add existing content type to document library

Question

I get error message when I click on "Add from existing site content types" I want to add existing content type to this document library. Is there any powershell script for the same. Content type is already added in site but when i edit document properties it does not show 1 content type.

My document library name is "ABC" Content type name is "XYZ"

Answer 1

Following PS script should help:

#Get site object and specify name of the library to look for in each site
$site = Get-SPSite http://portal
$lookForList = "ABC"

#Walk through each site and change content types on the list specified
$siteA = $site.OpenWeb("http://portal/sites/A")

    write-host "Checking site:" $siteA.Title

    #Make sure content types are allowed on the list specified
    $docLibrary = $siteA.Lists[$lookForList]

    if ($docLibrary -ne $null)
    {
        $docLibrary.ContentTypesEnabled = $true
        $docLibrary.Update()

        #Add site content types to the list
        $ctToAdd = $siteA.ContentTypes["XYZ"]
        $ct = $docLibrary.ContentTypes.Add($ctToAdd)
        write-host "Content type" $ct.Name "added to list" $docLibrary.Title
        $docLibrary.Update()
    }
    else
    {
        write-host "The list" $lookForList "does not exist in site" $siteA.Title
    }


#Dispose of the site object
$site.Dispose()

But you should check the error you get when you navigate to Add from existing content type.. Get the correlation and check the exact error in ULS logs

Answer 2

Running Powershell and accessing a Subsite (and not the root web) you have to make a slightly different approach. You need to access the root web content type, and add that one to the subsite document library

$SPSite = Get-SPSite "http://portal"
$lookForList = "Shared Documents"

if ($SPSite -ne $null)
{
    foreach ($SPWeb in $SPSite.AllWebs)
    {
        $docLibrary = $SPWeb.Lists[$lookForList]
        $ctInRootWeb = $SPSite.RootWeb.ContentTypes["Company Document"]

        if($docLibrary.ContentTypes["Company Document"].Name -eq "Company Document")
        {
            Write-Host "   CT exist" -ForegroundColor Yellow
        }
        else
        {
            $ct = $docLibrary.ContentTypes.Add($ctInRootWeb)
            $docLibrary.Update()
            Write-Host "   CT Added" -ForegroundColor Green
        }

        if ($SPWeb -ne $null)
        {
            $SPWeb.Dispose()
        }
    }
}

if ($SPSite -ne $null)
{
    $SPSite.Dispose()
}

Answer 3

You need to visit the http://{sitename}/_layouts/mngfield.aspx

{sitename}- yoursitename to see if there are any duplicate fields are there.and delete accordingly . This site should help you for a detailed step Link