自定义laravel中migrate的字段

https://coderwall.com/p/mo1gew/custom-datatype-in-laravel-schema-builder

扩展GRAMMAR和Blueprint类

use Illuminate\Support\Fluent;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Grammars\MySqlGrammar;

/**
* Extended version of MySqlGrammar with
* support of 'set' data type
*/
class ExtendedMySqlGrammar extends MySqlGrammar {

	/**
 	* Create the column definition for an 'set' type.
 	*
 	* @param  \Illuminate\Support\Fluent  $column
	* @return string
 	*/
	protected function typeSet(Fluent $column)
	{
    	return "set('".implode("', '", $column->allowed)."')";
	}

}
/**
* Extended version of Blueprint with
* support of 'set' data type
*/
class ExtendedBlueprint extends Blueprint {

	/**
 	* Create a new 'set' column on the table.
 	*
 	* @param  string  $column
 	* @param  array   $allowed
 	* @return \Illuminate\Support\Fluent
 	*/
	public function set($column, array $allowed)
	{
   		return $this->addColumn('set', $column, compact('allowed'));
	}

}

用自定义的方法替换默认的Grammar和Blueprint类

// register new grammar class
DB::connection()->setSchemaGrammar(new ExtendedMySqlGrammar());
$schema = DB::connection()->getSchemaBuilder();

// replace blueprint
$schema->blueprintResolver(function($table, $callback) {
return new ExtendedBlueprint($table, $callback);
});

将migrate文件中的Schema::create 换成 $schema->create

$schema->create('example_table', function(ExtendedBlueprint $table)
{
	$table->increments('id');
	$table->text('sentence');

	// text source & author
	$table->string('author')->nullable();
	$table->string('source')->nullable();

	// technical data
	$table->set('difficulty', range(1, 10)); // use new datatype
	$table->boolean('enabled')->default(true);
});