类型为oracle时的MissingDriverError：使用typeorm

Posted 2021-05-05

我在javascript中使用typeorm作为节点并表达后端，如下所示： https://typeorm.github.io/usage-with-javascript.html

节点版本v6.11.1

package.json的依赖关系：

  "@types/es6-shim": "^0.31.35",
    "@types/node": "^8.0.25",
    "async": "^2.5.0",
    "body-parser": "^1.17.2",
    "cors": "^2.8.4",
    "express": "^4.15.4",
    "oracledb": "^1.13.1",
    "reflect-metadata": "^0.1.10",
    "typeorm": "0.1.0-alpha.35"

这是我得到的错误：

Error:  { Error
        at new MissingDriverError (C:UsersshodhprojectsNAPPATracking
ode_modules	ypeormerrorMissingDriverError.js:22:23)
        at DriverFactory.create (C:UsersshodhprojectsNAPPATracking
ode_modules	ypeormdriverDriverFactory.js:40:23)
        at new Connection (C:UsersshodhprojectsNAPPATracking
ode_modules	ypeormconnectionConnection.js:81:59)
        at ConnectionManager.create (C:UsersshodhprojectsNAPPATracking
ode_modules	ypeormconnectionConnectionManager.js:56:26)
        at Object.<anonymous> (...
ode_modules	ypeormindex.js:205:70)
        at step (...
ode_modules	ypeormindex.js:32:23)
        at Object.next (...
ode_modules	ypeormindex.js:13:53)
        at ...
ode_modules	ypeormindex.js:7:71
        at __awaiter (...
ode_modules	ypeormindex.js:3:12)
        at Object.createConnection (...
ode_modules	ypeormindex.js:196:12)
      name: 'MissingDriverError',
      message: 'Wrong driver undefined given. Supported drivers are: "mysql", "postgres", "mssql", "oracle", "mariadb", "sqlite".' }

这是模型：

module.exports = {
    name: "reagentsandconditionsnames",
    columns: {
        reagentnameid: {
            primary: true,
            type: "int",
            generated: true
        },
        reagentname: {
            type: "string"
        },
        datatype: {
            type: "string"
        },
        displayordernumber: {
            type: "int"
        }
    }
};

这是我尝试访问数据库的代码：

var typeorm = require("typeorm"); // import * as typeorm from "typeorm";
const oracledb = require('oracledb');
var reagentsandconditionsnames = require("./reagentsandconditionsnames"); // import {Post} from "./model/Post";
module.exports.getAllRandC = (callback) => {
  typeorm.createConnection({
      driver: {
          type: "oracle",
          host: "localhost",
          port: 1521,
          username: "uname",
          password: "pwd",
          database: "dev"
      },
      entitySchemas: [
          reagentsandconditionsnames
      ],
      autoSchemaSync: true
  }).then(function (connection) {
      console.log(connection);
      // let rncnames = await connection.entityManager.find(reagentsandconditionsnames);
      // console.log(rncnames);
      callback(null, JSON.stringify("rncnames"));
         }).catch(function(error) {
        console.log("Error: ", error);
    });
  }

我究竟做错了什么？

答案

你做过驱动安装步骤了吗？ https://typeorm.github.io/index.html#installation

有关安装node-oracledb：https://github.com/oracle/node-oracledb/blob/master/INSTALL.md的详细信息，请参阅此处

另一答案

看起来我正在使用最新版本的typeorm（0.1.0-alpha.35），当我删除它并安装稳定版本（0.0.11）时，错误消失了！

但现在我无法以某种方式使用连接，当我这样做时，我得到以下错误

let rncnames = await connection.entityManager.find(reagentsandconditionsnames);

在连接处

let rncnames = await connection.entityManager.find(reagentsandconditionsnames);

SyntaxError: Unexpected identifier
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)

谢谢您的帮助！