Indexes: Foreign Key Constraints

Schema::table('posts', function (Blueprint $table) {
    $table->unsignedInteger('user_id');

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

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

$table->dropForeign('posts_user_id_foreign');

$table->dropForeign(['user_id']);

Schema::enableForeignKeyConstraints();

Schema::disableForeignKeyConstraints();