[英]Sequelize Migration server connect with two databases
我已經創建了一個sequalize遷移服務器,並通過參考此文檔使用Sequelize CLI與mysql數據庫連接。 現在我想知道,是否可以使用相同的遷移服務器在另一個mysql數據庫上運行遷移,還是我需要創建另一個遷移服務器才能在另一個數據庫上運行遷移?提前謝謝您。
config.js
{
"development": {
"username": "root",
"password": null,
"database": "xxxx",
"host": "127.0.0.1",
"dialect": "mysql"
},
"test": {
"username": "root",
"password": null,
"database": "yyy",
"host": "127.0.0.1",
"dialect": "mysql"
},
"production": {
"username": "root",
"password": null,
"database": "zzz",
"host": "127.0.0.1",
"dialect": "mysql"
}
}
車型/ index.js
'use strict';
var fs = require('fs');
var path = require('path');
var Sequelize = require('sequelize');
var basename = path.basename(__filename);
var env = process.env.NODE_ENV || 'development';
var config = require(__dirname + '/..\config\config.json')[env];
var db = {};
if (config.use_env_variable) {
var sequelize = new Sequelize(process.env[config.use_env_variable], config);
} else {
var sequelize = new Sequelize(config.database, config.username, config.password, config);
}
fs
.readdirSync(__dirname)
.filter(file => {
return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
})
.forEach(file => {
var model = sequelize['import'](path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(modelName => {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
遷移/ create_user.js
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('Users', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
firstName: {
type: Sequelize.STRING
},
lastName: {
type: Sequelize.STRING
},
email: {
type: Sequelize.STRING
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Users');
}
};
以此更改您的config.js文件。
const DB_DETAILS = {
"development" : {
"pg_db_host" : "127.0.0.1",
"pg_db_name" : "zzz",
"pg_db_username" : "root",
"pg_db_passoword" : "",
"pg_db_dialect" : "mysql",
"db_host" : "127.0.0.1",
"db_name" : "xxx",
"db_username" : "root",
"db_passoword" : "",
"db_dialect" : "mysql",
"multipleStatements": true
},
"local" : {
"pg_db_host" : "localhost",
"pg_db_name" : "collaboration",
"pg_db_username" : "postgres",
"pg_db_passoword" : "postgres",
"pg_db_dialect" : "postgres",
"db_host" : "localhost",
"db_name" : "colloboration",
"db_username" : "colloboration",
"db_passoword" : "s6K2q2W509gx",
"db_dialect" : "postgres",
"multipleStatements": true
},
"production" : {
"pg_db_host" : "localhost",
"pg_db_name" : "collaboration",
"pg_db_username" : "postgres",
"pg_db_passoword" : "postgres",
"pg_db_dialect" : "postgres",
"db_host" : "localhost",
"db_name" : "colloboration",
"db_username" : "colloboration",
"db_passoword" : "s6K2q2W509gx",
"db_dialect" : "postgres",
"multipleStatements": true
}
}
const env_db = DB_DETAILS[process.env.NODE_ENV];
const sequelize = new Sequelize(env_db.pg_db_name, env_db.pg_db_username, env_db.pg_db_passoword, {
host: env_db.pg_db_host,
dialect: env_db.pg_db_dialect,
pool: {
max: 5,
min: 0,
idle: 10000
}
});
const sequelize1 = new Sequelize(env_db.db_name, env_db.db_username, env_db.db_passoword, {
host: env_db.db_host,
dialect: env_db.db_dialect,
pool: {
max: 5,
min: 0,
idle: 10000
}
});
sequelize.authenticate().then(() => {
console.log('Connection has been established successfully.');
})
.catch(err => {
console.error('Unable to connect to the database:', err);
});
sequelize1.authenticate().then(() => {
console.log('Connection has been established successfully.');
})
.catch(err => {
console.error('Unable to connect to the database:', err);
});
module.exports = { Sequelize , sequelize };
module.exports = { Sequelize1 , sequelize1 };
還要用global.db = require('./ config.js')替換var db = {} 。 // index.js文件中的配置文件路徑。
不,您可以相應地使用db.sequelize和db.sequelize1
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