How to checkout file using PowerShell REST API in SharePoint Server 2013 located in subsite?

Question

I'm trying to check out file which is located inside document library under sub site.

Site URL : mymainsite/subsite/subsite/My Library/test.xlsx

I'm using below PowerShell script

function CheckOutFile($filePath) {
    Write-Host "CheckOut file is in process"


    $response = PostRequest ("/_api/web/getFileByServerRelativeUrl('/My Library/test.xlsx')/CheckOut()") (ConvertTo-Json @{ 
        __metadata = @{ type= "SPFile" }
        ServerRelativeUrl = "/My Library/test.xlsx"
    })
}

Note: If I'm trying to checkout in root site library then it is working fine when I'm referring to subsite library it showing below error.

What I'm doing wrong here :(

Answer 1

To refer library under subsite we need to specify relative url two times like below:

function CheckOutFile($filePath) {
    Write-Host "CheckOut file is in process"


    $response = PostRequest ("/_api/web/getFileByServerRelativeUrl('/subsite/subsite/My Library/test.xlsx')/CheckOut()") (ConvertTo-Json @{ 
        __metadata = @{ type= "SPFile" }
        ServerRelativeUrl = "/My Library/test.xlsx"
    })
}