在详细信息视图yii2中将功能分配给值属性 [英] Assigning function to value attribute in details view yii2

问题描述

我正在尝试在DetailView中将函数的值分配给值。但是，当我尝试得到错误无法将类Closure的对象转换为字符串时

I am trying to assign a value of a function to 'value' in DetailView. But when I try that I get the error "Object of class Closure could not be converted to string"

我尝试通过将其赋值给另一个变量来返回该函数的值

I tried returning the value of the function by assigning it to another variable too but still the same error.

有人可以帮我解决吗？

 <?= 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',
    ],
]) ?>

我尝试将函数分配给变量$ data，但不起作用。

I have tried assigning the function to a variable $data but doesn't work.

我也尝试将函数直接分配给值，但存在相同的错误。

I have tried assigning the function directly to the value as well but same error.

[
            '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;
            },
      ],

尝试过Bizley的解决方案，如下所示：

Tried Bizley's solution like this:

<?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',
    ],
]) ?>

但是现在错误提示文件意外结束。

But now the error says unexpected end of file.

推荐答案

DetailView不允许闭包该值，因为由于DetailView在单个模型上运行（在诸如GridView之类的许多模型上不会迭代），因此不需要此值。

DetailView doesn't allow closure for the value because there is no need for it since DetailView operates on single model (doesn't iterate on many models like GridView).

您的第一种方法完全不好，因为您尝试在数组元素之间插入一些代码。第二种方法是可以的，但是这里不允许闭包。

Your first approach is totally bad because you try to push some code between the array elements. Second approach is ok but no closure allowed here.

只需使用代码即可，该代码就是您的函数（$ model）的主体（当然不包含 return 部分），并将其置于<？= DetailView :: widget（... ，然后将 $ employes 变量用作内部值。

Simply just take the code that is the body of your function ($model) (of course without the return part) and put it above the <?= DetailView::widget(... and then use the $employes variable for the value inside.

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

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