: 1005 無法創建表 `shop`.`role_user` (errno: 150 “外鍵約束格式不正確”)")

Question

嘿伙計們，我嘗試了太多東西並閱讀了一些博客或討論我沒有解決我的問題我是 laravel 這個項目的新手。 當我想創建數據庫時出現錯誤，例如

E:\xampp\htdocs\shop\vendor\laravel\framework\src\Illuminate\Database\Connection.php:463
      PDOException::("SQLSTATE[HY000]: General error: 1005 Can't create table `shop`.`role_user` (errno: 150 "Foreign key constraint is incorrectly formed")")

  2   E:\xampp\htdocs\shop\vendor\laravel\framework\src\Illuminate\Database\Connection.php:463
      PDOStatement::execute()

class CreateRoleAndPermissionTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('title')->nullable();
            $table->timestamps();
        });
        Schema::create('permissions', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('title')->nullable();
            $table->timestamps();
        });

        Schema::create('role_user', function (Blueprint $table) {
            $table->integer('role_id')->unsigned();
            $table->integer('user_id')->unsigned();

            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onDelete('cascade')
                ->onUpdate('cascade');

            $table->foreign('user_id')
                ->references('id')
                ->on('users')
                ->onDelete('cascade')
                ->onUpdate('cascade');

            $table->primary(['role_id','user_id']);
        });

        Schema::create('permission_role', function (Blueprint $table) {
            $table->integer('role_id')->unsigned();
            $table->integer('permission_id')->unsigned();


            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onDelete('cascade')
                ->onUpdate('cascade');

            $table->foreign('permission_id')
                ->references('id')
                ->on('permissions')
                ->onDelete('cascade')
                ->onUpdate('cascade');
            $table->primary(['permission_id','role_id']);
        });


    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('role_and_permission');
    }

Answer 1

將biginteger integer我假設您使用的是 Laravel 的當前版本，它將增量字段更改為“biginteger”。 和$table->increments('id'); 到$table->id();