Angular-对此事务已调用提交

Question

我在Angular 2+中使用打字稿进行交易时遇到问题。 这是后端代码：

return new Promise(async(resolve, reject) => {
  switch (message.user.userGroupId) {
    case UserLevel.SUPERADMIN:
    case UserLevel.ADMIN_CALLCENTER:
    case UserLevel.AGENT:
    case UserLevel.ADMIN_COMMERCIAL:
      const contractData = message.body.contract;
      const opportunityID = message.params.opportunity_id;
      const opportunity = await Opportunity.findOne({
        where: {
          _id: opportunityID
        },
        include: [
          Customer,
          Province,
          {
            model: User,
            as: 'agent'
          },
          {
            model: User,
            as: 'operator'
          },
          {
            model: OpportunityLog,
            include: [User]
          },
        ],
      });
      const customer = opportunity.customer;
      const startedTransaction: Transaction = await Opportunity.sequelize.transaction();
      try {
        opportunity.set(message.body);
        await opportunity.save({
          transaction: startedTransaction
        });
        message.result = opportunity.toJSON();

        //HERE

        this.opLog.addLog(
          message.user._id,
          message.body.note,
          'ESIT',
          opportunityID, {
            transaction: startedTransaction
          });

        //HERE

        if (status == 5) {
          const contract = new Contract(contractData);
          contract.opportunityId = opportunityID;
          contract.operatorOpener = opportunity.agentId;
          contract.agentId = opportunity.agentId;
          contract.channelType = opportunity.channelType;
          contract.channelSpec = opportunity.channelSpec;
          contract.customerId = customer._id;
          contract.address = customer.address;
          contract.city = customer.city;
          contract.postcode = customer.postcode;
          contract.phone = [];
          contract.provinceId = customer.provinceId;
          contract.regionId = customer.regionId;
          if (customer.phone) {
            contract.phone.push(customer.name + " " + customer.surname + ' (FISSO): ' + customer.phone);
          }
          if (customer.mobile) {
            contract.phone.push(customer.name + " " + customer.surname + ' (MOBILE): ' + customer.mobile);
          }
          const c = await contract.save({
            transaction: startedTransaction
          });
          this.contractLog.addLog(message.user._id, c._id,
            'Contratto creato', {
              transaction: startedTransaction
            });
          message.result.contract = c;
        }
        await startedTransaction.commit();
        if (status == 2) {
          const toPass = JSON.parse(JSON.stringify(opportunity));
          toPass.customer = customer;
          this.email.sendEmail(opportunity.agent.email, message.user.email, 'Appuntamento confermato',
            this.generateHtml(toPass));
        }
        return resolve(message);

      } catch (error) {
        startedTransaction.rollback();
        console.log(error);
        message.error = {
          code: 'NA0001',
          detail: 'Error modifying',
          status: 400,
        };
        return reject(message);
      }
      break;
    default:
      message.error = {
        code: 'NA0001',
        detail: 'Permission denied.',
        status: 403,
      };
      return reject(message);
  }
});

这是oppLog类：

export class OpportunityLogService extends Injectable {
  public addLog(operatorId, note, action, opportunityId, options = {}) {
    Opportunity
      .findOne({
        where: {
          _id: opportunityId
        }
      })
      .then((opp: Opportunity) => {
        const oppLog = new OpportunityLog({
          opportunityId: opp._id,
          operatorId,
          note,
          action,
          statusId: opp.statusId,
          esitId: opp.esitId,
        });
        oppLog.save(options).then((c) => {
          console.log(c.dataValues);
        }, (err) => {

          //HERE
          console.log('errore');
          console.log(err);

          //HERE
        });
      });
  }
}

当我启动angular时，终端上会出现以下错误：

  已对此事务调用

commit（0f7dace9-da2a-417c-a32a-2be0f0085771），您将无法再使用它。 （被拒绝的查询作为此错误的'sql'属性附加）*