Database: ORM

An ORM to be used inside and outside StackerJS

Preparing

Entities must be configured:

// Entities/User.js


export class User
{
    
    metadata()
    {
        return {
            'table': 'users',
            'fields': [
                { 'name': 'id', 'type': 'pk' },
                { 'name': 'name', 'type': 'string', 'required': true },
                { 'name': 'active', 'type': 'boolean', 'default': true }
            ],
            'relations': []
        }
    }

}

And then Repository is declared:

// Repositories/UserRepository.js
import { User } from './../Entities/User';


export class UserRepository
{

    constructor()
    {
        this.entity = new User();
    }

}

Inserting

let user = new User();
user['name'] = 'My Name is...';

let usersRepository = new UserRepository();
usersRepository.save(user)
    .then(response => {
        if (!response)
            console.log(usersRepository.getErrors());

        return response;
    });

Querying

let usersRepository = new UserRepository();

// Fetching by ID
let user = await usersRepository.findById(1);

// Fetching one by filter as string
let user = await usersRepository.findOne("active = 1");

//Fetching many by filter as object
let user = await usersRepository.findAll({
    'active': { 'eq': true } // or 'active': [ 'eq', true ]
});

Comparisions

| Term | MySQL Term | Description | | ---- | --- | --- | | eq | = | Looks for exactly equal results | | neq | <> | Looks for exactly different | | gt | > | Looks for greater values | | gte | >= | Looks for greater or equal values | | lt | < | Looks for lower values | | lte | <= | Looks for lower or equal values | | in | IN | Looks for values inside array | | nin | NOT INT | Looks for values not inside array |