Select 数据和使用地点和地点 laravel 5.6

Question

我正在尝试创建 ( (Where and Where) OR (Where and Where) ) 经过大量搜索后我发现了这个

  $last_transations = Transcationhistorique::where('sender_id', '=', $user_id)
                            ->where('receiver_id','=', $user_id)
                            ->orderBy('created_at', 'desc')
                            ->skip(3)
                            ->take(3)
                            ->get();

我得到一个空结果

"last 3 transactions": []

Answer 1

如果您正在搜索简单的 where or where 然后使用（使用您的查询）：

$last_transations = Transcationhistorique::where('sender_id', $user_id)
                    ->orWhere('receiver_id', $user_id)
                    ->orderBy('created_at', 'desc')->skip(3)->take(3)->get();

如果您正在搜索 where and where 然后使用（使用您的查询）：

$last_transations = Transcationhistorique::where(['sender_id' => $user_id, 'receiver_id' => $user_id])
                    ->orderBy('created_at', 'desc')->skip(3)->take(3)->get();

如果您正在搜索 (where and where) OR (where and where) ，那有点复杂，您可以这样查询：

DB::table('users')
   ->where(['col1' => 'val1', 'col2' => 'val2'])
   ->orWhere(function ($query) {
         $query->where(['col3' => 'val3', 'col4' => 'val4']);
   })
   ->get();

引用here

Answer 2

您可以使用 where 并向其传递函数例如：

如果我想获取 admin 且 ID 为 4 或 5 的用户

$users->where("type","admin")->where(function($query){
        $query->where("id",4)->orWhere("id",5);
    })->get();

相当于：

SELECT * FROM users WHERE type = "admin" AND (id = 4 OR id = 5)

Answer 3

我认为您指定的 skip 和取值错误，您可以尝试以下操作吗：

$last_transations = Transcationhistorique::where('sender_id', $user_id)
                    ->orWhere('receiver_id', $user_id)
                    ->orderBy('created_at', 'desc')->skip(0)->take(3)->get();

从文档中说：

skip / take: To limit the number of results returned from the query, or to skip a given number of results in the query, you may use the skip and take methods:

您正在做的是跳过 3 并取 3，所以它会像 ->offset(3)->limit(3) 这样 return 为空！

Answer 4

  $last_transations = Transcationhistorique::where([['sender_id', '=', $user_id],['receiver_id','=', $user_id]])
                            ->orderBy('created_at', 'desc')
                            ->skip(3)
                            ->take(3)
                            ->get();

给你。

Select 数据和使用地点和地点 laravel 5.6

Select data and use where and where laravel 5.6

php

laravel

laravel-5

laravel-5.6