yii2/tests/data/console/migrate_create/add_columns_prefix.php

<?php

return <<<CODE
<?php

use yii\db\Migration;

/**
 * Handles adding columns to table `{{%test}}`.
 * Has foreign keys to the tables:
 *
 * - `{{%user}}`
 * - `{{%product}}`
 * - `{{%user_order}}`
 */
class {$class} extends Migration
{
    /**
     * @inheritdoc
     */
    public function up()
    {
        \$this->addColumn('{{%test}}', 'user_id', \$this->integer());
        \$this->addColumn('{{%test}}', 'product_id', \$this->integer()->unsigned()->notNull());
        \$this->addColumn('{{%test}}', 'order_id', \$this->integer()->notNull());
        \$this->addColumn('{{%test}}', 'created_at', \$this->dateTime()->notNull());

        // creates index for column `user_id`
        \$this->createIndex(
            '{{%idx-test-user_id}}',
            '{{%test}}',
            'user_id'
        );

        // add foreign key for table `{{%user}}`
        \$this->addForeignKey(
            '{{%fk-test-user_id}}',
            '{{%test}}',
            'user_id',
            '{{%user}}',
            'id',
            'CASCADE'
        );

        // creates index for column `product_id`
        \$this->createIndex(
            '{{%idx-test-product_id}}',
            '{{%test}}',
            'product_id'
        );

        // add foreign key for table `{{%product}}`
        \$this->addForeignKey(
            '{{%fk-test-product_id}}',
            '{{%test}}',
            'product_id',
            '{{%product}}',
            'id',
            'CASCADE'
        );

        // creates index for column `order_id`
        \$this->createIndex(
            '{{%idx-test-order_id}}',
            '{{%test}}',
            'order_id'
        );

        // add foreign key for table `{{%user_order}}`
        \$this->addForeignKey(
            '{{%fk-test-order_id}}',
            '{{%test}}',
            'order_id',
            '{{%user_order}}',
            'id',
            'CASCADE'
        );
    }

    /**
     * @inheritdoc
     */
    public function down()
    {
        // drops foreign key for table `{{%user}}`
        \$this->dropForeignKey(
            '{{%fk-test-user_id}}',
            '{{%test}}'
        );

        // drops index for column `user_id`
        \$this->dropIndex(
            '{{%idx-test-user_id}}',
            '{{%test}}'
        );

        // drops foreign key for table `{{%product}}`
        \$this->dropForeignKey(
            '{{%fk-test-product_id}}',
            '{{%test}}'
        );

        // drops index for column `product_id`
        \$this->dropIndex(
            '{{%idx-test-product_id}}',
            '{{%test}}'
        );

        // drops foreign key for table `{{%user_order}}`
        \$this->dropForeignKey(
            '{{%fk-test-order_id}}',
            '{{%test}}'
        );

        // drops index for column `order_id`
        \$this->dropIndex(
            '{{%idx-test-order_id}}',
            '{{%test}}'
        );

        \$this->dropColumn('{{%test}}', 'user_id');
        \$this->dropColumn('{{%test}}', 'product_id');
        \$this->dropColumn('{{%test}}', 'order_id');
        \$this->dropColumn('{{%test}}', 'created_at');
    }
}

CODE;