有个问题 假如用户 id为1 的订单为空 那么Customer::findModel($id)->orders 也为空,view层该如何处理这种空？

爬啊爬怕怕！！Mark

我使用Yii2的基本应用程序模板安装完成yii2-admin后,查看路由只能看到admin下的路由列表
但是,路由列表中看不到app\controller下的控制器?请问为什么

module配置如下：

<?php
return  [ 
        'admin' => [
            'class' => 'mdm\admin\Module',
            'layout'=>'left-menu',
            'mainLayout' => '@app/views/layouts/main.php',
        ],
        
        'controllerMap' => [
            'assignment' => [
                'class' => 'mdm\admin\controllers\AssignmentController',
                /* 'userClassName' => 'app\models\User', */
                'idField' => 'user_id',
                'usernameField' => 'username',
                'fullnameField' => 'profile.full_name',
                'extraColumns' => [
                     [
                        'attribute' => 'full_name',
                        'label' => 'Full Name',
                        'value' => function($model, $key, $index, $column) {
                            return $model->profile->full_name;
                        },
                     ],
                     [
                     'attribute' => 'dept_name',
                     'label' => 'Department',
                         'value' => function($model, $key, $index, $column) {
                             return $model->profile->dept->name;
                            },
                     ],
                     [
                     'attribute' => 'post_name',
                         'label' => 'Post',
                             'value' => function($model, $key, $index, $column) {
                             return $model->profile->post->name;
                     },
                     ],
                 ],
                 'searchClass' => 'app\models\UserSearch'
                ],
         ], 
];

components配置如下

<?php
return 
    [
        'request' => [
            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
            'cookieValidationKey' => 'Owod8SuyH0Syh2pjYY6LYGIGvKtQLHAt',
        ],
        'cache' => [
            'class' => 'yii\caching\FileCache',
        ],
        'user' => [
            'identityClass' => 'app\models\User',
            'enableAutoLogin' => true,
        ],
    
        'urlManager'=>[
            'enablePrettyUrl' => true,
            'showScriptName' => false,//index.php
            ],
    
        'errorHandler' => [
            'errorAction' => 'site/error',
        ],
            'mailer' => [
                'class' => 'yii\swiftmailer\Mailer',
                // send all mails to a file by default. You have to set
                // 'useFileTransport' to false and configure a transport
            // for the mailer to send real emails.
            'useFileTransport' => true,
            ],
        'log' => [
                'traceLevel' => YII_DEBUG ? 3 : 0,
                'targets' => [
                    [
                        'class' => 'yii\log\FileTarget',
                        'levels' => ['error', 'warning'],
                ],
            ],
            ],
            'db' => require(__DIR__ . '/db.php'),
            //权限管理
            'authManager' => [
                'class' => 'yii\rbac\DbManager',
                'itemTable' => '{{%auth_item}}',
                'assignmentTable' => '{{%auth_assignment}}',
                'itemChildTable' => '{{%auth_item_child}}',
                "defaultRoles" => ["guest"],
        ],
        //样式管理
        'assetManager' => [
        'bundles' => [
            'dmstr\web\AdminLteAsset' => [
                'skin' => 'skin-blue',
            ],
            ],
        ],