Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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migration_interface.php
01 <?php
02 /**
03 *
04 * This file is part of the phpBB Forum Software package.
05 *
06 * @copyright (c) phpBB Limited <https://www.phpbb.com>
07 * @license GNU General Public License, version 2 (GPL-2.0)
08 *
09 * For full copyright and license information, please see
10 * the docs/CREDITS.txt file.
11 *
12 */
13
14 namespace phpbb\db\migration;
15
16 /**
17 * Base class interface for database migrations
18 */
19 interface migration_interface
20 {
21 /**
22 * Defines other migrations to be applied first
23 *
24 * @return array An array of migration class names
25 */
26 static public function depends_on();
27
28 /**
29 * Allows you to check if the migration is effectively installed (entirely optional)
30 *
31 * This is checked when a migration is installed. If true is returned, the migration will be set as
32 * installed without performing the database changes.
33 * This function is intended to help moving to migrations from a previous database updater, where some
34 * migrations may have been installed already even though they are not yet listed in the migrations table.
35 *
36 * @return bool True if this migration is installed, False if this migration is not installed (checked on install)
37 */
38 public function effectively_installed();
39
40 /**
41 * Updates the database schema by providing a set of change instructions
42 *
43 * @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
44 */
45 public function update_schema();
46
47 /**
48 * Reverts the database schema by providing a set of change instructions
49 *
50 * @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
51 */
52 public function revert_schema();
53
54 /**
55 * Updates data by returning a list of instructions to be executed
56 *
57 * @return array Array of data update instructions
58 */
59 public function update_data();
60
61 /**
62 * Reverts data by returning a list of instructions to be executed
63 *
64 * @return array Array of data instructions that will be performed on revert
65 * NOTE: calls to tools (such as config.add) are automatically reverted when
66 * possible, so you should not attempt to revert those, this is mostly for
67 * otherwise unrevertable calls (custom functions for example)
68 */
69 public function revert_data();
70 }
71