Cakephp 3 Jsonview和AdminLTE

Question

我正在使用当前的Cakephp 3.6.3和via composer additional

composer require maiconpinto/cakephp-adminlte-theme 

在Maicon Pinto的教程中描述了如何设置控制器和视图。到目前为止一切都很好。现在我正试着在我的网站上通过ajax使用json。route.php中的所有扩展都是按照https://book.cakephp.org/3.0/en/views/json-and-xml-views.html中的说明进行的

在我使用的控制器中

$this->loadComponent('RequestHandler'); 

包括在内。

我现在的问题是，总是会抛出一个MissingTemplateException：

Error: The view for NameController::action() was not found. 

下面是调试站点输出的一部分：

response => object(Cake\Http\Response) {

    'status' => (int) 200,
    'contentType' => 'application/json',
    'headers' => [
        [maximum depth reached]
    ],
    'file' => null,
    'fileRange' => [[maximum depth reached]],
    'cookies' => object(Cake\Http\Cookie\CookieCollection) {},
    'cacheDirectives' => [[maximum depth reached]],
    'body' => ''

}
paginate => []
components => []
View => object(AdminLTE\View\AdminLTEView) {
    Blocks => object(Cake\View\ViewBlock) {}
    plugin => null
    name => '<Modelname>'
    passedArgs => [
        [maximum depth reached]
    ]
    helpers => [[maximum depth reached]]
    templatePath => '<Modelname>'
    template => 'fill'
    layout => 'default'
    layoutPath => null
    autoLayout => true
    subDir => null
    theme => 'AdminLTE'
    hasRendered => false
    uuids => [[maximum depth reached]]
    request => object(Cake\Http\ServerRequest) {}
    response => object(Cake\Http\Response) {}
    elementCache => 'default'
    viewClass => null
    viewVars => [
        [maximum depth reached]
    ]
    Form => object(AdminLTE\View\Helper\FormHelper) {}
    [protected] _helpers => object(Cake\View\HelperRegistry) {}
    [protected] _ext => '.ctp'
    [protected] _passedVars => [
        [maximum depth reached]
    ]
    [protected] _paths => [
        [maximum depth reached]
    ]
    [protected] _pathsForPlugin => [[maximum depth reached]]
    [protected] _parents => [[maximum depth reached]]
    [protected] _current => null
    [protected] _currentType => ''
    [protected] _stack => [[maximum depth reached]]
    [protected] _viewBlockClass => 'Cake\View\ViewBlock'
    [protected] _eventManager => object(Cake\Event\EventManager) {}
    [protected] _eventClass => 'Cake\Event\Event'
    [protected] _viewBuilder => null
}

那么，Cakephp没有请求模板，而是使用文档中所预见的普通JsonView，那么缺少什么呢？看起来，框架已经正确地检测到了JSON数据，并且还想发出一个JSON响应。我还尝试将操作中的viewBuilder设置为

$this->viewBuilder('Json');

百无所成。

Answer 1

我通过更改beforeRender中的类名找到了解决方案：

public function beforeRender(\Cake\Event\Event $event) {
    parent::beforeRender($event);
    if ($this->getRequest()->is('ajax') || $this->getRequest()->is('json')){
        $this->viewBuilder()->setClassName('Json');
    }
}

现在我得到了正确的格式。