moodle/lib/classes/dml/sql_join.php
Tim Hunt 0d3bdb94bc MDL-68402 accesslib: fix get_with_capability_join logic
In fact, rather than fix the old logic, I noticed that the correct
logic was already implemented in get_users_by_capability. So, I
refactored to extract the working version into a function, which it
turns out can have exactly the same API as get_with_capability_join,
which was convenient.
2020-05-06 09:18:02 +01:00

93 lines
2.8 KiB
PHP

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* An object that contains sql join fragments.
*
* @since Moodle 3.1
* @package core
* @category dml
* @copyright 2016 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\dml;
defined('MOODLE_INTERNAL') || die();
/**
* An object that contains sql join fragments.
*
* An example of how to use this class in a simple query, where you have got
* a join that is a join to the user table:
*
* $users = $DB->get_records_sql("SELECT u.*
* FROM {user} u
* {$sqljoin->joins}
* WHERE {$sqljoin->wheres}", $sqljoin->params);
*
* @since Moodle 3.1
* @package core
* @category dml
* @copyright 2016 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class sql_join {
/**
* @var string joins.
*/
public $joins;
/**
* @var string wheres.
*/
public $wheres;
/**
* @var array params.
*/
public $params;
/**
* @var bool if true this join is guaranteed to never match any rows.
* In this case, the calling code may be able to completely
* skip doing the database query.
* @since Moodle 3.9/3.8.3/3.7.6.
*/
public $cannotmatchanyrows;
/**
* Create an object that contains sql join fragments.
*
* Note, even if you set $cannotmatchanyrows to true, it is
* important to also set the other fields because the calling
* code is not required to check it. For example
* new \core\dml\sql_join('', '1 = 2', [], true);
*
* @param string $joins The join sql fragment.
* @param string $wheres The where sql fragment.
* @param array $params Any parameter values.
* @param bool $cannotmatchanyrows If true, this join is guaranteed to match no rows. See comment on the field above.
*/
public function __construct($joins = '', $wheres = '', $params = array(), $cannotmatchanyrows = false) {
$this->joins = $joins;
$this->wheres = $wheres;
$this->params = $params;
$this->cannotmatchanyrows = $cannotmatchanyrows;
}
}