Add “ON DELETE CASCADE” to existing column in Laravel

Question

I have user_id fk column in my table

$table->foreign(\'user_id\')->references(\'id\')->on(\'users\');

I should add on cascade

Answer 1

$table->integer('user_id')->unsigned();    
$table->foreign('user_id')
      ->references('id')->on('users')
      ->onDelete('cascade');

I am assuming you used Illuminate\Database\Schema\Blueprint::primary() to create users.id. If that is the case, then users.id will be unsigned. Therefore your foreign key column user_id must also be unsigned.