rdx/db

Simple MySQL/SQLite wrapper

1.25 2022-09-21 21:49 UTC

MIT

• Rudie Dirkx

README

Drivers / adapters / databases

• SQLite 3 (via PDO)
• MySQLi

No SQLite 2 or procedural MySQL. What is it, 2003?

Where to start

Check out the test/ folder. It contains a few simple tests/examples.

Check out the projects where it's used. A powerful, very useful feature is the schema 'sync': create tables, columns, indexes, relations and fixtures, all in 1 clean array.

Do it! You can create other drivers. Just extend db_generic and db_generic_result. You can call it db_pgsql =) NoSQL won't work, because there's no Query builder (and there won't be).

Show me examples!

Okay.

Simple select. Will return an Iterable.

$users = $db->select('users', 'lastname <> ?', array("De'sander"));
print_r($users); // NOT a list of users

Get the first result object.

$user = $users->nextObject();
var_dump($user->lastname);

Do a GROUP BY and get a 2D array.

$users_by_lastname = $db->select_fields('users', 'lastname, COUNT(1)', 'active = ? GROUP BY lastname', array(1));
var_dump($users_by_lastname["De'sander"]);

Another one. Perfect for HTML <option>s.

$options = $db->select_fields('countries', 'code, name', array('active' => 1));

Return objects in a different class. Voila, Active Records. Use ->all() to fetch all objects.

$sessions = $db->fetch('SELECT s.* from sessions s, people p WHERE p.access_level = ? AND p.id = s.person_id', array(
	'params' => array(4),
	'class' => 'UserSession',
))->all();
var_dump(get_class($sessions[0])); // UserSession

More advanced conditions.

$people = $db->select('people', array(
	// Conditions
	'enabled' => 1,
	'age >= ?',
	'age <= ?',
	'lastname <> ?',
	'(a < b OR b IS NULL)'
), array(
	// Params
	18,
	65,
	"De'sander",
));

And ofcourse there's updating and inserting etc.

$bool = $db->update('people', array('enabled' => 0), array(
	'last_login' => 0,
	'favourite_pizza IS NULL',
));
$affected = $db->affected_rows();

$bool = $db->insert('people', array(
	'name' => 'De Rudie',
	'awesomeness' => true,
	'favourite_pizza' => null,
));
$pk = $db->insert_id();

Active Record Models

You can create models by extending db_generic_model:

class User extends db_generic_model {
	static public $_table = 'users';
}

And then make all procedures easier:

$user = User::find(12); // User|null

$user = User::first(['username' => 'sander']); // User|null

$users = User::all(['country_id' => 12]); // User[]

All objects are statically cached, so calling find(X) 6 times, takes it from the cache 5 times.

Do active things to active objects:

$user->update(['disabled' => true]);

$user->delete();

Or without the objects:

User::updateAll(['disabled' => true], ['username' => 'sander']);

User::deleteAll(['disabled' => true]);

Add dynamic properties with get_NAME().

class User extends db_generic_model {
	function get_fullname() {
		return "$this->firstname $this->lastname";
	}
}

echo $user->fullname;

Properties are cached in the object, so the getter is called only once.

Add relationships with relate_NAME():

class User extends db_generic_model {
	function relate_country() {
		return $this->to_one(Country::class, 'country_id');
	}

	function relate_hobbies() {
		return $this->to_many(Hobby::class, 'user_id');
	}

	function relate_groups() {
		return $this->to_many_through(Group::class, 'users_groups', 'user_id', 'group_id');
	}

	function relate_num_groups() {
		return $this->to_count(UserGroup::class, 'user_id');
	}

	function relate_group_ids() {
		return $this->to_many_scalar('group_id', 'users_groups', 'user_id');
	}
}

echo $user->country->name;
print_r($user->hobbies);
print_r($user->groups);
echo $user->num_groups;
print_r($user->group_ids);

All primary keys must be id. Foreign keys can be anything.