Add "ON DELETE CASCADE" To Existing Column In Laravel
Answer : Drop foreign key first. Thanks to Razor for this tip $table->dropForeign('answers_user_id_foreign'); $table->foreign('user_id') ->references('id')->on('users') ->onDelete('cascade'); $table->foreign('user_id') ->references('id')->on('users') ->onDelete('cascade'); In my case, i'll need to put the col name in an array else that will be an error. Schema::table('transactions', function (Blueprint $table) { $table->dropForeign(['transactions_order_id_foreign']); $table->foreign('order_id') ->references('id')->on('orders') ->onDelete('cascade') ->change(); }); mysql 5.7 ver