Yii2-关键值不起作用

Question

我想与另一个模型中的一个模型相关联，但是出现了这个错误：

这是我从View指向的另一个模型

课程大师模型

    public function attributeLabels()
{
    return [
        'id' => Yii::t('course', 'ID'),
        'course_code' => Yii::t('course', 'Course Code'),
        'course_type' => Yii::t('course', 'Course Type'),
        'course_title' => Yii::t('course', 'Course Title'),
        'course_unit' => Yii::t('course', 'Course Unit'),           
    ];
}

 function getCourseCodes()
 {
    return ($this->course_code);
 }     

 function getCourseTitles()
 {
    return ($this->course_title);
 }   

 function getCourseTypes()
 {
    return ($this->course_type);
 }          

 function getCourseUnits()
 {
    return ($this->course_unit);
 }   

这是我要在视图中显示的主要模型

课程注册详细信息模型

    public function attributeLabels()
{
    return [
        'id' => Yii::t('course', 'ID'),
        'course_registration_id' => Yii::t('course', 'Course Registration'),
        'course_id' => Yii::t('course', 'Course Title'),
        'student_id' => Yii::t('course', 'Student'),
        'remark' => Yii::t('course', 'Remark'),

    ];
}

public function getCourseMaster()
{
    return $this->hasOne(CourseMaster::className(), ['id' => 'course_id']);
} 

我希望能够将数组索引用作$ key

查看

<tr>
		<td colspan=3 class="padding-left padding-right"> 
                <?php $totalUnit = 0; 
                $courseRegistrationDetails = \app\modules\course\models\CourseRegistrationDetail::find()->where(['course_registration_id' => $model->id])->asArray()->all(); ?>
                <table border="1" class="table table-border" style="width:100%;">
			<tr class="header">
				<th><?php echo Yii::t('report', 'SI.No'); ?></th>
				<th><?php echo Yii::t('report', 'Course Code'); ?></th>
				<th><?php echo Yii::t('report', 'Course Title'); ?></th>
				<th><?php echo Yii::t('report', 'Course Type'); ?></th>
				<th><?php echo Yii::t('report', 'Unit'); ?></th>
				<th><?php echo Yii::t('report', 'Remark'); ?></th>                                
			</tr> 
			<?php 
			foreach($courseRegistrationDetails as $key=>$value) {
				echo '<tr>';
				echo '<td class="text-center">'.($key+1).'</td>';	
				echo '<td class="text-center">'.$value->courseMasters->courseCodes.'</td>';
				echo '<td class="text-center">'.$value->courseMasters->courseTitles.'</td>';
				echo '<td class="text-center">'.$value->courseMasters->courseTypes.'</td>';
				echo '<td class="text-center">'.$value->courseMasters->courseUnits.'</td>';   
                                echo '<td class="text-center">'.$value['remark'].'</td>';
				echo '</tr>';
				$totalUnit+=$value['course_unit'];
			}
			?>    
			<tr>
				<th class="text-right border-hide padding-right" colspan=4><?php echo Yii::t('report', 'Total Unit'); ?></th>
				<th><?php echo $totalUnit; ?></th>
			</tr>                        
                </table>    
		</td>
	</tr>  

如何解决该错误并将数组索引用作$ key

Answer 1

查询

$courseRegistrationDetails = \app\modules\course\models\CourseRegistrationDetail::find()
    ->with('courseMaster')
    ->where(['course_registration_id' => $model->id])
    ->all();

查看

<?php foreach ($courseRegistrationDetails as $key => $value) : ?>
    <tr>
        <td class="text-center"> <?= ($key + 1) ?> </td>
        <td class="text-center"> <?= $value->courseMaster->courseCodes ?> </td>
        <td class="text-center"> <?= $value->courseMaster->courseTitles ?> </td>
        <td class="text-center"> <?= $value->courseMaster->courseTypes ?> </td>
        <td class="text-center"> <?= $value->courseMaster->courseUnits ?> </td>
        <td class="text-center"> <?= $value->remark ?> </td>
    </tr>
    <?php $totalUnit += $value->course_unit; ?>
<?php endforeach; ?>

使用asArray（）

查询

$courseRegistrationDetails = \app\modules\course\models\CourseRegistrationDetail::find()
    ->with('courseMaster')
    ->where(['course_registration_id' => $model->id])
    ->asArray()
    ->all();

查看

<?php foreach ($courseRegistrationDetails as $key => $value) : ?>
    <tr>
        <td class="text-center"> <?= ($key + 1) ?> </td>
        <td class="text-center"> <?= $value['courseMaster']['course_code'] ?> </td>
        <td class="text-center"> <?= $value['courseMaster']['course_title'] ?> </td>
        <td class="text-center"> <?= $value['courseMaster']['course_type'] ?> </td>
        <td class="text-center"> <?= $value['courseMaster']['course_unit'] ?> </td>
        <td class="text-center"> <?= $value['remark'] ?> </td>
    </tr>
    <?php $totalUnit += $value['course_unit']; ?>
<?php endforeach; ?>