mysql - 如果父表中的行被删除，如何自动从子表中删除行

Question

我有两张 table (客户和预订)

客户表:

|       id       |
|      name      |
|   created_at   |
|   updated_at   |

预订表:

|       id         |
|     product      |
|   customer_id    |
|    created_at    |
|    updated_at    |

如何创建迁移文件，以便在删除客户时删除与客户相关的所有预订？

Answer 1

只需设置外键onDelete即可级联

Schema::create('bookings_table', function (Blueprint $table) {
    $table->increments('id');
    $table->string('product');
    $table->unsignedInteger('customer_id');
    $table->timestamps();

    $table->foreign('customer_id')
        ->references('id')
        ->on('customer_table')
        ->onDelete('cascade')
        ->onUpdate('cascade');
});