Laravel 4複雜的查詢與聯盟/加入

Question

有人可以幫助我嗎？

當用戶向管理員發送消息時，它將生成batch_id，然後當管理員向用戶發送消息時，batch_id將爲空。

下面是表結構。

messages table: 
--------------------------------------------------------------- 
id | sender_id | recipient_id | batch_id | subject | content 
--------------------------------------------------------------- 
    1  3   1   $2yQr  test  test 
--------------------------------------------------------------- 
    2  3   2   $2yQr  test  test 
--------------------------------------------------------------- 
    3  2   3      test2 test2 
--------------------------------------------------------------- 

users table 
------------------------ 
    id | name | role 
------------------------ 
    1  admin1 | ADMIN 
------------------------ 
    2  admin2 | ADMIN 
------------------------ 
    3  user | USER 

在上述記錄中。 具有相同batch_id的消息是用戶發送給管理員的消息 然後帶有空batch_id的消息是管理員發送給用戶的消息。

用戶應該只看到這樣的

---

id | sender_id | recipient_id | batch_id | subject | content 
--------------------------------------------------------------- 
    1  3   1   $2yQr  test  test 
--------------------------------------------------------------- 
    3  2   1      test2 test2 
--------------------------------------------------------------- 

我有什麼到目前爲止

Select c.id,sender_id, recipient_id, subject, content, s.name as sender, r.name as recipient 
     from (Select id,sender_id, recipient_id, subject, content from messages where batch_id is null 
     union Select (Select b.id from messages b where b.id=a.id limit 1) as id, a.sender_id,a.recipient_id, a.subject, 
     a.content from messages a where a.batch_id is not null group by a.batch_id) as 
     c JOIN users as s ON s.id = c.sender_id JOIN users as r ON r.id = c.recipient_id where (c.sender_id =3 
     or c.recipient_id = 3) 

上述作品查詢作爲預期，但他們要我用查詢生成器伶牙俐齒從laravel

有人可以幫助我使用查詢生成器或雄辯從上面的查詢或可能someo NE有一個更好的查詢，很容易轉化爲查詢生成器或雄辯

我目前新laravel

謝謝！

Answer 1

我想我會回答我自己的問題，以防有人遇到這種情況，可能會有所幫助。

挖了一段時間我能夠轉換查詢並使用查詢生成器從laravel。

 $first = \DB::table('messages as a')->select(\DB::raw('(select b.id from messages b where b.id=a.id limit 1) as id'),'a.sender_id','a.recipient_id','a.subject','a.content') 
        ->whereNotNull('a.batch_id')->groupBy('a.batch_id'); 
     $second = \DB::table('messages')->select('id','sender_id','recipient_id','subject','content')->whereNull('batch_id') 
        ->union($first); 
     $data_query = \DB::table(\DB::raw("({$second->toSql()}) as c")) 
      ->select('c.id','c.sender_id','c.recipient_id','subject','content','s.name as sender','r.name as recipient'') 
      ->join('users as s','s.id','=','c.sender_id') 
      ->join('users as r','r.id','=','c.recipient_id') 
      ->whereRaw('(sender_id =' .$id . ' OR ' . 'recipient_id ='. $id.')') 
      ->whereRaw('(subject LIKE '. '"%' .$subject.'%"' .' OR ' . 'content LIKE ' . '"%' .$subject.'%")') 
      ->whereRaw('(s.email LIKE '. '"%' .$sender.'%"' .' OR ' . 's.name LIKE ' . '"%' .$sender.'%")') 
      ->get();