如何使自動增量列非自動增量？

Question

我想用這段代碼創建一個表。

public function up() 
{ 
    Schema::create('BookInfo', function (Blueprint $table) { 
     $table->increments('id'); 
     $table->integer('bookId',11); 
     $table->string('Name',255); 
     $table->string('Publisher')->nullable(); 
     $table->integer('Publishing_year',4)->nullable(); 
     $table->integer('Price',5)->nullable(); 
     $table->string('Language',30); 
     $table->timestamps(); 
    }); 
} 

當我試着php artisan migrate它顯示我這個錯誤。

[Illuminate\Database\QueryException]
SQLSTATE[42000]: Syntax error or access violation: 1075 Incorrect table definition; there can be only one auto column and it must be defined as a key (SQL: create table的BookInfo ( BOOKID int not null auto_increment primary key,名稱varchar(255) not null, 出版商varchar(255) null, Publishing_year int null auto_increment primary key,價格int null auto_increment primary key, 語言varchar(30) not null, created_at timestamp default 0 not null,的updated_at timestamp default 0 not null) default character set utf8 collate utf8_unicode_ci)和

[PDOException]
SQLSTATE[42000]: Syntax error or access violation: 1075 Incorrect table definition; there can be only one auto column and it must be defined as a key

看來laravel通吃整列，自動遞增。這裏發生了什麼事實，而且t會是解決方案嗎？

Answer 1

$table->integer('bookId',11);在語法上不正確在雄辯ORM（你不能設置任何大小limi t爲整數），這是你的情況造成的錯誤。

和$table->increments('id');自動將id設置爲primary key。

在Eloquent ORM中查找所有必要的表格命令：http://laravel.com/docs/4.2/schema#adding-columns

Answer 2

錯誤說，這一切，

$table->integer('bookId',11); 
          ^// this is considered as autoincrement rather than length 

沒有爲整數

沒有長度的選項查看SO this

參考，this和this