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[英]MySQL error 1005 errno 150 Foreign key constraint is incorrectly formed
[英]MySQL create table: error 1005 errno: 150 “Foreign key constraint is incorrectly formed”
为什么 laravel 架构回复:
SQLSTATE[HY000]:一般错误:1005 无法创建表
employee_management
。employees
(errno: 150 "Foreign key constraint is wrongly forms") (SQL: alter tableemployees
add constraintemployees_city_id_foreign
外键(city_id
)引用city
(id
))PDOException::("SQLSTATE[HY000]: 一般错误: 1005 无法创建表
employee_management
employees
(errno: 150 "外键约束格式不正确")")
我的表:
Schema::create('employees', function (Blueprint $table) {
$table->increments('id', true);
$table->string('lastname', 60);
$table->string('firstname', 60);
$table->string('middlename', 60);
$table->string('address', 120);
$table->integer('city_id')->unsigned();
$table->integer('state_id')->unsigned();
$table->integer('country_id')->unsigned();;
$table->foreign('city_id')->references('id')->on('city');
$table->foreign('state_id')->references('id')->on('state');
$table->foreign('country_id')->references('id')->on('country');
$table->char('zip', 10);
$table->integer('age')->unsigned();
$table->date('birthdate');
$table->date('date_hired');
$table->integer('department_id')->unsigned();
$table->integer('division_id')->unsigned();
// $table->integer('company_id')->unsigned();
$table->foreign('department_id')->references('id')->on('department');
$table->foreign('division_id')->references('id')->on('division');
// $table->foreign('company_id')->references('id')->on('company');
$table->string('picture', 60);
$table->timestamps();
$table->softDeletes();
});
我的第二张城市表:
Schema::create('city', function (Blueprint $table) {
$table->increments('id', true);
$table->integer('state_id')->unsigned();
$table->foreign('state_id')->references('id')->on('state');
$table->string('name', 60);
$table->timestamps();
$table->softDeletes();
});
PS我的Laravel版本是8.12
原因是您在创建city
表之前尝试迁移employee
表,这很重要,因为您的employee
表通过外键依赖于city
表。
要解决这个问题,首先尝试迁移城市表。
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