NodeJS ORM

Call for testers

• please test-report configurable constraints on MySQL;

About

Node-ORM is a multi-database Object-Relational Mapping for NodeJS.

Features

• validators;
• beforeSave/afterSave hooks;

Installing

npm install orm

Connecting to a database

var orm = require("orm");
var dsn = "mysql://username:password@hostname/database";
orm.connect(dsn, function (success, db) {
if (!success) {
console.log("Could not connect to database!");
return;
}
// you can now use db variable to define models
});

Connecting to a database via raw API

var orm = require("orm");
var mysql = require("mysql");
var client = mysql.createClient({
user: 'root',
password: 'root'
});
orm.connect("mysql", client, function (success, db) {
// same as above...
});

Defining a model

var Person = db.define("person", {
"name" : { "type": "string" },
"surname": { "type": "string", "default": "" },
"age" : { "type": "int" }
}, {
"methods" : {
"fullName" :function () {
return this.name + " " + this.surname;
}
}
});

Creating a model

Person.sync();

Using a model

var John = new Person({
"name" : "John",
"surname"	: "Doe",
"age" : 20
});
console.log("Hello, my name is " + John.fullName() + " and I'm " + John.age + " years old");

Saving a model

John.save(function (err, JohnCopy) {
if (!err) {
console.log("Saved! ID=" + John.id); // you can use John or JohnCopy
} else {
console.log("Something went wrong...");
console.dir(err);
}
});

Adding associations

Person.hasOne("father", Person);
// or just
Person.hasOne("mother"); // defaults to same model
// this will create "person_friends" table with "person_id" and "friend_id"
Person.hasMany("friends", Person, "friend");

Changing associations

John.setFather(Jeremy, function () {
John.setMother(Jane, function () {
John.addFriends(Jeremy, Jane, function () {
console.log("Jeremy and Jane (John's parents) are now his friends too");
});
});
});
John.getFather(function (JohnFather) {
console.log("John's father is " + JohnFather.name);
});
John.unsetMother(function () {
console.log("John has no mother now!");
});
John.removeFriends(Jeremy, Jane, function () {
console.log("John has no friends now!");
});
// or just don't send any, all will be removed
John.removeFriends(function () {
console.log("John has no friends now!");
});

API

Check out API for more.

Supported database types

Currently supported database types are:

• MySQL (via https://github.com/felixge/node-mysql)
• PostgreSQL (via https://github.com/brianc/node-postgres)
• MongoDB (alpha quality, via https://github.com/christkv/node-mongodb-native)

Supported data types

Currently, following data types affect only .sync() method (i.e. CREATE TABLE). Others, like .save() method (i.e. UPDATE), does not perform any data type checks.

Name	Description	MySQL Type	PostgreSQL Type	MongoDB Type
string	Small text	VARCHAR(255)	VARCHAR(255)	String
text	Big text	TEXT	TEXT	String
int, integer, num, number	Signed integer	INT	INTEGER	Int
float	Floating point number	FLOAT	REAL	Float
bool, boolean	True or false value	TINYINT(1) (true=1, false=0)	BOOLEAN	Boolean
date	Date/time value (seconds precision)	DATETIME	TIMESTAMP	?
data	Binary data	BLOB	BYTEA	String
enum	Enumerated value	ENUM	ENUM	String
struct, object	Generic (and simple) object	TEXT (saved as JSON)	TEXT (saved as JSON)	Object