TypeScript

Question

我对 TS 比较陌生，在 new MongoStore() 参数中遇到了类型问题。通常我可以通过在 JS 中写入 db: database 作为参数来重用 Native MongoDB 连接，但是 TS 显示以下错误：

Argument of type '{ db: Db; }' is not assignable to parameter of type 'MongoUrlOptions | MogooseConnectionOptions | NativeMongoOptions | NativeMongoPromiseOptions'. Type '{ db: Db; }' is not assignable to type 'NativeMongoPromiseOptions'. Property 'dbPromise' is missing in type '{ db: Db; }'.

我试过写 new MongoStore({ db: database } as NativeMongoOptions)，但这也无济于事。

[更新] 添加 as NativeMongoOptions 会产生差异错误：

Type '{ db: Db; }' is not assignable to type 'NativeMongoOptions'. Types of property 'db' are incompatible. Type 'import("/node_modules/@types/mongodb/index").Db' is not assignable to type 'import("/node_modules/@types/connect-mongo/node_modul...'. Property 'authenticate' is missing in type 'Db'.

这是我的代码问题还是 TS 类型问题？

下面是我的代码片段。

const MongoStore: connectMongo.MongoStoreFactory = connectMongo(session);
const app: express.Application = express();

enableMiddleware(app);

(async () => {
    try {
        const client: mongodb.MongoClient = await mongodb.MongoClient.connect(config.dbUrl, { useNewUrlParser: true });
        console.log("Connected correctly to server");
        const database: mongodb.Db = client.db(config.dbName);

        app.use(session({
            resave: false,
            saveUninitialized: false,
            secret: "secret123",
            store: new MongoStore({
                db: database,
            }),
        }));

        app.use(router(database));
    } catch (error) {
        console.log("Error connecting to MongoDB", error);
    }
})();

Answer 1

发现问题了，一直都是TS打字，@types/connect-mongo用的是旧版本的@types/mongodb ^2，我在我的项目中使用 @types/mongodb ^3。

当前方案，更新@types/connect-mongo包依赖到最新（覆盖@types/mongodb^ 2 到 ^3).

Answer 2

您需要在 package.json

内的 devDependencies 中添加以下行

"@types/mongodb": "^3"

TypeScript - “{}”类型的参数不可分配给“{}”类型的参数 - MongoStore

TypeScript - Argument of type '{}' is not assignable to parameter of type '{}' - MongoStore

mongodb

node.js

connect-mongo

typescript-typings