개시하다

코드

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class MigrationFile extends Migration
{

    public $tableName = 'sample_table';
    public $connect   = 'mysql_test';

    public function up() {

        Schema::connection($this->connect)->table($this->tableName, function(Blueprint $table) {
            $indexes = \DB::connection($this->connect)->select(\DB::raw("SHOW INDEX FROM {$this->tableName};"));

            // インデックス削除
            $key = 'index_1';
            if ($this->hasIndex($indexes, $key))
            {
                $table->dropIndex([$key]);
            }

            // インデックス作成
            $key = 'index_2';
            if (!$this->hasIndex($indexes, $key))
            {
                $table->index($key);
            }

        });
    }

    public function down() {

    }

    /**
     * hasIndex
     * @parameter : indexes as object, $key as string
     * @return    : true or false
     **/
    private function hasIndex($indexes, $key) {
        foreach ($indexes as $index) {
            if ($index->Column_name == $key)
            {
                return true;
            }
        }
        return false;
    }

감상