Node.js ORM框架：ORM2
项目地址：https://github.com/dresende/node-orm2
支持的数据库：
・ MySQL & MariaDB
・ PostgreSQL
・ Amazon Redshift
・ SQLite
安装
1. npm install orm
连接数据库
1. var orm = require("orm");
2.
3. orm.connect("mysql://username:password@host/database", function (err, db) {
4. //...
5. });
定义模型
1. var Person = db.define("person", {
2. name : String,
3. surname : String,
4. age : Number, // FLOAT
5. male : Boolean,
6. continent : [ "Europe", "America", "Asia", "Africa", "Australia", "Antartica" ], // ENUM type
7. photo : Buffer, // BLOB/BINARY
8. data : Object // JSON encoded
9. }, {
10. methods: {
11. fullName: function () {
12. return this.name + ' ' + this.surname;
13. }
14. },
15. validations: {
16. age: orm.enforce.ranges.number(18, undefined, "under-age")
17. }
18. });
查找
1. Person.find({ surname: "Doe" }, function (err, people) {
2. // SQL: "SELECT * FROM person WHERE surname = 'Doe'"
3.
4. console.log("People found: %d", people.length);
5. console.log("First person: %s, age %d", people[0].fullName(), people[0].age);
6.
7. people[0].age = 16;
8. people[0].save(function (err) {
9. // err.msg = "under-age";
10. });
11. });
删除和同步表
1. db.drop(function () {
2. // 删除所有表
3.
4. Person.sync(function () {
5. // 创建Person表
6. });
7. });
创建
1. var newRecord = {};
2. newRecord.id = 1;
3. newRecord.name = "John"
4. Person.create(newRecord, function(err, results) {
5. ...
6. });
更新
1. Person.find({ surname: "Doe" }, function (err, people) {
2. // SQL: "SELECT * FROM person WHERE surname = 'Doe'"
3.
4. console.log("People found: %d", people.length);
5. console.log("First person: %s, age %d", people[0].fullName(), people[0].age);
6.
7. people[0].age = 16;
8. people[0].save(function (err) {
9. // err.msg = "under-age";
10. });
11. });