Laravel - 播种大型SQL文件

Question

当我在生产中运行我的DB种子脚本时,会发生内存耗尽.

下面是我的种子脚本.

class MembershipTableSeeder extends Seeder 
{
    public function run()
    {
        DB::table('members')->delete();

        foreach (range(1, 99) as $days){
            Members::create(array('membership_code' => 'test'.$days));
        }

        DB::unprepared(file_get_contents(app_path()."/database/seeds/members.sql"));
    }
}

所以我所做的是在我的种子脚本上添加一个无限制.

ini_set('memory_limit', '-1');

现在的问题是,当我运行脚本时,它会将输出记录到终端中,SQL脚本的内容(非常非常大).

有没有一种在我的数据库种子中运行SQL转储的好方法,它不会消耗太多内存？我现在做的是手动运行:

mysql -uuser -p db < script.sql

Answer 1

对于喜欢更多Laravel-ish解决方案的其他人来说,这就是我处理它的方式:

/**
 * This class is responsible for running the data dump sql.
 * It is recommended to update this class instead of creating new ones for new database content dumps.
 */
class DatabaseDumpSeeder extends Seeder
{
    /**
     * Run the database seeds.
     * @throws \Exception
     */
    public function run()
    {
        // Note: these dump files must be generated with DELETE (or TRUNCATE) + INSERT statements
        $sql = file_get_contents(__DIR__ . '/dumps/dump-20150709.sql');

        if (! str_contains($sql, ['DELETE', 'TRUNCATE'])) {
            throw new Exception('Invalid sql file. This will not empty the tables first.');
        }

        // split the statements, so DB::statement can execute them.
        $statements = array_filter(array_map('trim', explode(';', $sql)));

        foreach ($statements as $stmt) {
            DB::statement($stmt);
        }
    }
}

Answer 2

问题发生的原因是,当使用Db :: nothingpared时,它还会将查询记录到laravel.log文件中,在后台进行更多操作然后你会想到,从这一方面你就有内存耗尽.如果您没有运行安全模式,我会坚持执行如下控制台命令:

exec("mysql -u ".\Config::get('database.mysql.user')." -p".\Config::get('database.mysql.password')." ".\Config::get('database.mysql.database')." < script.sql")