Laravel如何运行作为数组值并传递给视图的雄辩查询？

Question

由于一个案例，我需要将多个表 eloquent 查询存储到一个数组中并将它们传递给视图，然后在视图内部我应该处理它们。那么我该怎么做呢，我试过call_user_func() 和call_user_func_array() bot 没有解决问题并且无法运行。下面是我的雄辩之列。

$my_eloquent_array = array('course' => 'App\Models\Course::all();',
            'user' => 'App\Models\User::whereHas(
                    \'roles\', function($q){
                    $q->where(\'name\',\'course_coordinator\');
                }
                )->get(array(\'id\',DB::raw(\'CONCAT(first_name, " ", last_name) AS full_name\')))'
);

那么现在在循环内的视图中我如何运行那些雄辩的数组值？

$resourceDropdowns = array(
    'curriculum_id'             => array('query' => 'App\Models\ProfessionalDevelopment\Curriculum::all(\'id\',\'name\')', 'label' => 'Curriculum'),
    'classroom_id'              => array('query' => 'Classroom::all(\'id\',\'no\')', 'label' => 'Classroom'),
    'training_coordinator_id'   => array('query' => 'User::whereHas(
                    \'roles\', function($q){
                    $q->where(\'name\',\'course_coordinator\');
                }
                )->get(array(\'id\',DB::raw(\'CONCAT(first_name, " ", last_name) AS full_name\')))', 'label' => 'Training Coordinator'),
    'focal_point_id'            => array('query' => 'User::whereHas(
                    \'roles\', function($q){
                    $q->where(\'name\',\'focal_point\');
                }
                )->get(array(\'id\',DB::raw(\'CONCAT(first_name, " ", last_name) AS full_name\')))', 'label' => 'Focal Point'),
    'master_trainer_id'         => array('query' => 'User::whereHas(
                    \'roles\', function($q){
                    $q->where(\'name\',\'master_trainer\');
                }
                )->get(array(\'id\',DB::raw(\'CONCAT(first_name, " ", last_name) AS full_name\')))', 'label' => 'Master Trainer'),
    'stage_id'                  => array('query' => 'Stage::all(\'id\',\'no\')', 'label' => 'Stage'),
    'stream_id'                 => array('query' => 'Stream::all(\'id\',\'no\')', 'label' => 'Stream'),
    'unit_id'                   => array('query' => 'Unit::all(\'id\',\'no\')', 'label' => 'Unit'),
);;
        if(count($resourceDropdowns) > 0){
            $dropDownFilters = array();
            foreach($resourceDropdowns as $drop_key => $drop_val){
                $dropDownFilters[$drop_key]['query'] = $drop_val['query'];
                $dropDownFilters[$drop_key]['label'] = $drop_val['label'];
            }

        }

但是$drop_val['query'] 没有运行，它只是最终数组中的一个字符串。

Answer 1

你也可以通过这种方式编写相同的代码。

$cources = App\Models\Course::all();
$users =  App\Models\User::whereHas(
                    'roles', function($q){
                    $q->where('name','course_coordinator');
                }
                )->get(array('id',DB::raw('CONCAT(first_name, " ", last_name) AS full_name')));

$my_eloquent_array = array('course' => $cources,
            'user' => $users
); 

return view('VIEW_NAME', ['data' => $my_eloquent_array]);

将$drop_val['query'] 替换为eval($drop_val['query'])

注意：- 当您使用 eval() 函数时，请始终将分号(;) 放在每个字符串的末尾。在你的情况下，你必须写

array('query'=>'App\Models\Course::all();');

如果此代码不起作用，请尝试以下方式：-

$arr = array('query'=>base64_encode(App\Models\Course::all()));
$user = base64_decode($arr['query']);

Answer 2

我不确定这是否有效，但您可以尝试一下。我会尝试存储函数并在循环它们时执行它：

// We store the queries with its associated parameters
$queries = [ ["query" => App\Models\Course::all, "params" => null ]];

// We loop over the functions to be executed
foreach($queries as $query){

    // Now, we execute the function
    $query["query"]($query["params"])->get();
}

我不确定此示例是否有效，但我会向您推荐这样的方法。

您必须考虑一个将复杂参数传递给函数的好解决方案。