How can I make auto-increment columns non-auto-increment? - php

Question

I am trying to create a table with this code.
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();
});
}
When I tried php artisan migrate it shows me this error.
[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 tableBookInfo(bookIdint not
null auto_increment primary key,Namevarchar(255) not null,
Publishervarchar(255) null,Publishing_yearint null
auto_increment primary key,Priceint null auto_increment primary key,
Languagevarchar(30) not null,created_attimestamp default 0
not null,updated_attimestamp default 0 not null) default character
set utf8 collate utf8_unicode_ci) and
[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
It seems laravel takes all the integer columns as auto-increment.What happened here actually and what will be solution?

Answer 1

The error says it all,
$table->integer('bookId',11);
^// this is considered as autoincrement rather than length
There is no length option for integers
See this
References on SO, this and this

Answer 2

$table->integer('bookId',11); is not syntactically correct in Eloquent ORM(you can't set any size limit for integers) and that is causing the error in your case.
And $table->increments('id'); automatically sets id as a primary key.
Find all necessary table building commands in Eloquent ORM here: http://laravel.com/docs/4.2/schema#adding-columns