cakephp / phinx

     * @return array A tuple containing the list of actions without actions for dropping the index

     * and a list of drop index actions that were removed.

     */

    protected function forgetDropIndex(Table $table, array $columns, array $actions)

    {

        $dropIndexActions = new ArrayObject();

        $indexes = array_map(function ($alter) use ($table, $columns, $dropIndexActions) {

            if ($alter->getTable()->getName() !== $table->getName()) {

                return $alter;

            }

            $newAlter = new AlterTable($table);

            foreach ($alter->getActions() as $action) {

                if ($action instanceof DropIndex && $action->getIndex()->getColumns() === $columns) {

                    $dropIndexActions->append($action);

                } else {

                    $newAlter->addAction($action);

                }

            }

            return $newAlter;

        }, $actions);

        return [$indexes, $dropIndexActions->getArrayCopy()];

    }

    /**

     * Deletes any RemoveColumn actions for the given table and exact columns

     * @return array A tuple containing the list of actions without actions for removing the column

     * and a list of remove column actions that were removed.

     */

    protected function forgetRemoveColumn(Table $table, array $columns, array $actions)

    {

        $removeColumnActions = new ArrayObject();

        $indexes = array_map(function ($alter) use ($table, $columns, $removeColumnActions) {

            if ($alter->getTable()->getName() !== $table->getName()) {

                return $alter;

            }

            $newAlter = new AlterTable($table);

            foreach ($alter->getActions() as $action) {

                if ($action instanceof RemoveColumn && in_array($action->getColumn()->getName(), $columns, true)) {

                    $removeColumnActions->append($action);

                } else {

                    $newAlter->addAction($action);

                }

            }

            return $newAlter;

        }, $actions);

        return [$indexes, $removeColumnActions->getArrayCopy()];

    }

    /**

     * Collects all table creation actions from the given intent