Orm

A simple, yet extensible Object-Relational Mapping (ORM) library that allows you to interact with any key-value databse like LevelDB or Redis. It provides a clean and well-structured JavaScript API for performing database operations like Create, Read, Update, Delete (CRUD), indexing, and query searches. The package extends on the @basd/encoder package and follows Object-Oriented Programming (OOP) and SOLID principles, making it easy to extend and adapt to various use cases.

Features

• Lightweight and efficient.
• Extensible architecture based on @basd/encoder.
• Dynamic index management.
• Query engine for advanced searching.
• Aggregator for optimized database interactions.

Installation

Install the package with:

npm install @plaindb/orm

Usage

First, import the Orm library.

import Orm from '@plaindb/orm'

or

const Orm = require('@plaindb/orm')

Basic Example

Here is a simple example to demonstrate CRUD operations using the ORM:

const orm = new Orm(storage, {
  User: {
    name: 'string',
    age: 'number'
  }
})

// Create
const user = await orm.create('User', {
  name: 'John Doe',
  age: 30
})

// Update
await orm.update('User', user.id, {
  age: 31
})

// Read
const fetchedUser = await orm.read('User', user.id)

// Delete
await orm.delete('User', user.id)

Advanced Example

This package allows more advanced use-cases, like list handling and relationships:

const orm = new Orm(storage, {
  User: {
    name: 'string',
    posts: '...Post'
  },
  Post: {
    content: 'string'
  }
})

const user = await orm.create('User', {
  name: 'John',
  posts: [
    { content: 'First Post' },
    { content: 'Second Post' }
  ]
})

Extending

Since the library follows OOP principles, you can easily extend it. For example, to add a new query operation:

class CustomOrmModel extends OrmModel {
  constructor(type, fields, config, codex) {
    super(type, fields, config, codex)
    // Custom logic
  }
  customFind(query) {
    // Custom find logic
  }
}

Configuration Options

The Orm constructor accepts a configuration object that includes the following options:

• classes: Define custom classes for models, fields, lists, etc.
• parseField: A function to parse field definitions.
• props: Define id, created, and updated property names.

Documentation

• API Reference

OrmModel

The OrmModel class encapsulates an entity type in the database. It allows you to perform CRUD operations, as well as indexing and searching.

Methods

• create(data): Creates a new entity.
• update(id, update): Updates an existing entity by its ID.
• delete(id): Deletes an entity by its ID.
• read(id): Fetches an entity by its ID.

Orm

The Orm class serves as a manager for different types of models and contains utility methods for global operations.

Methods

• create(type, data): Creates a new entity of a given type.
• update(type, id, update): Updates an existing entity of a given type.
• delete(type, id): Deletes an entity of a given type.
• read(type, id): Reads an entity of a given type.

Tests

In order to run the test suite, simply clone the repository and install its dependencies:

git clone https://gitlab.com/frenware/framework/plaindb/orm.git
cd orm
npm install

To run the tests:

npm test

Contributing

Thank you! Please see our contributing guidelines for details.

Donations

If you find this project useful and want to help support further development, please send us some coin. We greatly appreciate any and all contributions. Thank you!

Bitcoin (BTC):

1JUb1yNFH6wjGekRUW6Dfgyg4J4h6wKKdF

Monero (XMR):

46uV2fMZT3EWkBrGUgszJCcbqFqEvqrB4bZBJwsbx7yA8e2WBakXzJSUK8aqT4GoqERzbg4oKT2SiPeCgjzVH6VpSQ5y7KQ

License

@plaindb/orm is MIT licensed.