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<?php
/*
add InnoDB line to both, the current migration table and the target migration table
*/
public function up()
{
    Schema::create('registrations', function (Blueprint $table) {
        $table->engine = "InnoDB"; // engine handles foreign key constraints
        // $table->BigIncrements('id'); // shit breaks cascade down function, what a headache, needs to be "increments"
        $table->increments('id');
        $table->integer('user_id')->unsigned()->nullable() ;
       // $table->string('key_num'); // migrated to users table
        $table->dateTime('event_date') ;
        $table->timestamps();
    });

    // ON DELETE USER, DELETE ALL REGISTRATIONS THAT BELONG TO THIS USER
    Schema::table('registrations', function (Blueprint $table) {
        $table->foreign('user_id')->references('id')->on('users')->onUpdate('cascade');
    });

}