human
Solve the following python programming problem given the following code:
def _get_model_for_stock_transaction(report, transaction_helper, ledger_db) : 
    assert (report.type in const.VALID_REPORT_TYPES) 
    txn = StockTransaction (report = report, case_id = transaction_helper.case_id, section_id = transaction_helper.section_id, product_id = report.product_id, type = transaction_helper.action, subtype = transaction_helper.subaction) 
    def lazy_original_balance() : 
        return ledger_db.get_current_balance (_stock_transaction_to_unique_ledger_reference (txn)) 
new_ledger_values = compute_ledger_values (lazy_original_balance, report.type, transaction_helper.relative_quantity) 
    txn.stock_on_hand = new_ledger_values.balance 
    txn.quantity = new_ledger_values.delta 
    if report.domain : 
        txn.domain = report.domain 
ledger_db.set_current_balance (_stock_transaction_to_unique_ledger_reference (txn), txn.stock_on_hand) 
    return txn 

    
    

    Fix the buggy line: txn = StockTransaction (report = report, case_id = transaction_helper.case_id, section_id = transaction_helper.section_id, product_id = report.product_id, type = transaction_helper.action, subtype = transaction_helper.subaction)
assistant
#Here is Python code to fix the buggy line: txn = StockTransaction (report = report, case_id = transaction_helper.

txn = StockTransaction (report = report, case_id = transaction_helper.case_id, section_id = transaction_helper.section_id, product_id = transaction_helper.product_id, type = transaction_helper.action, subtype = transaction_helper.subaction)