README

RESTORM

A REST ORM library for persisting data via an HTTP REST API. Inspired by Doctrine, RESTORM provides an entity manager to take care of persisting and loading your entities to and from a REST API.

Feature Overview

💾 Load and save entities from a RESTful API
👥 Manage data from multiple APIs
🔃 Manage unidirectional and bidirectional relationships between entities
💤 Effortlessly lazy load associated entities
🎈 Automated calls to paginated entities in loops
📝 Scalar, objects, and embedded entity types

Documentation Contents

Installation
Quick Start
Basic Usage
Internals
1. "Find" Workflow
2. "Persist" Workflow
References
1. Configuration Reference

Installation

To install RESTORM, run the following composer command:

composer install thesalegroup/restorm

If you haven't already done so, add the file autoloader from composer to your project code:

require __DIR__ . '/../vendor/autoload.php';

Quick Start

The example below can be used for reference for setting up a new project with RESTORM. For more information read through the rest of this guide which will link you to more documentation and references.

<?php

// Use the composer autoloader to load in RESTORM
require __DIR__ . '/../vendor/autoload.php';

use TheSaleGroup\Restorm\Configuration\Configuration;
use TheSaleGroup\Restorm\EntityManager;
use App\Entity\Post;

// Create a new Configuration instance based on our configuration
$configPath = '../config/restorm.yml';
$configuration = Configuration::buildFromYaml($configPath);

// Create a new EntityManager from our Configuration instance
$entityManager = EntityManager::createFromConfiguration($configuration);

// Fetch all the posts from the API
$posts = $entityManager->getRepository(Post::class)->findAll();

// Loop over the collection of posts to see their data
foreach($posts as $post) {
    
    // Instances of Author are lazy loaded when you need them.
    $author = $post->getAuthor() // Returns an instance of Author

    // No request is made to the API for the author until you request
    // data that wasn't available in the initial request.

    // The following request will not trigger a new call …
    $authorId = $author->getId();

    // …whereas this one will quietly populate the rest of Author
    $authorName = $author->getName();
    
}

Basic Usage

The following steps will show you a very simple usage of RESTORM for a project. We will setup RESTORM to talk to an artificial endpoint at https://example.com/api which serves a RESTful API. For this example we're going to create a very simple set of entities that would be useful for a blog. These will include a Post entity which has an Author entity associated with it.

Create Entities

To start off we'll create some classes for our entities. An entity is simply a resource object that's managed by RESTORM. An entity has properties which are populated from RESTful API calls as well as any other methods or logic you wish to have in them. Let's create a simple Post class:

<?php
# src/Entity/Post.php

namespace App\Entity;

class Post {

    private $id;

    private $title;

    public $content;

    private $author;

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getAuthor(): ?Author
    {
        return $this->author;
    }

    public function getTitle(): ?string
    {
        return $this->title;
    }

}

Entities are not required to extend any interfaces or classes in RESTORM - any class can become an entity. Notice as well that the Post::$id, Post::$title, and Post::$author are all private properties - this will not affect RESTORM's ability to manage these fields as it manages properties through reflection.

In our Post entity the "ID", "title", and "content" will all be simple scalar values from our API, but "author" is different; although this will be in integer in the API that represent the ID of an author, we'll instead want this property to be populated with an instance of Author. Before we create our configuration to do manage this and the other fields, let's create the Author class as well:

<?php
# src/Entity/Author.php

namespace App\Entity;

class Author {

    private $id;

    private $name;

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getName(): ?string
    {
        return $this->name;
    }
}

Create Configuration File

With our entity classes defined now it's time to move on to creating the configuration file. For this we're going to needs to know what URLs we need to call to get our entity data and what properties need populating on our entities. Let's assume for this example that we're going to need to talk to a RESTful endpoint at https://example.com/api. We'll add in the the following configuration file that will set up the connection details and the entity mappings:

connections:

    # Define a connection which describes where we get entities from
    default:

        # The base URI is going to include the /api path as this
        # is universal for all endpoints on this connection
        base_uri: https://example.com/api

        # Let RESTORM know what the parameters are for using
        # pagination with list endpoints
        pagination_parameters:
            page_param: page
            per_page_param: per_page

# Define the Post and Author entities
entity_mappings:

    # Use the fully qualified entity class name as the key
    App\Entity\Post:

        # Use our "default" connection we registered above
        connection: default

        # Use the internal entity repository for querying
        # for entities
        repository_class: TheSaleGroup\Restorm\EntityRepository

        # Define the paths to each of the actions used for
        # getting and saving entities
        paths:
            list: /posts
            get: /posts/{id}
            post: /posts/new
            patch: /posts/{id}/edit
            delete: posts/{id}

        # List our properties
        properties:
            id:
                # Let RESTORM know that the id is the identifier
                identifier: true
                type: integer
            title:
                type: string
                unique: true
            content:
                type: string
                # The content property is called "html_content"
                # in the API so map that to the "content"
                # property in the entity
                map_from: html_content
            # Relate a Post entity to an Author entity
            author:
                # We will set the type as "entity"…
                type: entity
                # …and set the entity class
                entity: Project\Entity\Author
    Project\Entity\Author:
        connection: default
        repository_class: TheSaleGroup\Restorm\EntityRepository
        paths:
            list: /authors
            get: /authors/{username}
            post: /authors
            patch: /authors/{username}
            delete: /authors/{username}
        properties:
            id:
                identifier: true
                type: integer
            name:
                type: string

You can view the full configuration reference here:

Initialize Manager

The entity manager is the heart of RESTORM. It controls entities as they go to and from the connections and connects each internal component. Let's create a simple script that creates a new EntityManager and fetches all our posts:

<?php

// Use the composer autoloader to load in RESTORM
require __DIR__ . '/../vendor/autoload.php';

use TheSaleGroup\Restorm\Configuration\Configuration;
use TheSaleGroup\Restorm\EntityManager;
use App\Entity\Post;

// Create a new Configuration instance based on our configuration
$configPath = '../config/restorm.yml';
$configuration = Configuration::buildFromYaml($configPath);

// Create a new EntityManager from our Configuration instance
$entityManager = EntityManager::createFromConfiguration($configuration);

With the EntityManager instantiated it can now be used to fetch entites:

// Fetch all the posts from the API
$posts = $entityManager->getRepository(Post::class)->findAll();

// Loop over the collection of posts to see their data
foreach($posts as $post) {
    
    // Instances of Author are lazy loaded when you need them.
    $author = $post->getAuthor() // Returns an instance of Author

    // No request is made to the API for the author until you request
    // data that wasn't available in the initial request.

    // The following request will not trigger a new call …
    $authorId = $author->getId();

    // …whereas this one will quietly populate the rest of Author
    $authorName = $author->getName();
    
}

thesalegroup / restorm

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