCode()
GetType Method type GetType()
ToString Method string ToString()
CDROM_Connected NoteProperty object CDROM_Connected=null
CDROM_ISO NoteProperty object CDROM_ISO=null
Floppy_Connected NoteProperty object Floppy_Connected=null
Floppy_ISO NoteProperty object Floppy_ISO=null
GuestType NoteProperty string GuestType=vmkernel6Guest
IPAddress NoteProperty string IPAddress=192.168.199.40
ServerName NoteProperty string ServerName=ESX-VSAN3
vCPU NoteProperty string vCPU=2
vHDD NoteProperty Object[] vHDD=System.Object[]
vNIC NoteProperty Object[] vNIC=System.Object[]
vRAM NoteProperty string vRAM=5120
function Get-ServerFromXML
{
<##>
[CmdletBinding()]
param
(
[String]
$XMLFile,
[String]
$GuestName
)
$xml = New-Object -TypeName XML
$xml.Load($XMLFile)
$Server = Select-Xml -Xml $xml -XPath ('/Servers/Server[@Name = "' + $GuestName + '" ]')
$vNicObjs = @()
$vHddobjs = @()
If ($Server.Node.Hardware.vnic.Count -ne $null)
{
$Server.Node.Hardware.vnic | %{
$NicProps = @{
NIC_ID = $_.ID;
NIC_Type = $_.Type;
NIC_StartConnected = $_.StartConnected;
NIC_MACAddress = $_.MACAddress;
NIC_WakeOnLan = $_.WakeOnLan;
NIC_PortGroup = $_.PortGroup
}
$vNicObj = New-Object -TypeName System.Management.Automation.PSObject -Property $NicProps
$vNicObjs += $vNicObj
}
}
Else
{
$NicProps = @{
NIC_ID = $Server.Node.Hardware.vnic.ID;
NIC_Type = $Server.Node.Hardware.vnic.Type;
NIC_StartConnected = $Server.Node.Hardware.vnic.StartConnected;
NIC_MACAddress = $Server.Node.Hardware.vnic.MACAddress;
NIC_WakeOnLan = $Server.Node.Hardware.vnic.WakeOnLan;
NIC_PortGroup = $Server.Node.Hardware.vnic.PortGroup
}
$vNivObj = New-Object -TypeName System.Management.Automation.PSObject -Property $NicProps
$vNicObjs += $vNivObj
}
If ($Server.Node.Hardware.vHDD.Count -ne $null)
{
$Server.Node.Hardware.vHDD | %{
$HDDProps = @{
HDD_ID = $_.ID;
HDD_Type = $_.Type;
HDD_Size = $Server.Node.Hardware.vHDD.Size;
HDD_Datastore = $_.Datastore;
HDD_StorageFormate = $_.StorageFormat
}
$vHDDObj = New-Object -TypeName System.Management.Automation.PSObject -Property $HDDProps
$vHDDObjs += $vHDDObj
}
}
Else
{
$HDDProps = @{
HDD_ID = $Server.Node.Hardware.vHDD.ID;
HDD_Type = $Server.Node.Hardware.vHDD.Type;
HDD_Size = $Server.Node.Hardware.vHDD.Size;
HDD_DataStore = $Server.Node.Hardware.vHDD.Datastore;
HDD_StorageFormat = $Server.Node.Hardware.vHDD.StorageFormat
}
$vHDDObj = New-Object -TypeName System.Management.Automation.PSObject -Property $HDDProps
$vHDDObjs += $vHDDObj
}
$ServerProps =[Ordered]@{
ServerName = $Server.Node.Description.Name;
GuestType = $Server.Node.Description.GuestType;
IPAddress = $Server.Node.Description.PrimaryIP;
vCPU = $Server.Node.Hardware.vCPU;
vRAM = $Server.Node.Hardware.vRAM;
vHDD = $vHddobjs;
vNIC = $vNicObjs;
CDROM_ISO = $Server.Node.Hardware.CDROM.ISOPath
CDROM_Connected = $Server.Node.Hardware.CDROM.StartConnected
Floppy_ISO = $Server.Node.Hardware.Floppy.ISOPath
Floppy_Connected = $Server.Node.Hardware.Floppy.StartConnected
}
$ServerObj = New-Object -TypeName System.Management.Automation.PSObject -Property $ServerProps
$ServerObj
}
function New-BaseGuest
{
<##>
[CmdletBinding(PositionalBinding = $true,
SupportsShouldProcess = $true)]
param
(
[Parameter(Mandatory = $true,
ValueFromPipeline = $false,
ValueFromPipelineByPropertyName = $true,
Position = 1)]
[string]
$ServerName,
[Parameter(Mandatory = $true,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 2)]
[string]
$GuestType,
[Parameter(Mandatory = $true,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 3)]
[string]
$vCPU,
[Parameter(Mandatory = $true,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 4)]
[string]
$vRAM,
[Parameter(Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
Position = 5)]
[system.object]
$vHDD,
[Parameter(Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
Position = 6)]
[system.object]
$vNIC,
[Parameter(Mandatory = $false,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 7)]
[string]
$CDROM_ISO = $Null,
[Parameter(Mandatory = $false,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 8)]
[string]
$FLOPPY_ISO = $Null,
[Parameter(Mandatory = $false,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 9)]
[string]
$CDROM_Connected = $Null,
[Parameter(Mandatory = $true,
ValueFromPipeline = $true,
ValueFromPipelineByPropertyName = $true,
Position = 10)]
[string]
$Floppy_Connected = $Null
)
BEGIN
{
$Datastore = ($vHDD | Where-Object { $_.HDD_ID -eq 1 } | Select-Object -Property HDD_DataStore).HDD_DataStore
$PortGroup = ($vNIC | Where-Object { $_.NIC_ID -eq 1 } | Select-Object -Property NIC_PortGroup).NIC_PortGroup
$DiskSize = ($vHDD | Where-Object { $_.HDD_ID -eq 1 } | Select-Object -Property HDD_Size).HDD_Size
$DiskFormat = ($vHDD | Where-Object { $_.HDD_ID -eq 1 } | Select-Object -Property HDD_StorageFormat).HDD_StorageFormat
}
PROCESS
{
New-VM -Name $ServerName `
-Datastore $Datastore `
-NumCPU $vCPU `
-MemoryGB $vRAM`
-DiskGB $DiskSize `
-NetworkName $PortGroup `
-DiskStorageFormat $CDROM_ISO `
-GuestID $GuestType | Out-Null
}
END
{
}
}
推荐答案
这是预期的行为. begin {}块在遇到任何管道对象之前运行，因此您无权访问begin块中通过管道输入的任何参数.
This is expected behavior. The begin {} block runs before any pipeline objects are encountered, so you have no access to any parameters that come in through the pipeline in your begin block.
process {}块对每个项目都运行一次，因此，确实需要将begin块中的代码放入其中(因为它特定于单个VM).
The process {} block is run once for each item, so the code you have in the begin block really needs to be put there (because it's specific to a single VM).
这篇关于Powershell对象未通过管道传递给Function的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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