有人可以帮我解决这个问题吗?
有 3 个表有 2 个外键:
Schema::create('users', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->string('email')->unique();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
Schema::create('firms', function (Blueprint $table) {
$table->increments('id');
$table->string('title')->nullable();
$table->integer('user_id')->unsigned()->nullable();
$table->foreign('user_id')->references('id')->on('users');
$table->timestamps();
});
Schema::create('jobs', function (Blueprint $table) {
$table->increments('id');
$table->string('title')->nullable();
$table->integer('firm_id')->unsigned()->nullable();
$table->foreign('firm_id')->references('id')->on('firms');
$table->timestamps();
});
运行迁移后出错:
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1005 Can't create table `job`.`#sql-5fc_a1`
(errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter ta
ble `firms` add constraint `firms_user_id_foreign` foreign key (`user_id`)
references `users` (`id`))
[PDOException]
SQLSTATE[HY000]: General error: 1005 Can't create table `job`.`#sql-5fc_a1`
(errno: 150 "Foreign key constraint is incorrectly formed")
原文由 Yrtymd 发布,翻译遵循 CC BY-SA 4.0 许可协议
在外键的情况下,引用字段和引用字段必须具有完全相同的数据类型。
您在
users
和firms
中创建id
字段作为有 符号 整数。但是,您将两个外键都创建为 无符号 整数,因此键的创建失败。您需要将
unsigned
子句添加到id
字段定义中,或者从外键字段中删除unsigned
子句。