如何通过 laravel 查询获得具有相似兴趣的用户

Question

我有这个 sql 查询来获取至少有 3 个共同兴趣的用户。

$get_similar =  $db->query(sprintf('SELECT ui.user_id, COUNT( * ) AS common_interests
                                                FROM users_interests ui
                                                WHERE ui.interests_id
                                                IN (

                                                SELECT ui2.interests_id
                                                FROM users_interests ui2
                                                WHERE ui2.user_id = %s
                                                )
                                                AND ui.user_id <> %s
                                                GROUP BY ui.user_id
                                                HAVING common_interests >2
                                                ', secure($this->_data['user_id']), secure($this->_data['user_id']) ));

如何将上述 sql 查询转换为 laravel eloquent 查询？

Answer 1

像这样的东西应该可以工作

$get_similar = \DB::raw('SELECT ui.user_id, COUNT( * ) AS common_interests
    FROM users_interests ui
    WHERE ui.interests_id
    IN (  
    SELECT ui2.interests_id
    FROM users_interests ui2')
        ->where('ui2.user_id','=', secure($this->_data['user_id']))
        ->where('ui.user_id','<>', secure($this->_data['user_id'])
        ->groupBy('ui.user_id')
        ->having('common_interests', '>', '2')_;

或完全 eloquent 版本（必须使用 DB 而不是模型，因为我不知道你的模型）

$get_similar = \DB::select('ui.user_id, COUNT( * ) AS common_interests')
->from('users_interests ui')
->whereIn('ui.interests_id', function($query) {
    $query->select('ui2.interests_id')
    ->from('users_interests as ui2');
 })
->where('ui2.user_id','=', secure($this->_data['user_id']))
->where('ui.user_id','<>', secure($this->_data['user_id'])
->groupBy('ui.user_id')
->having('common_interests', '>', '2')->get();

Answer 2

下面的查询就可以了

$user_interests = User::find($user_id)->interests->pluck('id')->toArray();

    $get_similar = DB::table('users_interests')
        ->select(DB::raw('count(*) as common_interests, user_id'))
        ->whereIn('interest_id', $user_interests)
        ->where('user_id','<>', 3)
        ->groupBy('user_id')
        ->havingRaw('COUNT(*) > 2')
        ->get();

如何通过 laravel 查询获得具有相似兴趣的用户

how to get users having similar interests with laravel query

mysql

sql

laravel

laravel-query-builder