Springboot findBY не работает при возврате списка

Question

У меня есть конечная точка, которая сохраняет транзакции пользователя, так что я могу рассчитать комиссию пользователя в конце месяца.Сохранение транзакций работает нормально, однако возврат списка транзакций не работает.Возвращает пустой список всегда, даже если есть данные.Я пробовал разные решения, но тот же результат, что я мог упустить.Я использую базу данных MySQL для сохранения своих данных.Это мой код:

Объект:

@Entity
@Table(name = "commission", uniqueConstraints = {
            @UniqueConstraint(columnNames = "transactionsReference")
        }
)
public class commission implements Serializable{

    @Id @GeneratedValue(strategy=GenerationType.IDENTITY)
    private int transactionId;
    private String customerIdentification;
    private String transactionsReference;
    private double commission;
    private double transactionAmount;
    private String transactionType;
    private String commissionClass;
    private String commissionName;
    private String transactionDate;

    public commission() {
    }

    public commission(String customerID, String transactionsReference, double commission, double transactionAmount, String transactionType, String commissionClass, String commissionName, String transactionDate) {
        this.customerIdentification = customerID;
        this.transactionsReference = transactionsReference;
        this.commission = commission;
        this.transactionAmount = transactionAmount;
        this.transactionType = transactionType;
        this.commissionClass = commissionClass;
        this.commissionName = commissionName;
        this.transactionDate = transactionDate;
    }

  // Getters and setters omitted for brevity  

}

Репозиторий:

public interface CommissionRepository extends CrudRepository<commission, Integer> {    

 public List<commission> findByCustomerIdentification(String customerId);
    public List<commission> findByCommissionClass(String comclass);
    public commission findByTransactionsReference(String ref); 

}

Сервис:

@Service
@Transactional
public class CommisionService {

    @Autowired
    private CommissionRepository commission_repository;

    public List<commission> getAllCommissions(String customerid) {
        List<commission> userCommissions = commission_repository.findByCustomerIdentification(customerid);
        if (userCommissions == null) {
            throw new ResourceNotFoundException("Empty", "Missing Data Exception");
        }
        return userCommissions;
    }

}

Класс контроллера:

@RestController
@Api(value = "TransactionsAPI", produces = MediaType.APPLICATION_JSON_VALUE)
public class CommissionsController {

    @Autowired
    private CommisionService transactionsService;

    @RequestMapping(method = RequestMethod.POST, value = "/myendpoint/endpoint/getAll/customer/commissions/byCustomerID")
    @ApiOperation("Get all customer commissions")
    @ApiResponses(value = {
    @ApiResponse(code = 200, message = "OK", response = TransactionResponse.class)})
    public List<commission> getAllCollectionPoints(@Valid @RequestBody String cusid) {
        return transactionsService.getAllCommissions(cusid);
    }
}

Сущность:

@Entity
@Table(name = "commission", uniqueConstraints = {
            @UniqueConstraint(columnNames = "transactionsReference")
        }
)
public class commission implements Serializable{

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int transactionId;
    private String customerId;
    private String transactionsReference;
    private String commissionClass;

    public commission() {
    }

    public commission(String customerId, String transactionsReference, String commissionClass) {
        this.customerId = customerId;
        this.transactionsReference = transactionsReference;
        this.commissionClass = commissionClass;
    }

    public int getTransactionId() {
        return transactionId;
    }

    public void setTransactionId(int transactionId) {
        this.transactionId = transactionId;
    }

    public String getCustomerId() {
        return customerId;
    }

    public void setCustomerId(String customerId) {
        this.customerId = customerId;
    }

    public String getTransactionsReference() {
        return transactionsReference;
    }

    public void setTransactionsReference(String transactionsReference) {
        this.transactionsReference = transactionsReference;
    }

    public String getCommissionClass() {
        return commissionClass;
    }

    public void setCommissionClass(String commissionClass) {
        this.commissionClass = commissionClass;
    }


}