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example.js
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example.js
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/**
* This file contain examples to use this ORM.
* If you want to run this examples on your localhost execute this commands:
* 1. git clone git@github.com:gyk088/pgObject.git
* 2. cd pgObject/
* 3. docker-compose up -d
* 4. npm install
* 5. node example.js
*/
const { Client } = require('pg');
var mysql = require('mysql2');
const PgObject = require('./PgObject');
(async function run () {
await postgreSqlExample();
await mySqlExample();
process.exit(1);
})();
class Admin extends PgObject {
static get schema() {
return {
id: {
pk: true,
},
name: {
default: 'TEST NAME',
},
surname: {},
ctime: {
default: new Date(),
},
fullName: {
computed: true,
get (val, target, name) {
return `${target['name']} ${target['surname']}`;
},
set (val, target, name) {
console.log("you cannot define this field")
return target[name];
}
},
}
}
static get table() {
return 'exapmleAdmin';
}
static get notValidateSchema() { return true }
}
// Example for PostgreSQL
async function postgreSqlExample () {
// Config
const client = new Client({
user: 'pgobject',
database: 'pgobject',
password: 'pgobject',
host: '127.0.0.1',
port: '5432',
});
await client.connect();
PgObject.setClient(client);
PgObject.setLog(true);
await PgObject.query(`
BEGIN;
DROP TABLE IF EXISTS exapmleAdmin;
CREATE TABLE exapmleAdmin (
id SERIAL,
name VARCHAR(40),
surname VARCHAR(40),
ctime timestamp(6) with time zone,
PRIMARY KEY (id)
);
COMMIT;`
);
// Create a new Object in the Database
const admin1 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin1.save(); // or admin2.insert();
const admin2 = new Admin();
admin2.f.surname = 'TestSurname1'
await admin2.insert(); // or admin2.save();
// Update object
const admins1 = await Admin.select("WHERE name = $1 LIMIT 1", ['TestName1']);
admins1[0].f.name = 'newValue1';
await admins1[0].save() // or admins1[0].update();
const admins2 = await Admin.select("WHERE name = $1 LIMIT 1", ['TEST NAME']);
admins2[0].f.name = 'newValue2';
await admins2[0].update() // or admins2[0].save();
// SELECT
const admins3 = await Admin.select("WHERE name = $1 LIMIT 1", ['TEST NAME']);
// Query
const admins4 = await PgObject.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME'], Admin);
const admins5 = await Admin.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME'], Admin);
const data1 = await Admin.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME']);
const data2 = await PgObject.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME']);
// Transaction
await PgObject.startTransaction();
const admin3 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin3.save();
await PgObject.commit();
await PgObject.startTransaction(PgObject.mode.repeatableRead);
const admin4 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin4.save();
await PgObject.rollback();
PgObject.createTransaction(async () => {
const admin1 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin1.save();
})
PgObject.createTransaction(async () => {
const admin = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin.save();
}, PgObject.mode.serializable);
// // DELETE
const admins6 = await Admin.select();
for (const adm of admins6) {
await adm.delete();
}
// Close connection
await client.end();
}
// Example for MySql
async function mySqlExample () {
// Config
var client = mysql.createConnection({
user: 'pgobject',
password: 'pgobject',
database: 'pgobject',
});
PgObject.setClient(client, 'mysql');
PgObject.setLog(true);
await PgObject.query(`BEGIN`);
await PgObject.query(`DROP TABLE IF EXISTS exapmleAdmin`);
await PgObject.query(`CREATE TABLE exapmleAdmin (
id INT AUTO_INCREMENT,
name VARCHAR(40),
surname VARCHAR(40),
ctime DATETIME,
PRIMARY KEY (id)
)`);
await PgObject.query(`COMMIT`);
// Create a new Object in the Database
const admin1 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin1.save(); // or admin2.insert();
const admin2 = new Admin();
admin2.f.surname = 'TestSurname1'
await admin2.insert(); // or admin2.save();
// Update object
const admins1 = await Admin.select("WHERE name = $1 LIMIT 1", ['TestName1']);
admins1[0].f.name = 'newValue1';
await admins1[0].save() // or admins1[0].update();
const admins2 = await Admin.select("WHERE name = $1 LIMIT 1", ['TEST NAME']);
admins2[0].f.name = 'newValue2';
await admins2[0].update() // or admins2[0].save();
// SELECT
const admins3 = await Admin.select("WHERE name = $1 LIMIT 1", ['TEST NAME']);
// Query
const admins4 = await PgObject.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME'], Admin);
const admins5 = await Admin.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME'], Admin);
const data1 = await Admin.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME']);
const data2 = await PgObject.query("SELECT * FROM exapmleAdmin WHERE name = $1 LIMIT 1", ['TEST NAME']);
// Transaction
PgObject.createTransaction(async () => {
const admin1 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin1.save();
})
PgObject.createTransaction(async () => {
const admin = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin.save();
}, PgObject.mode.serializable);
await PgObject.startTransaction();
const admin3 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin3.save();
await PgObject.commit();
await PgObject.startTransaction(PgObject.mode.repeatableRead);
const admin4 = new Admin({
name: 'TestName1',
surname: 'TestSurname1'
});
await admin4.save();
await PgObject.rollback();
// DELETE
const admins6 = await Admin.select();
for (const adm of admins6) {
await adm.delete();
}
// Close connection
await client.end();
}