[英]General error: 1005 Can't create table errno: 150 “Foreign key constraint is incorrectly formed”)
[英]Laravel General error: 1005 Can't create table `categories_products` (errno: 150 "Foreign key constraint is incorrectly formed")
嘗試在 Laravel 中遷移並彈出此錯誤。 我認為錯誤可能是 bigInteger 類型,因為我在另一個相同的問題答案中發現。 請參閱將 bigInteger 更改為 bigIncrements,但我沒有遇到有關類型約束的另一個錯誤。
代碼
public function up()
{
Schema::create('categories_products', function (Blueprint $table) {
$table->bigInteger('category_id')->unsigned()->index();
$table->bigInteger('product_id')->unsigned()->index();
$table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
$table->foreign('product_id')->references('id')->on('products')->onDelete('cascade');
});
}
錯誤
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1005 Can't create table `categories_products` (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter table `categori
es_products` add constraint `categories_products_category_id_foreign` foreign key (`category_id`) references `categories` (`id`) on delete cascade)
[Doctrine\DBAL\Driver\PDOException]
SQLSTATE[HY000]: General error: 1005 Can't create table `categories_products` (errno: 150 "Foreign key constraint is incorrectly formed")
[PDOException]
SQLSTATE[HY000]: General error: 1005 Can't create table `categories_products` (errno: 150 "Foreign key constraint is incorrectly formed")
謝謝。
如果沒有看到關系的目標表上的列定義,很難給出明確的答案。 類型需要匹配。 因此,如果您在 id 字段中使用 bigIncrements(),那么unsignedBigInteger()
或bigInteger()->unsigned()
都應該用作外鍵的類型,但是如果您使用increments
作為 id 則外鍵需要是unsignedInteger()
或integer()->unsigned()
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