Question

我有一个包含三列的表，即研究生id（grad_id），资格和主管。任务是找出每个主管有多少学生获得各种资格（博士，硕士，PGD，其他和总计）。问题是，在生成表格视图后，我无法过滤出主管人员的姓名，以查看他/她为各种资格类别监督的学生人数。

视图中的我的GridView如下所示：

GridView::widget([
    'dataProvider' => $sup,
     'filterModel' => $searchModel,
       'columns' => [
 ['class' => 'yii\grid\SerialColumn'],
        'supervisor',
        'total',
        'phd',
        'masters',
        'pgd',
        'other',
    ],
])

通过上述内容，我可以生成表格。但是过滤器不会更改表的内容，即使刷新页面并且页面Web URL更改为（当我搜索david时）：.../index.php?SupervisionSearch%5Bsupervisor%5D=david&SupervisionSearch%5Btotal%5D=&SupervisionSearch%5Bphd%5D=&SupervisionSearch%5Bmasters%5D=&SupervisionSearch%5Bpgd%5D=&r=student%2Fgrad-admissions%2Fsupervision

在SupervisionSearch类中，我尝试过：

public $supervisor;
public $phd;
public $masters;
public $pgd;
public $other;
public $total;

public function rules()
    {
        return [
            [['supervisor','phd', 'masters', 'pgd', 'other', 'total'], 'safe'],
            [['phd', 'masters', 'pgd', 'other', 'total'], 'number'],
            [['supervisor'], 'string'],
        ];
    }


  public function scenarios()
    {
        // bypass scenarios() implementation in the parent class
        return Model::scenarios();
    }


    public function search($params)
    {
$query = (new \yii\db\Query())
->select(["supervisor, sum(qualification = 'PhD') as phd", "sum(qualification = 'Masters') as masters", "sum(qualification = 'PGD') as pgd", "sum(qualification <> 'PhD' and qualification <> 'Masters' and qualification <> 'PGD')as other", "count(grad_id) as total"])
-> from('grad_students') 
-> where("supervisor <> ''")
-> orderBy('total desc')
-> groupBy('supervisor');

  $dataProvider = new ActiveDataProvider([
            'query' => $query,
        ]);
        $this->load($params);
        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
            // $query->where('0=1');
            return $dataProvider;
        }

    $query->andFilterWhere(['like', 'supervisor', $this->supervisor]); 
   return $dataProvider;
    }

我需要帮助，让过滤器搜索特定的主管名称，并显示他们为每个资格类别监督的学生人数。提前谢谢。

Answer 1

您的搜索功能您可以使用andFilterWhere代替where

public function search($params)
{
$query = (new \yii\db\Query())
->select(["supervisor, sum(qualification = 'PhD') as phd", 
  "sum(qualification = 'Masters') as masters",
  "sum(qualification = 'PGD') as pgd", 
     "sum(qualification <> 'PhD' 
        and qualification <> 'Masters' 
        and qualification <> 'PGD') as other", "count(grad_id) as total"])
-> from('grad_students') 
->andFilterWhere(['like', 'supervisor', $this->supervisor])
-> orderBy('total desc')
-> groupBy('supervisor');
.....

你应该删除模型中列的声明..你应该只声明计算的列别名，所以试试评论public $supervisor;

否则您的重新声明隐藏（重新定义）原始值并且无法正常工作

//public $supervisor;
public $phd;
public $masters;
public $pgd;
public $other;
public $total;

Answer 2

我通过一种解决方案获得了解决方案。我认为问题与原始问题中缺少主键有关。我现在做了什么，我首先在数据库中创建了一个视图，该视图也没有主键。然后我使用视图（而不是原始表）来生成带有GII的模型。接下来，我在模型中放置了一个primaryKey函数，然后使用GII CRUD生成所需的搜索模型，其搜索过滤器现在运行得非常好。这是我用来生成视图的代码（使用phpmyadmin的mysql）：

    var periodArray = new Array();
    var profitArray = new Array();
    var costArray = new Array();

    @forelse($salesanalysis as $analysis) 
    periodArray.push("{{\Carbon\Carbon::parse($analysis->created_at)->format($format)}}");
    profitArray.push("{{$analysis->total_profit}}");
    costArray.push("{{$analysis->total_cost}}");
    @empty
    @endforelse

这是我必须包含在SupervisorCount模型中以获取主键的代码：

create view supervisor_count as select supervisor, sum(qualification = 'PhD') as phd, sum(qualification = 'Masters') as masters, sum(qualification = 'PGD') as pgd, sum(qualification <> 'PhD' and qualification <> 'Masters' and qualification <> 'PGD')as other, count(grad_id) as total from  grad_students where supervisor <> '' group by supervisor order by count(grad_id) desc

如果没有主键，GII CRUD就无法运行。所以我在模型中使用了上面的primaryKey函数。但是当生成CRUD时，首先，表public static function primaryKey(){ return 'supervisor'; }的链接不起作用，抛出错误 /index.php?r=student%2Fsupervisor-count%2Findex。我通过在Gii上重新运行模型Getting unknown property: app\modules\student\models\SupervisorCount::p生成器解决了这个问题，它删除了我放在模型中的primaryKey函数。此后，链接正常工作。使用生成的SupervisorCount模型的GridView现在有一个适用于每个列的过滤器（Supervisor，Phd，Masters，Pgd，Other，Total）。

但是，我仍然想知道是否有更好的解决方案，或者使用原始表SupervisorCountSearch代替mysql生成的gradstudents视图的解决方案。

如何在Yii2 GridView中过滤有条件分组的数据

2 个答案: