Laravel hadManyThrough relationship

Question

所以我有3個型號User,League和Submission。我試圖查詢所有leagues一個user已經有submissions到。

星展的樣子：

用戶

Standard Laravel users table 

聯賽

id | name | description 

提交

id | user_id | league_id 

在我 user模型

我有

public function joinedLeagues() 
    { 
     return $this->hasManyThrough('App\League', 'App\Submission'); 
    } 

但這不會返回任何內容。我做錯了嗎？

Answer 1

雄辯會檢查中間submissions表user_id查找匹配提交ID後，他們將用於查詢leagues表。你的表必須是這樣的：

用戶：

id - interger 
name - string 

意見：

id - integer 
user_id - integer 
name - string 
description - string 

聯賽：

id - integer 
name - string 
submission_id - integer 

Answer 2

這裏是我做的，現在我知道有一個findMany用Laravel查詢

public function joinedLeagues() 
    { 
     //Make and empty array 
     $league_ids = array(); 

     //Get all submissions from the user 
     $submissions = Auth::user()->submissions; 

     foreach ($submissions as $submission) { 
      //Add the league id to the array 
      array_push($league_ids, $submission->league_id); 
     } 

     //Now find the leagues based off submissions 
     $leagues = League::findMany($league_ids); 

     return $leagues; 
    }