Check the type of column using powershell within a splist

Question

hi,
i have a column called BU in my splist in many site collections.i had created using with lookup datatype and  now  since my design is changed i  want to create this as  a a choice field with few default values. Can anyone please
help how to check this using powershell? i mean check the  datatype of  column using PS and  if its lookup then need to delete the list and recreate it with choice field. i know hot to create a splist with choice field using PS,
but  i am unable to get the code for existence of lookup or choice field.
$web = Get-SPWeb "http://sitename"
$fieldnamebu= "BU"
$mysplist = $web.lists["mysplist1"]
$lookupfieldA="Lookup"
foreach($sfield in $mysplist.fields)
# how to check the datatype pf column as lookup
if ( ##todo#### -eq $lookupfieldA )
$mysplist.Delete();
$web.upate();
create the splist with choice field$spTemplate = $web.ListTemplates["Custom List"] #Create SPTemplate instance of Type Custom List
$web.Lists.Add("mysplist1", "for approvers", $spTemplate)   #Add list to site$spList = $spWeb.Lists["mysplist1"]    #Get list instance
$spList.OnQuickLaunch = $True   $spList.Update()    #Update list to reflect changes in site
$spFieldType = [Microsoft.SharePoint.SPFieldType]::Text      #Get Field type to create
$spList.Fields.Add("Mymn", $spFieldType, $false)      #Add new field to list}

Answer 1

HI,
To get the field types please refer below link...
foreach ($field in $list.Fields) #Get all fields in lists
if($spField -eq $field.Title) #if field in lists equals field in views
Write-Host $spField " | " $field.Type -ForegroundColor Green #Write out each field (column)
https://gallery.technet.microsoft.com/office/SharePoint-Get-SPFields-49039dc0
To Create Choice field follow below reference:
https://social.msdn.microsoft.com/Forums/en-US/8a874677-91cf-41dd-a601-f0dd7fdce213/creating-a-choice-column-via-powershell
http://adicodes.com/add-fields-to-list-with-powershell-in-sharepoint-2010/
Don't
forget to mark it as an Answer if it resolves your issue and Vote Me as helpful if it useful.
Mahesh