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                            結構生成器支持多種索引類型，有兩種方法可以加入，方法一，您可以在定義字段時順便附加上去，或者是分開另外加入：
~~~
$table->string('email')->unique();
~~~

或者，您可以獨立一行來加入索引，以下是支持的索引類型：
|命令|功能描述|
|------------|
|$table->primary('id');|加入主鍵 (primary key)|
|$table->primary(array('first', 'last'));|加入復合鍵 (composite keys)|
|$table->unique('email');|加入唯一索引 (unique index)|
|$table->index('state');|加入基本索引 (index)|
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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