在详细视图yii2中将函数分配给值属性

Question

我试图在 DetailView 中将一个函数的值赋给 'value'。但是当我尝试这样做时，我得到了错误 "Object of class Closure could not be converted to string"

我也尝试通过将其分配给另一个变量来返回函数的值，但仍然出现相同的错误。

有人能帮我解决一下吗？

 <?= DetailView::widget([
    'model' => $model,
    'attributes' => [
        'Task_ID',
        'Task_Title',
        'Description',
        'projects.project_name', //display project name instead of project id
       // 'Assign_task_to',
        //'tasksemp.Employee_ID',
        [
            'attribute' => 'Assign_task_to',
            'format' => 'raw',

            $data = function ($model) {
                $assignEmpModel = Tasksemp::find()->where(['Task_ID' => $model->Task_ID])->all(); //get all the rows with teh same task_id
                $employes = ''; //empty string
                foreach ( $assignEmpModel as $employee ) {
                    $emp = Employee::find()->where(['Employee_ID'=>$employee->Employee_ID])->one(); //get all the employee_id 
                    $name = $emp['employee_name']; //get the employee_name from the employees table
                    $employes .= ' '.$name.', '; //concatenate the names.
                }
            //  return implode(', ',$employes);
            //return $employes;
            },
            'value' => $data,
        ],
        'start_date',
        'due_date',
        'priotiy_level',
        'upload_documents',
    ],
]) ?>

我试过将函数分配给变量 $data 但不起作用。

我也试过将函数直接分配给值，但同样的错误。

[
            'attribute' => 'Assign_task_to',
            'format' => 'raw',
            'value' => function ($model) {   //<----- ERROR HERE!
                $assignEmpModel = Tasksemp::find()->where(['Task_ID' => $model->Task_ID])->all(); //get all the rows with teh same task_id
                $employes = ''; //empty string
                foreach ( $assignEmpModel as $employee ) {
                    $emp = Employee::find()->where(['Employee_ID'=>$employee->Employee_ID])->one(); //get all the employee_id 
                    $name = $emp['employee_name']; //get the employee_name from the employees table
                    $employes .= ' '.$name.', '; //concatenate the names.

                }
                return $employes;
            },
      ],

像这样尝试过 Bizley 的解决方案：

<?php $assignEmpModel = Tasksemp::find()->where(['Task_ID' => $model->Task_ID])->all(); //get all the rows with teh same task_id
                $employes = ''; //empty string
                foreach ( $assignEmpModel as $employee ) {
                    $emp = Employee::find()->where(['Employee_ID'=>$employee->Employee_ID])->one(); //get all the employee_id 
                    $name = $emp['employee_name']; //get the employee_name from the employees table
                    $employes .= ' '.$name.', '; //concatenate the names.
?>

<?=  DetailView::widget([
    'model' => $model,
    'attributes' => [
        'Task_ID',
        'Task_Title',
        'Description',
        'projects.project_name', //display project name instead of project id
       // 'Assign_task_to',
        //'tasksemp.Employee_ID',
        [
            'attribute' => 'Assign_task_to',
            'format' => 'raw',
            'value' => $employes,
        ],
        'start_date',
        'due_date',
        'priotiy_level',
        'upload_documents',
    ],
]) ?>

但现在错误提示文件意外结束。

Answer 1

DetailView 不允许关闭该值，因为不需要它，因为 DetailView 在单个模型上运行（不会在 GridView 等许多模型上迭代）。

您的第一种方法非常糟糕，因为您试图在数组元素之间插入一些代码。第二种方法可以，但这里不允许关闭。

只需将作为 function ($model) 主体的代码（当然没有 return 部分）放在 <?= DetailView::widget(... 上方，然后使用 $employes里面的值的变量。

[
    'attribute' => 'Assign_task_to',
    'format' => 'raw',
    'value' => $employes,
],

Answer 2

您可以使用自定义函数在 DetailView 中获取值。

使用 call_user_func() 实现：

<?= \yii\widgets\DetailView::widget([
    'model' => $yourModel,
    'attributes' => [
        [
            'label' => 'Your label',
            'value' => call_user_func(function ($model) {
                // do what you like
                // return your value;
            }, $yourModel),
        ],
        // more attributes
    ]
]); ?>

在详细视图yii2中将函数分配给值属性

Assigning function to value attribute in details view yii2

php

yii2

yii2-advanced-app

detailview