无法使用 sequelize 从本地 node 应用程序连接到 heroku postgresql 数据库

我正在try 使用Sequelize从本地nodejs应用程序连接到Heroku postgresql数据库.我遵循了这两个指南，heroky服务器端的一切都运行得很好，但当我在Mac上本地运行时，我的 node 应用程序无法连接到heroku.

• http://sequelizejs.com/articles/heroku
• https://devcenter.heroku.com/articles/connecting-to-heroku-postgres-databases-from-outside-of-heroku

以下是我如何启动本地应用程序:

DATABASE_URL=$(heroku config:get DATABASE_URL) nodemon

让我明白:

Sequelize: Unable to connect to the database:

但我通过这样做得到了正确的URL:

echo $(heroku config:get DATABASE_URL)

这些命令运行良好:

heroku pg:psql
psql $(heroku config:get DATABASE_URL)

以下是我的nodejs代码:

var match = process.env.DATABASE_URL.match(/postgres:\/\/([^:]+):([^@]+)@([^:]+):(\d+)\/(.+)/)
sequelize = new Sequelize(match[5], match[1], match[2], {
    dialect:  'postgres',
    protocol: 'postgres',
    port:     match[4],
    host:     match[3],
    logging: false
})

sequelize
.authenticate()
.complete(function(err) {
    if (!!err) {
        log('Sequelize: Unable to connect to the database:', err);
    } else {
        http.listen(process.env.PORT || config.server.port, function(){
            log('Web server listening on port '+process.env.PORT || config.server.port);
        });
    }
});

我试图在sequelize选项中添加native: true个，但后来我得到了:

    /Users/clement/Projets/XMM/node_modules/sequelize/lib/sequelize.js:188
      throw new Error('The dialect ' + this.getDialect() + ' is not supported.
            ^
Error: The dialect postgres is not supported. (Error: Please install postgres package manually)
    at new module.exports.Sequelize (/Users/clement/Projets/XMM/node_modules/sequelize/lib/sequelize.js:188:13)
    at Object.<anonymous> (/Users/clement/Projets/XMM/server.js:17:14)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:929:3

即使在做了以下事情之后:

npm install pg
npm install -g pg
brew install postgresql

顺便说一下，这是可行的:

var pg = require('pg');
pg.connect(process.env.DATABASE_URL+'?ssl=true', function(err, client, done) {
    if (err) return console.log(err);
    client.query('SELECT * FROM pg_catalog.pg_tables', function(err, result) {
        done();
        if(err) return console.error(err);
        console.log(result.rows);
    });
});

但我宁愿使用Sequelize.