mysql-promised

Promised warp for felixge/node-mysql using bluebird

Install

$ npm install mysql-promised

TODO

• Add test scripts.
• Provide utils for createConnection etc.

Usage

Suppose we have this table in mysql database:

CREATE TABLE `user` (
  `id` int(10) unsigned NOT NULL,
  `username` varchar(50) NOT NULL,
  `password` varchar(40) NOT NULL,
  `email` varchar(50) DEFAULT NULL,
  `language` varchar(5) DEFAULT 'en'
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Now we create a model for table user

var Base = require('node-mysql-promised');
var mysql = require('mysql');
 
var connection = mysql.createConnection(...);
var user = new Base(connection, {
  pk: 'id',       // required
  table: 'user',  // required
  constraints: {
    username: {format: /[A-Za-z0-9\-]+/,length: {maximum: 50}},
    password: {length: {maximum: 40}},
    email: {email: true},
    language: {format: /[a-z]{2}(-[A-Z]{2})?/}
  } // see validate.js
});

Class Methods

query()

model.query(sql, params)

This method is the same as connection.query, except it returns a promise:

user.query('select * from ?', [user.table])
.then(function(rows){
  console.log(rows);
})
.catch(function(err){
  //handle error
});

You can use original node style callback as you like:

user.query('select * from ?', [user.talbe], function(err, rows) {
  //handle error
  console.log(rows);
});

search()

model.search(condition, options)

Search table by condition

user.search({username: 'king'})
.then(...);

find()

Same as search() except it will only return the first row.

model.find(condition, options)

findOne()

Find a row and returns only the field column

model.findOne(field, condition, options)

insert()

model.insert(data)

update()

model.update(condition, data, constraints)

replace()

Update a row when it exists and insert a row when it does not.

replace(data, constraints)

remove()

Remove a row (rows);

model.remove(condition)

delete()

Alias to remove()

Query Conditions

In method such as search(), update(), delete(), condition param can be:

An object which key-value pairs are translate into SQL condition

{username:'user1',password:'123456'}

==>

WHERE `username` = 'user1' AND `password` = '123456'

Or an array which sub-array are translate into SQL condition

[
  ['username', ['LIKE', 'super%']],
  ['username', ['LIKE', 'spider', 'OR']]
]

==>

WHERE `username` LIKE 'super%' OR `username` LIKE '%spider%'

Or just single string or int which indicates it is primary key

12

==>

WHERE `id` = 12

Query Options

A string or object provides additional options for query.

When this option is a string, it will directly added to SQL.

{
  orderBy: '`add_time` DESC'
  limit: 10,
  start: 50
}

==>

ORDER BY `add_time` DESC LIMIT 50, 10