Eloquent ORM導致MySQL選擇不返回所有行

我正在使用Laravel的Eloquent ORM來查詢數據庫的信息，但由於某種原因生成的查詢未返回所有行。Eloquent ORM導致MySQL選擇不返回所有行

鋒查詢：

\Permit::selectRaw('CONCAT(lk_departments.dept_id, ".") AS dept_id, '. 
        'lk_departments.dept_name, '. 
        'COUNT(DISTINCT permits.permit_number) AS total') 
     ->leftJoin('lk_departments', 'permits.dept_id', '=', 'lk_departments.dept_id') 
     ->where('permits.permit_number', '!=', 'N/A') 
     ->whereBetween('permits.valid_date', [$query_info['start_date'], $query_info['end_date']]) 
     ->groupBy('lk_departments.dept_name') 
     ->orderBy('lk_departments.dept_name', 'ASC') 
     ->get()

得到的查詢：

SELECT 
CONCAT(lk_departments.dept_id, ".") AS dept_id, lk_departments.dept_name, 
COUNT(DISTINCT permits.permit_number) AS total 
FROM permits 
LEFT JOIN lk_departments ON permits.dept_id = lk_departments.dept_id 
WHERE permits.valid_date BETWEEN '01/01/2000' AND '12/12/2100' 
GROUP BY lk_departments.dept_name 
ORDER BY lk_departments.dept_name ASC

返回的數據：

dept_id    dept_name      total 
+--------------------------------------------------------+ 
| NULL NULL          0 | 
| 1.  Academic Achievement-(Special Services) 11 | 
| 3.  Academic Clubs        1 | 
| 4.  Academic Custodial & Grounds Services  1 | 
| 5.  Accounting         2 | 
| 6.  Admissions         356 | 
| 7.  Advanced Programs Dept (Education Dept) 8 | 
| 9.  Aerospace Studies - Air Force ROTC   1 | 
| 11. American Federation of Teachers   0 | 
| 13. Anthropology        1 | 
| 14. Art Dept.         4 | 
| 17. Athletic Dept.        11 | 
| 21. Biology Dept.        2 | 
|              | 
| ... ...          ... | 
+--------------------------------------------------------+

我提到這個問題，修改total：Count distinct values

，但我仍然收到一個NULL一行0的total和失蹤記錄。我對MySQL不太好，所以如果我錯過了一些東西，請原諒我。理想情況下，我希望每個部門在特定時間範圍內獲得許可。

注：
dept_id =自動遞增鏈接到一個部門

來源

2014-09-10 hellaminx

將加入其中'dept_id爲IS NOT NULL'不省略那些不需要的行？ – tadman 2014-09-10 19:22:42

由於某些原因，添加'dept_id IS NOT NULL'會返回一個空集。 – hellaminx 2014-09-10 21:25:14

這特別奇怪。作爲一個註釋，你應該避免在查詢中使用表示類型的東西，比如將'.'附加到數字中，而不是保存它在任何視圖中顯示的時候。 – tadman 2014-09-10 21:35:49

我終於找出問題所在。當我在連接中使用permits作爲主表時，我忽略意識到如果沒有來自permits.dept_id的匹配lk_departments.dept_id的相應記錄（如果沒有人爲該部門註冊許可，則不會顯示dept_id的記錄）也就是說）。另外，出於某種原因，我不得不更改查詢以包含記錄，其中permits.permit_number is null。

得到的雄辯查詢：

LKDepartment::selectRaw('lk_departments.*, COUNT(permits.permit_number) AS total') 
      ->leftJoin('permits', 'lk_departments.dept_id', '=', 'permits.dept_id') 
      ->whereNull('permits.permit_number') 
      ->orWhereRaw("(permits.permit_number != 'N/A' AND permits.valid_date BETWEEN '$query_info[start_date]' AND '$query_info[end_date]')") 
      ->groupBy('lk_departments.dept_id') 
      ->orderBy('lk_departments.dept_id', 'ASC') 
      ->get()

結果查詢：

SELECT lk_departments.* , COUNT(permits.permit_number) AS total 
FROM lk_departments 
LEFT JOIN permits ON lk_departments.dept_id = permits.dept_id 
WHERE permits.permit_number IS NULL 
OR (
    permits.permit_number != 'N/A' 
    AND permits.valid_date BETWEEN '01/01/2000' AND '12/12/2100' 
) 
GROUP BY lk_departments.dept_id 
ORDER BY lk_departments.dept_id ASC

返回的數據：

dept_id    dept_name      total 
+--------------------------------------------------------+ 
| NULL NULL          0 | 
| 1  Academic Achievement-(Special Services) 11 | 
| 2  Academic Advising Center     0 | 
| 3  Academic Clubs        1 | 
| 4  Academic Custodial & Grounds Services  1 | 
| 5  Accounting         2 | 
| 6  Admissions         356 | 
| 7  Advanced Programs Dept (Education Dept) 8 | 
| 8  Advisory Council       0 | 
| 9  Aerospace Studies - Air Force ROTC   1 | 
| 10  Alternative School       0 | 
| 11  American Federation of Teachers   0 | 
| 12  Anthropology        0 | 
|              | 
| ... ...          ... | 
+--------------------------------------------------------+

來源

2014-09-12 19:06:50 hellaminx

主鍵
permits =表包含停車證信息我猜使用ORM你不能做的情況下。您應該以編程方式解決問題，如果您使用的是orm，它的更好的做法是，將數據庫映射到對象而不用處理結果

來源

2014-09-10 18:53:20

你可以使用帶有Eloquent ORM的case 'selectRaw'方法。這只是使用Eloquent之後得到的查詢**。 – hellaminx 2014-09-10 18:57:22

Eloquent ORM導致MySQL選擇不返回所有行

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