Laravel 4查询生成器SQL语句

Question

美好的一天，我有这个SQL语句，并且在如何在Laravel查询中转换此语句时遇到了困难。

我在http://laravel.com/docs/4.2/queries中阅读了文档，我很困惑。 任何帮助都可以。

SELECT count(*) FROM `transactions` WHERE `borrower_id` = 2 
            AND `book_id` = 2 AND (
                (
                    `reservedDate` IS NOT NULL 
                    and `borrowedDate` IS NULL
                ) 
                OR (
                    `borrowedDate` IS NOT NULL 
                    AND `returnedDate` IS NULL
                )
            )

Answer 1

因此，我尝试通过阅读Laravel的文档来构建此查询。 尚未进行测试，但希望它能给您正确的方向。

也许下次，您应该显示自己的查询（如果不正确，可以）。 从那里开始更容易。

$super_query = DB::table('transactions')->where('borrower_id' , '=' , 2)->where('book_id', '=' , 2)->where( function ( $query ) {
$query->where(function ($query1) {
    $query1->whereNotNull('reservedDate')->whereNull('borrowedDate')
)->orWhere(function ($query2) {
    $query2->whereNotNUll('borrowedDate')->whereNull('returnedDate')
})  
})->count();

Answer 2

    DB::table('transactions')
  ->Where('borrower_id', '=', 2)
  ->Where('book_id', '=', 2)
  ->where(function($query)
  {
    $query->where(function($query1) {
      $query1->whereNotNull('reservedDate')
             ->whereNull('borrowedDate');

    })
    ->orWhere(function($query2) {
      $query2->whereNotNull('borrowedDate')
             ->whereNull('returnedDate');
  });
})->count();

试试这个..这将导致

select count(*) from `transactions` where `borrower_id` = 2 and `book_id` = 2 and ((`reservedDate` is not null and `borrowedDate` is null) or (`borrowedDate` is not null and `returnedDate` is null))

Answer 3

尝试这个：

雄辩

Transactions::where('borrower_id', '=', 2)
    ->where('book_id', '=', 2)
    ->where(function($query)
    {
        $query->whereNotNull('reservedDate')
                ->whereNull('borrowedDate');
    })
    ->orWhere(function($query)
    {
        $query->whereNotNull('borrowedDate')
                ->whereNull('returnedDate');
    })
    ->count();

Answer 4

book::count()->where('borrower_id','=','2','book_id','=',2)