Mongo $ addTo设置一个数组

Question

我有一个有效的查询：

$offenses = \App\LawCase::raw(function ($collection)  {
                return $collection->aggregate([
                    [
                        '$match' => ['active' => true, 'type' => 'criminal', 'current_offense_literal'=> ['$exists' => true]]
                    ],
                    [
                        '$group' => ['_id' => '$current_offense_category', 'offense_literals' => ['$addToSet' => '$current_offense_literal']]

                    ]
                ]);

            });

我只想向上面的addToSet添加一个附加值。例如，每个current_offense_literal都有一个current_offense_literal_value，我想将其与current_offense_literal一起添加。

我尝试过的事情：

$offenses = \App\LawCase::raw(function ($collection)  {
                return $collection->aggregate([
                    [
                        '$match' => ['active' => true, 'type' => 'criminal', 'current_offense_literal'=> ['$exists' => true]]
                    ],
                    [
                        '$group' => ['_id' => '$current_offense_category', 'offense_literals' => ['$addToSet' => ['$current_offense_literal'=>['$push'=> '$current_offense_literal_value']]]]

                    ]
                ]);

            });

但是我得到： 无法识别的表达式'$ current_offense_literal'。

Answer 1

尝试这样做，

$offenses = \App\LawCase::raw(function ($collection)  {
                return $collection->aggregate([
                    [
                        '$match' => ['active' => true, 'type' => 'criminal', 'current_offense_literal'=> ['$exists' => true]]
                    ],
                    [
                        '$group' => ['_id' => '$current_offense_category', 'offense_literals' => ['$addToSet' => ['current_offense_literal'=>'$current_offense_literal', 'current_offense_literal_value' =>'$current_offense_literal_value']]]

                    ]
                ]);

            });