我正在尝试使用node-mysql
找到一些编写MySQL模型的好方法。
这是我到目前为止所拥有的:
var client = app.settings.client; // Client is set in Express settings
var table = 'users';
var User = function() {
}
// Create the user with data from Facebook
User.prototype.createFromFacebook = function (name, first_name, last_name, email, location, gender, facebookId, facebookToken, callback) {
client.query(
'INSERT INTO ' + table +
' SET name = ?, first_name = ?, last_name = ?, email = ?, location = ?,' +
' gender = ?, facebook_id = ?, facebook_token = ?',
[ name, first_name, last_name, email, location, gender, facebookId, facebookToken ],
function selectCb(err, results, fields) {
if(err) {
callback(err);
} else {
callback(null, results);
}
}
);
}
// Get user with just their email address
User.prototype.getByEmail = function (email, callback) {
client.query(
'SELECT * FROM ' + table +
' WHERE email = ?',
[ email ],
function selectCb(err, results, fields) {
if(err) {
callback(err);
} else {
callback(null, results);
}
}
);
}
module.exports = User;
对此的任何批评或改进都会很棒。谢谢!
你的方式看起来很好。
确保当您收到错误时返回:
if (err) {
return callback(err)
}
或者只是像你一样使用其他人。
仅仅为了批评,这就是我所做的:
var db = require(__dirname + '/myDatabaseInstance.js');
var create = function (vals, next) {
db.query('Insert INTO users SET ?', vals, next);
};
var load = function (selector, next) {
db.query('SELECT * FROM users WHERE ?', selector, function (err, vals) {
if(err) {
return next(err);
}
//at this point you could return a user object
//next(new User(vals[0]));
//or just return the array.
next(null, vals);
});
};
module.exports = create;
module.exports = load;
我这样称呼它
var User = require(__dirname + '/user.js');
User.load({'id' : 1}, function (err, vals) {
if (err) throw err;
console.log(vals);
});
我个人的偏好是不为我的模型使用实例。我发现当我有关系时,它开始变得混乱。
例如,假设您有一个博客,其帖子存储在与用户相关的单独表格中。很容易让User对象有一个帖子数组。现在,如果更改此posts数组,则必须记住将更改后的用户保存到数据库中。我一直在忘记,所以我只是停止使用实例。
Create model name abc.js with following code:
var mysqlModel = require('mysql-model');
var MyAppModel = mysqlModel.createConnection({
host: 'localhost',
user: 'ghgh',
password: 'gfhgfh',
database: 'gfhgh',
});
movie = new MyAppModel({tableName: "users"});
Now use this as following :
var abc = require(__dirname+'/routes/abc')
movie.find('id','all', function(err, rows) {
//console.log(rows)
})
movie.query("SELECT * from users", function(err, rows) {
});
var value ={'name': "value3"};
movie.save(value);