我希望能够通过管道为我正在构建的模块传递多个值。该模块是围绕特定的SQL数据库架构构建的,因此我设计了此函数以返回该架构的所有数据库:
function Get-TRISDatabases {
param (
[parameter(mandatory=$false)]
[string]$ServerAddress = "localhost",
[parameter(mandatory=$false)]
[switch]$Name
)
Begin {
$Query_GetDatabases = "
SELECT Name, create_date, user_access_desc, state_desc, recovery_model_desc FROM sys.databases WHERE CASE
WHEN state_desc = 'ONLINE' THEN OBJECT_ID(QUOTENAME(name) + '.[dbo].[CRISFiles]', 'U')
END IS NOT NULL
"
}
Process {
## Get Data
$rValue = Invoke-Sqlcmd2 -Query $Query_GetDatabases -ServerInstance $ServerAddress
## Return values
if ($Name) {
Return $rValue.Name
}
else {
Return $rValue
}
}
End {
## Purge Variables
Remove-Variable Query_GetDatabases, rValue
}
}
这工作正常,但是我想要的是能够通过管道传递$ serverAddress和$ rValue变量。这样我就可以运行其他命令,例如:
Get-TRISDatabases -name -ServerAddress "server1" | Remove-TRISDeadLinks
而不是我现在所拥有的:
Get-TRISDatabases -name -ServerAddress "server1" | Remove-TRISDeadLinks -ServerAddress "server1"
我也尝试将服务器地址放在rValue对象中,但是我必须更改其他所有脚本以使用服务器地址rValue.ServerAddress才能工作。
删除-TRISDeadLinks参数块:
param (
[parameter(
Mandatory=$false, Position=1,ValueFromPipeline=$false
)]
$ServerAddress = "localhost",
[parameter(
Mandatory=$false, Position=2,ValueFromPipeline=$true
)]
$Databases
)
-
.EXAMPLE
Remove-TRISBrokenLinks -ServerAddress "localhost" -Databases "Database1"
Manually entering the server address and database
.EXAMPLE
Remove-TRISBrokenLinks -ServerAddress "localhost" -Databases "Database1", "Database2"
Runs against an array of databases names
.EXAMPLE
Get-TRISDatabases -ServerAddress "Localhost" -name | Remove-TRISBrokenLinks
Uses the Get-TRISDatabases function to pass all TRIS databases to the function
答案 0 :(得分:2)
通常,process
脚本块允许输出多个对象,就像其他任何脚本块一样。例如:
PS> 'one', 'two' | & { param([Parameter(ValueFromPipeline)] $str) process { $str; 'hi' } }
one
hi
two
hi
请记住,return <object>
只是用于输出<object>
和从脚本块返回的语法糖,并且您不需要return
来输出一个对象。
但是,鉴于您的特定要求-通过管道将另一个函数的两个参数与函数的输出绑定-您需要:
make Get-TRISDatabases
输出一个自定义对象,其属性是传递给两个参数的参数。
定义您的其他函数,以按属性名称 从管道绑定这些属性。
# Get-TRISDatabases ...
Process {
## Get Data
$rValue = Invoke-Sqlcmd2 -Query $Query_GetDatabases -ServerInstance $ServerAddress
# Output a custom object with both $rValue and the server address
[pscustomobject] @{
ServerAddress = $ServerAddress
Databases = if ($Name) { $rValue.Name } else { $rValue }
}
}
# ...
然后按如下所示定义Remove-TRISDeadLinks
param()
块(PSv3 +;请注意,默认情况下参数是非强制性的,并且其位置由其声明顺序隐含):
# Remove-TRISDeadLinks ...
[CmdletBinding()]
param (
[Parameter(ValueFromPipelineByPropertyName)]
$ServerAddress = "localhost"
,
[Parameter(ValueFromPipelineByPropertyName)]
$Databases
)