node.js - nodejs : Access variables in routes

Question

这是我的 routes.js 的样子:

module.exports = function (server, db) {

    // Deals
    const deals = require('./controllers/deals');
    server.get('/deals', deals.findAll);
    server.get('/deals/:id', deals.findById);
    server.post('/deals', deals.add);
    server.put('/deals/:id', deals.update);
    server.del('/deals/:id', deals.delete);

}

如您所见，这里有 server 和 db 变量。但是，我不确定如何将这两个变量传递给 deals.findAll 和其他 REST 方法。

以下是 deals.findAll 方法的外观:

const findAll = (req, res, next) => {
   // I need to access db here, so I can use Sequelize.
}

exports.findAll = findAll

我需要 db 的原因是 Sequelize ORM。

Answer 1

您可以使用 Function.prototype.bind() 来执行此操作:

module.exports = function (server, db) {

    // Deals
    const deals = require('./controllers/deals');
    server.get('/deals', deals.findAll.bind(null, server, db));
    server.get('/deals/:id', deals.findById.bind(null, server, db));
    server.post('/deals', deals.add.bind(null, server, db));
    server.put('/deals/:id', deals.update.bind(null, server, db));
    server.del('/deals/:id', deals.delete.bind(null, server, db));
}

Function.prototype.bind() 方法将这些参数放在前面，因此您需要将这些函数的参数修改为:

const findAll = (server, db, req, res, next) => {
   // server & db is set here
}