yii2 get name instead of id

问题

hi i have this weird problem. i had a table relation. and i want to view the related table field name instead of id.

here is my model:

public function getQCat()
    {
        return $this->hasOne(QbCategory::className(), ['id' => 'q_cat']);
    }

here is my view:

<?php echo DetailView::widget([
        'model' => $model,
        'attributes' => [
            'q_cat',
            'question:ntext',
            'q_c1:ntext',
            'q_c2:ntext',
            'q_c3:ntext',
            'q_c4:ntext',
            'q_ans:ntext',
        ],
    ]) ?>

that 'q_cat' field in view i want to display name instead of id. i tried using 'q_cat.name' but it says (not set).

thanks.

回答1:

assuming you QbCategory model is

id
name 

and you want accessing to QbCategory value in your Main Class you could access to the attribute name in this way
in Main class

add relation

public function geQcat()
{
    return $this->hasOne(QbCategory::className(),
     ['id' =>   'qcat_id']);  // qcat_id is the column name in Main  class that join QCat to Main

then you can build a getter for for QbCategory name

public function getQcatname() {  
    return $this->qcat->name; // name is the name of name column in QCat 
}

then in your Main Clals Detail View

<?php echo DetailView::widget([
        'model' => $model,
        'attributes' => [
            'qcatname', // this i the ref for getQcatname function in Main Model
            'question:ntext',
            'q_c1:ntext',
            'q_c2:ntext',
            'q_c3:ntext',
            'q_c4:ntext',
            'q_ans:ntext',
        ],
    ]) ?>

回答2:

Easier solution

[
    'attribute' => 'q_cat',
    'value => $model->Qcat->qcat_name
]

来源：https://stackoverflow.com/questions/43927919/yii2-get-name-instead-of-id