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36 lines
1.2 KiB
PHP
36 lines
1.2 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db;
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/**
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* The MigrationInterface defines the minimum set of methods to be implemented by a database migration.
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*
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* Each migration class should provide the [[up()]] method containing the logic for "upgrading" the database
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* and the [[down()]] method for the "downgrading" logic.
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*
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* @author Klimov Paul <klimov@zfort.com>
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* @since 2.0
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*/
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interface MigrationInterface
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{
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/**
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* This method contains the logic to be executed when applying this migration.
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* @return bool return a false value to indicate the migration fails
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* and should not proceed further. All other return values mean the migration succeeds.
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*/
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public function up();
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/**
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* This method contains the logic to be executed when removing this migration.
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* The default implementation throws an exception indicating the migration cannot be removed.
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* @return bool return a false value to indicate the migration fails
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* and should not proceed further. All other return values mean the migration succeeds.
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*/
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public function down();
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}
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