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8645321f40
Returning the set of schema changes allows potentially aggregating to generate the overall install schema automatically from a set of migrations PHPBB3-9737
80 lines
1.3 KiB
PHP
80 lines
1.3 KiB
PHP
<?php
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/**
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*
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* @package db
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* @copyright (c) 2011 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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*
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*/
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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/**
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* Abstract base class for database migrations
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*
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* Each migration consists of a set of schema and data changes to be implemented
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* in a subclass. This class provides various utility methods to simplify editing
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* a phpBB.
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*
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* @package db
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*/
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class phpbb_db_migration
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{
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var $db;
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var $db_tools;
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/**
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* Migration constructor
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*
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* @param dbal $db Connected database abstraction instance
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* @param phpbb_db_tools $db_tools Instance of db schema manipulation tools
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*/
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function phpbb_db_migration(&$db, &$db_tools)
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{
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$this->db = &$db;
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$this->db_tools = &$db_tools;
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}
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/**
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* Defines other migrationsto be applied first (abstract method)
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*
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* @return array An array of migration class names
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*/
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function depends_on()
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{
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return array();
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}
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/**
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* Updates the database schema by providing a set of change instructions
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*
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* @return array
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*/
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function update_schema()
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{
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return array();
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}
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/**
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* Updates data
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*
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* @return null
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*/
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function update_data()
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{
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}
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/**
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* Adds a column to a database table
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*/
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function db_column_add($table_name, $column_name, $column_data)
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{
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$this->db_tools->sql_column_add($table_name, $column_name, $column_data);
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}
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}
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