Assuming that your view compositions are correct, the code below should give you some ideas.  You'll have to adapt it to your language but the function calls below show you how to look for an existing optional field record and create it if required. 

DetailOptFld is the view, aOptField is the optional field code, and aValue is the value to assign to the optional field.  In my code it is a variant data type which is why I use the fancy VALINDEX field value to figure out which field to assign the value to.

    With DetailOptFld
        .RecordClear
        .Fields("OPTFIELD").PutWithoutVerification aOptField

        If Not (.Read) Then
            .RecordCreate VIEW_RECORD_CREATE_DELAYKEY
            .Fields("OPTFIELD").value = aOptField
            .Fields("SWSET").value = "1"
        End If

        .Fields.FieldByID(.Fields("VALINDEX").value) = aValue

        If .Exists Then
            .Update
        Else
            .Insert
        End If

    End With

Assuming that your view compositions are correct, the code below should give you some ideas.  You'll have to adapt it to your language but the function calls below show you how to look for an existing optional field record and create it if required. 

DetailOptFld is the view, aOptField is the optional field code, and aValue is the value to assign to the optional field.  In my code it is a variant data type which is why I use the fancy VALINDEX field value to figure out which field to assign the value to.

    With DetailOptFld
        .RecordClear
        .Fields("OPTFIELD").PutWithoutVerification aOptField

        If Not (.Read) Then
            .RecordCreate VIEW_RECORD_CREATE_DELAYKEY
            .Fields("OPTFIELD").value = aOptField
            .Fields("SWSET").value = "1"
        End If

        .Fields.FieldByID(.Fields("VALINDEX").value) = aValue

        If .Exists Then
            .Update
        Else
            .Insert
        End If

    End With

thank you django

Nice. I didn't know that about VALINDEX. So once you have told the view which optional field you are dealing with, you try a read and if it is false, you do the record create, then set the field and the SWSET values, then query which field needs to be populated on the view for that optional field and set its value accordingly, then insert or update. I like that.