Respect\Relational

Fluent ORM

Quintessential sample

Tables used:

• author (id, name)
• post (id, author_id, title, text)
• comment (id, post_id, author_id, text)

PHP:

<?php
use PDO;
use Respect\Relational\Mapper;

$mapper = new Mapper(new PDO( /* my db conf */ ));

$postTwelve = $mapper->post[12]->fetch();
$commentsOnPostTwelve = $mapper->comment->post[12]->fetchAll();
$commentsOnPostsFromAuthorSeven = $mapper->comment->post->author[7]->fetchAll();

Thats it. It doesn't need configuration, entity classes or anything else. Plug and rock on.

Nice, but how it works?

If you're wondering how dirty are the SQL statements generated, well, they're pretty readable and smart. The last sample above generate something like this:

SELECT
    *
FROM 
    comment
INNER JOIN
    post
    ON comment.post_id = post.id
INNER JOIN
    author
    ON comment.author_id = author.id
WHERE
    author.id = 7;

Seems written by a human, doesn't? The mapper is able to treat duplicated columns, human readable joins and everything else without any configuration or extra SQL statements. It does not use SHOW TABLES or anything like it by default, but you can use it if you want.

More samples

Edit a post:

$post = $mapper->post[12]->fetch();
$post->title = "New Post title";
$mapper->persist($post);
$mapper->flush();

New comment:

$comment = new stdClass;
$comment->post_id = 3;   //you can use a post object if you want
$comment->author_id = 7; //same here
$comment->text = "hi there";
$mapper->persist($comment, 'comment');
$mapper->flush();

Edit a bunch of comments:

$comments = $mapper->comment->author[15]->fetchAll();

foreach ($comments as $c) {
    $c->text = "This user has been banned";
    $mapper->persist($c);
}

$mapper->flush();

Remove a previously fetched comment:

$comment = $mapper->comment[1651]->fetch();
$mapper->remove($comment);
$mapper->flush();

Last 10 comments from author (full code):

<?php
use PDO;
use Respect\Relational\Mapper;
use Respect\Relational\Sql;

$mapper = new Mapper(new PDO( /* my db conf */ ));

$lastComments = $mapper->comment
                       ->author[15]
                       ->fetchAll(Sql::orderBy('id desc')->limit(10));

Use entity classes (full code):

<?php
use PDO;
use Respect\Relational\Mapper;
use Respect\Relational\Sql;
use Respect\Relational\Schemas\Typed;
use Respect\Relational\Schemas\Infered;

$schemaProvider = new Typed(new Infered, 'MyNamespace\\Entities');
$mapper = new Mapper(new PDO( /* my db conf */ ), $schemaProvider);

$lastComments = $mapper->comment
                       ->author[15]
                       ->fetchAll(Sql::orderBy('id desc')->limit(10));

Entity classes must have public attributes, like this:

<?php

namespace MyNamespace\Entities;

class Comment 
{
    public $id;
    public $author_id;
    public $post_id;
    public $text;
}

Roadmap

• New Schema Providers:
  • ReverseEngineered (from metadata tables)
  • Config (from configuration)
  • Reflected (extract schema info from PHP objects)
  • DoctrineAnnotation (from Doctrine Annotations)
  • AutoGenerated (creates and alters the tables itself, without configuration)
• New Schema Decorators:
  • Cached (cache metadata for some schema providers)
  • LazyLoaded (less joins, more small queries)
• Table inheritance (abstract for single table and concrete for multi table)
• Support for value objects

License Information

Copyright (c) 2009-2011, Alexandre Gomes Gaigalas. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of Alexandre Gomes Gaigalas nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.