无法使用Sequelize从本地节点应用程序连接到Heroku Postgresql数据库 [英] Can't connect to heroku postgresql database from local node app with sequelize

问题描述

我正在尝试使用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，在Heroky服务器端一切正常，但是当我在Mac上本地运行时，我的节点应用程序将无法连接到heroku.

I'm trying to connect to a Heroku postgresql database from a local nodejs app with Sequelize. I followed this two guides an everything is working perfectly fine on the heroky server side, but my node app won't connect to heroku when I run it locally on my Mac.

• http://sequelizejs.com/articles/heroku
• https://devcenter.heroku.com/articles/从heroku的外部连接到heroku-postgres-databases

这是我启动本地应用程序的方式:

Here is how I start the local app:

DATABASE_URL=$(heroku config:get DATABASE_URL) nodemon

得到我:

Sequelize: Unable to connect to the database:

但是我通过执行以下操作获得了正确的URL:

But I get the correct URL by doing this:

echo $(heroku config:get DATABASE_URL)

这些命令运行正常:

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

这是我的nodejs代码:

Here is my nodejs code :

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);
        });
    }
});

我尝试将 native:true 添加到sequelize选项中，但是随后我得到了:

I tried to add native: true to the sequelize options, but then I get:

    /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

即使这样做:

npm install pg
npm install -g pg
brew install postgresql

这正在起作用:

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);
    });
});

但是我宁愿使用Sequelize.

But i'd rather use Sequelize.

推荐答案

好，通过浏览sequelize源代码找到了答案: https://github.com/sequelize/sequelize/blob/master/lib/dialects/postgres/connection-manager.js#L39

OK, found the answer by browsing sequelize source code : https://github.com/sequelize/sequelize/blob/master/lib/dialects/postgres/connection-manager.js#L39

要为PG连接激活SSL，您不需要 native:true 或 ssl:true ，但是 dialectOptions.ssl:true 以下的方法终于奏效了:

To activate SSL for PG connections you don't need native: true or ssl: true but dialectOptions.ssl: true so the following did finally work:

sequelize = new Sequelize(process.env.DATABASE_URL, {
    dialect: 'postgres',
    protocol: 'postgres',
    dialectOptions: {
        ssl: true
    }
});

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