Question

我想连接两个数据库，因为一个数据库用于登录，而其他数据库用于获取登录用户的数据。

我创建了两个数据库连接，如下所示，但它覆盖了以前的连接

var express = require('express');
var path = require('path');
var AWS = require('aws-sdk');
var connection  = require('express-myconnection'); 

//second connection
var myConnection = require('express-myconnection');

var mysql = require('mysql');
var app = express();
var session = require('express-session');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var passport = require('passport');
var localStrategy = require('passport-local').Strategy;

app.use(
connection(mysql,{
    host: 'localhost',
    user: 'user1',
    password : 'pass1',
    port : 3306, //port mysql
    database:'database1'
},'pool') //or single
);

app.use(
myConnection(mysql,{
    host: 'localhost',
    user: 'user2',
    password : 'pass2',
    port : 3306, //port mysql
    database:'database2'
},'pool') //or single
);

Answer 1

确定！为了连接第二个数据库，我使用了包含池的mysql连接器文件并将其分配给变量＆＃34; newConnection＆＃34; ：

var express = require('express');
var path = require('path');
var AWS = require('aws-sdk');
var connection  = require('express-myconnection'); 

var mysql = require('mysql');
var app = express();
var session = require('express-session');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var passport = require('passport');
var localStrategy = require('passport-local').Strategy;

app.use(
connection(mysql,{
    host: 'localhost',
    user: 'user1',
    password : 'pass1',
    port : 3306, //port mysql
    database:'database1'
},'pool') //or single
);
    var newConnection = mysql.createPool({
    host: 'localhost',
    user: 'user2',
    password : 'pass2',
    port : 3306, 
    database:'database2'});
    app.set('connection_user',newConnection);//setting DB configuration in a variable

稍后您可以简单地将连接器包含在另一个文件中，我们可以将其称为webservice.js：

var connection_user = request.app.get('connection_user');
connection_user.getConnection(function(){});

现在使用＆＃34; connection_user＆＃34;变量我们连接到第二个数据库。希望你明白了！

与nodejs中的mysql建立两个数据库连接

1 个答案: