Not able to add site columns to content type through powershell

Hi,

I am planning to create content types and site columns through script.

Some site columns format is Number and some site coumns format is of Managed Metadata

Post creating site columns,I am suppose add those all site columns to content types.

For this I had written script as below

//sitecolumns.csv

fieldname,fieldtype,columngroupname

fieldname1, Managed Metadata, stdcolumngroupname

fieldname2, Managed Metadata, stdcolumngroupname

fieldname3, Number, stdcolumngroupname

fieldname4, Number, stdcolumngroupname

// ContentTypes.csv

contenttypename,contenttypesinherits

contenttype1,Enterprise Wiki Page

contenttype2,Document

contenttype3,Image

//automationscript.ps1

Start-SPAssignment –Global

$web = get-spweb “http://abc.com”                    

foreach($ctypes in $ctypescsv)

{

$ctypeName = $ctypes.contenttypename

##$web.AvailableContentTypes | Select-Object Name

$ctypeParent = $web.availablecontenttypes[$ctypes.contenttypesinherits]

$ctype = new-object Microsoft.SharePoint.SPContentType($ctypeParent, $web.contenttypes, $ctypeName)

$ctype.Group = $ctypegroupname

$web.contenttypes.add($ctype)

foreach($scolumns in $sitecolumnscsv)

{

if(($scolumns.fieldtype -eq "Managed Metadata") -and (($ctypes.contenttypename -eq " contenttype1") -or ($ctypes.contenttypename -eq " contenttype2") -or ($ctypes.contenttypename -eq " contenttype3")))

{

#Creating Metadata column

$fieldName = $scolumns.fieldname

#Open the Site + Web

$site = Get-SPSite “http://abc.com”

$web = $site.RootWeb

#Gets a TaxonomySession object

$taxonomy = Get-SPTaxonomySession -Site “http://abc.com”

#Gets the GUID of the MMS Application

$sspId = $taxonomy.TermStores |

    Where-Object {$_.Name -eq “mmsappname”} |

    Select-Object -ExpandProperty Id |

    Select-Object -ExpandProperty Guid

#Gets the GUID of the Term Set

$termSetId = $taxonomy.TermStores.Groups |

    Where-Object {$_.Name -eq “mmsgname”} |

    Select-Object -ExpandProperty TermSets |

    Where-Object {$_.Name -eq “mmstsetname”} |

    Select-Object -ExpandProperty Id |

    Select-Object -ExpandProperty Guid

#Creates a Field

$field = $web.Fields.CreateNewField("TaxonomyFieldType",$fieldName)

$web.fields.add($field)

#Updates with Term Set + SspId

$field = $web.fields.GetField($fieldName)

##$field.TermSetId = $termSetId

$field.SspId =  $sspId

$field.Update()

$fieldLink = new-object Microsoft.SharePoint.SPFieldLink($field)

$ctype.fieldlinks.add($fieldLink)

$ctype.update()

}

elseif(($scolumns.fieldtype -eq "Number") -and (($ctypes.contenttypename -eq " contenttype1") -or ($ctypes.contenttypename -eq " contenttype2") -or ($ctypes.contenttypename -eq " contenttype3")))

{

//Add Fields to content type

$web.fields.add($scolumns.fieldname,$scolumns.fieldtype, $false)

$field = $web.fields.getfield($scolumns.fieldname)

$field.Group = $scolumns.fieldname

$fieldLink = new-object Microsoft.SharePoint.SPFieldLink($field)

$ctype.fieldlinks.add($fieldLink)

$ctype.update()

}

}

}

#-----------------------------------------------------------------------------------

Stop-SPAssignment -Global           

#---------------------------------------------------------------------------------------------------

#EndRegion

Now after executing the above script,noticed that each site columns is created for 3 times and

At certain cases i.e it is throwing message as ‘Cannot convert argument to SPFieldlinkAdd’

Please let me know if I am making any mistake.

Regards,

Sudheer 

Thanks & Regards, Sudheer