CakePHP 3.0 在非空字段上抛出“需要字段”错误

Question

我的 CakePHP 3.0 网站在不应该抛出错误时遇到了困难。我正在构建一个“添加页面”表单，如下所示：

echo $this->Form->create($newpage);
echo $this->Form->control('title');
echo $this->Form->control('content');
echo $this->Form->button('Save');
echo $this->Form->end();

标题和内容为必填项。提交表单后，“标题”用于生成页面“名称”，该页面当前只是小写的标题并删除了空格（因此“关于我们”将具有名称“关于我们”）。此名称也会被保存，但必须是唯一的（例如，如果您有标题为“No Space”和“NOSpace”的页面，即使标题是唯一的，它们也会以“nospace”结尾）。

我在PagesTable.php中有如下验证规则：

public function validationDefault(Validator $validator)
{
    $validator = new Validator();

    $validator
        ->requirePresence('title','content')
        ->lengthBetween('title', [0, 50])
        ->add(
            'name',
            ['unique' => [
                'rule' => 'validateUnique',
                'provider' => 'table',
                'message' => 'Not unique']
            ]
            );

    return $validator;

}

表单被提交给控制器，其中包含：

public function add($mainpage_id = null) {
    $newpage = $this->Pages->newEntity();

    if ($this->request->is('post')) {
        $newpage = $this->Pages->patchEntity($newpage, $this->request->data);
        // Get page name by removing spaces from title
        $name = strtolower(str_replace(' \'\"', '', $newpage->title));
        // Get navigation order by getting number of current siblings, and adding 1
        $siblings = $this->Pages->find('all')
                                ->where(['parent_id' => $newpage->parent_id])
                                ->count();
        $nav_order = $siblings + 1;
        $newpage = $this->Pages->patchEntity($newpage, ['name' => $name, 'nav_order' => $nav_order]);
        if ($newpage->errors()) {
            $errors = $newpage->errors();
            if(isset($errors['name'])) {
                $this->Flash->error('The title you have entered is too similar to one that already exists. To avoid confusion, please choose a different title.');
            }else {
                $this->Flash->error('Please correct errors below');
            }
        }else {
            $this->Pages->save($newpage);
            $page_id = $newpage->id;
            $this->Flash->success('Page created');
            return $this->redirect('/admin/pages/index');
            exit;
        }
    }

    $this->set(compact('newpage'));
    $this->set('_serialize', ['newpage']);
}

但是，当我尝试提交页面时，即使我输入了标题，我也会在标题字段中看到“此字段为必填项”。实际上，它不会让我在不输入标题的情况下提交表单（弹出一条消息说“填写此字段”），但是它会抛出错误。

谁能看出我做错了什么？

Answer 1

代码库看起来不错。但是，这可能不是明显的行为：calling patch entity method validate the passed patch data。 所以你的补丁第一次在这里验证：

$newpage = $this->Pages->patchEntity($newpage, $this->request->data);

第二次在这里验证：

$newpage = $this->Pages->patchEntity($newpage, ['name' => $name, 'nav_order' => $nav_order]);

并且由于第二个补丁没有标题，因此验证器说它错过了。要解决此问题，您需要使用所有数据运行一次补丁，即：

    $data = $this->request->data();
    // Get page name by removing spaces from title
    $data['name'] = strtolower(str_replace(' \'\"', '', $data['title']));
    // Get navigation order by getting number of current siblings, and adding 1
    $siblings = $this->Pages->find('all')
                            ->where(['parent_id' => $data['parent_id']])
                            ->count();
    $data['nav_order'] = $siblings + 1;
    $newpage = $this->Pages->patchEntity($newpage, $data);

希望你理解这个想法，它会有所帮助。

更新：刚刚注意到请求中可能没有 parent_id...您可以将此逻辑移动到 PagesTabe 中的 afterSave 回调中：

public function afterSave(Event $event, EntityInterface $entity) {
    $siblings = $this->count()
        ->where(['parend_id '=> $entity->parent_id]);
    // updateAll won't trigger the same hook again
    $this->updateAll(
            ['nav_order' => ++$siblings],
            ['id' => $entity->id]
    );
}