laravel collections-> keyBy發現類似鑰匙

Question

laravel 5.5 這裏是集合：

$collections = collect(['name' => 'Rob'], ['nickname' => 'Robby']);

的兩種方法：

$collections->keyBy('name') 
$collections->keyBy('nickname') 

回報角球面上結果

Collection {#246 ▼ 
    #items: array:1 [▼ 
    "" => "Rob" 
    ] 
} 

爲我看起來像錯了...

Answer 1

您的問題是你的集合格式不正確，像這樣做：

$collections = collect([ //main collection array 
      [ 'name' => 'Rob1', 'nickname' => 'Robby1' ] //object 0 inside collection array with well formated keys => values 
     ]); 

現在當你使用：

$collections->keyBy('name') 
$collections->keyBy('nickname') 

它將按預計工作

Answer 2

我想你應該傳遞一個參數數組..嘗試這個

$collections = collect([['name' => 'Rob'], ['nickname' => 'Robby']]); 

Answer 3

這樣的結果是

Collection {#246 ▼ 
    #items: array:2 [▼ 
    "Rob" => array:1 [▼ 
     "name" => "Rob" 
    ] 
    "" => array:1 [▼ 
     "nickname" => "Robby" 
    ] 
    ] 
} 

和

Collection {#246 ▼ 
    #items: array:2 [▼ 
    "" => array:1 [▼ 
     "name" => "Rob" 
    ] 
    "Robby" => array:1 [▼ 
     "nickname" => "Robby" 
    ] 
    ] 
} 

看起來仍然無效搜索在集合.. 。 and

個$collections->keyBy('nick')

回報

Collection {#246 ▼ 
    #items: array:1 [▼ 
    "" => array:1 [▼ 
     "nickname" => "Robby" 
    ] 
    ] 
}