的NodeJS：在路由訪問變量

Question

這裏是我的routes.js看起來像：

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); 

} 

正如你所看到的，這裏有server和db變量。但是，我不確定如何將這兩個變量傳遞給deals.findAll以及其他REST方法。

這裏是deals.findAll方法的樣子：

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

exports.findAll = findAll 

的原因，我需要db是Sequelize ORM。

Answer 1

您可以使用Function.prototype.bind()做到這一點：

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)); 
} 

的Function.prototype.bind()方法預規劃這些參數，所以你需要修改這些函數的參數：

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