[英]Laravel 4 Migration - Cannot add foreign key constraint
這是我的遷移代碼:
public function up()
{
Schema::create('foos', function(Blueprint $table) {
// Primary key
$table->increments('id');
// Standard
$table->engine = 'InnoDB';
$table->timestamps();
$table->softDeletes();
});
Schema::create('bars', function(Blueprint $table) {
// Primary key
$table->increments('id');
// Define foreign key
$table->integer('foo_id')->unsigned;
// Foreign key contraints
// NOTE: causes "General error: 1215 Cannot add foreign key constraint"
// $table->foreign('foo_id')->references('id')->on('foos');
// Standard
$table->engine = 'InnoDB';
$table->timestamps();
$table->softDeletes();
});
}
public function down()
{
Schema::drop('foos');
Schema::drop('bars');
}
當沒有注釋掉定義外鍵約束的代碼時,我在命令行上收到以下錯誤: 常規錯誤:1215無法添加外鍵約束 。
我有什么想法我做錯了嗎?
$table->integer('foo_id')->unsigned;
應該
$table->integer('foo_id')->unsigned();
或者您可以使用簡短版本:
$table->unsignedInteger('foo_id');
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.