Get the term set name that is being used in sharepoint sites - powershell

Question

I have been tasked to get the MMS term sets that are being used based on terms(not with null value of MMS column in the list's items ) in all the sites so that only those MMS terms sets can get migrated to the other sharepoint environment. On a base level I'm using below script
$FieldCollection= (Get-SPWeb https:/sharepoint.com/sites/pssl/mgmt).Lists.Fields
$MetadataField = New-Object psobject
$MetadataField | Add-Member -MemberType NoteProperty -Name "ParentListUrl" -value ""
$MetadataField | Add-Member -MemberType NoteProperty -Name "ParentListTitle" -value ""
$MetadataField | Add-Member -MemberType NoteProperty -Name "FieldTitle" -value ""
$MetadataField | Add-Member -MemberType NoteProperty -Name "FieldId" -value ""
$matches = #();
foreach($field in $FieldCollection)
{
if($field.GetType().Name -ne "TaxonomyField"){
continue;
}
#if($field.TermSetId.ToString() -ne $TermSet.Id.ToString()){continue;}
$tf = $MetadataField | Select-Object *;
$tf.ParentListUrl = $field.ParentList.ParentWeb.Url;
$tf.ParentListTitle = $field.ParentList.Title;
$tf.FieldTitle = $field.Title;
$tf.FieldId = $field.ID;
$matches += $tf;
}
return $matches;
but it returns only managed metadata columns defined in the list, but not they are being used in the list. Can anybody help me to achieve the task.

Answer 1

I'm not an expert in Sharepoint API, but I'm trying to understand what the problem is to help you and I can't.
I notice that you create an object $MetadataField before a loop, then kind of create a replica $MetadataField | Select-Object * and then add in a array.
As you say, the returned objects should only have the columns of ParentListUrl,ParentListTitle,FieldTitle and FieldId which is what I expect from the sample above. Can you elaborate more on what you are looking for? Maybe update the entire function into your question and post your returned expectation. this way I can try to help you out.
Btw, the ; is not required and you should create a new instance of the object within the loop. You can use the same method or first create a hash key that drives the properties of a custom object. For example in your loop adjust the following.
$hash=#{
Property1="Value1"
Property2="Value2"
}
New-Object -Type PSObject -Property $hash
Also if you function returns directly each found item without extra processing, then you can skip adding them in an array and just write in the output like I do in my example. To make it more clear, if I would put a loop around my example in a function and execute, then I would get a recordset with custom object with Property1 and Property2