問題:
I'm trying to create foreign keys in Laravel however when I migrate my table using artisan
i am thrown the following error:我正在嘗試在 Laravel 中創建外鍵,但是當我使用artisan
遷移我的表時,我拋出了以下錯誤:
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL
: alter table `priorities` add constraint priorities_user_id_foreign foreign
key (`user_id`) references `users` (`id`))
My migration code is as so:我的遷移代碼如下:
priorities migration file優先級遷移文件
public function up()
{
//
Schema::create('priorities', function($table) {
$table->increments('id', true);
$table->integer('user_id');
$table->foreign('user_id')->references('id')->on('users');
$table->string('priority_name');
$table->smallInteger('rank');
$table->text('class');
$table->timestamps('timecreated');
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
//
Schema::drop('priorities');
}
users migration file用戶遷移文件
public function up()
{
//
Schema::table('users', function($table)
{
$table->create();
$table->increments('id');
$table->string('email');
$table->string('first_name');
$table->string('password');
$table->string('email_code');
$table->string('time_created');
$table->string('ip');
$table->string('confirmed');
$table->string('user_role');
$table->string('salt');
$table->string('last_login');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
//
Schemea::drop('users');
}
Any ideas as to what I've done wrong, I want to get this right now, as I've got a lot of tables I need to create eg Users, Clients, Projects, Tasks, Statuses, Priorities, Types, Teams.關於我做錯了什麼的任何想法,我想現在就得到這個,因爲我有很多表需要創建,例如用戶、客戶、項目、任務、狀態、優先級、類型、團隊。 Ideally I want to create tables which hold this data with the foreign keys, i..e clients_project
and project_tasks
etc.理想情況下,我想創建使用外鍵保存這些數據的表,即clients_project
和project_tasks
等。
Hope someone can help me to get started.希望有人可以幫助我開始。
解決方案:
參考一: https://stackoom.com/question/1WtR0參考二: Migration: Cannot add foreign key constraint