Edit field except 1 or more fileds in DataSource - AX 2012

Edit field except 1 or more fileds in DataSource -

allowEditFieldsOnFormDS_W(BankChequeTable_DS, false);

    BankChequeTable_DS.object(fieldNum(BankChequeTable, chequeHandoverTo)).allowEdit(true);
    BankChequeTable_DS.object(fieldNum(BankChequeTable,ChequeHandoverDate)).allowEdit(true);