我在遵循 Symfony 食谱以添加/删除表单集合时遇到了问题。请参阅:http ://symfony.com/doc/current/cookbook/form/form_collections.html
现在,由于某种原因,如果我动态添加表单行但不填写任何字段,我会收到以下错误:
ContextErrorException: Catchable Fatal Error: Argument 1 passed to Project::addTask() must be an instance of Task, null given in D:\web_workspace\wedding\src\testapp.php line 82
我希望人们能够在表单中有空白行,而这些空白行会被忽略。例如,如果您单击“添加任务”几次,但没有填写最后一行,则表单仍应提交,并且应忽略最后一行。
我创建了一个非常简单的 Silex 演示,它只适合几个文件。我将在这里突出显示,但完整的示例在这里,只需通过 composer 添加 Silex 即可运行:https ://gist.github.com/mattsnowboard/7065865
我有以下模型(只是Project
其中有描述和Task
s 集合)
class Task
{
protected $name;
public function getName()
{
return $this->name;
}
public function setName($name)
{
$this->name = $name;
return $this;
}
}
class Project
{
protected $description;
protected $tasks;
public function __construct()
{
$this->tasks = array();
}
public function getDescription()
{
return $this->description;
}
public function setDescription($description)
{
$this->description = $description;
return $this;
}
public function getTasks()
{
return $this->tasks;
}
public function addTask(Task $task)
{
if (!is_null($task) && !in_array($task, $this->tasks)) {
$this->tasks[] = $task;
}
return $this;
}
public function removeTask(Task $task)
{
if (!is_null($task)) {
$this->tasks = array_diff($this->tasks, array($task));
}
return $this;
}
}
我的表格如下
class TaskType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('name', 'text', array(
'required' => false
));
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => '\Task',
));
}
public function getName()
{
return 'task';
}
}
class ProjectType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('description', 'text', array())
->add('tasks', 'collection', array(
'type' => new TaskType(),
'allow_add' => true,
'by_reference' => false,
'allow_delete' => true,
'required' => false
))
->add('submit', 'submit')
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => '\Project',
));
}
public function getName()
{
return 'project';
}
}
控制器将一些测试数据添加到表单中,并在提交时打印数据:
$app->match('/', function (Request $request) use ($app) {
$project = new Project();
// dummy code
$task1 = new Task();
$task1->setName('A Task');
$project->addTask($task1);
// end dummy code
$form = $app['form.factory']->create(new ProjectType(), $project);
$form->handleRequest($request);
if ($form->isValid()) {
$data = $form->getData();
$debug = print_r($data, true);
echo $debug;
}
return $app['twig']->render('test.html.twig', array(
'form' => $form->createView(),
));
})
->method('GET|POST');
视图主要是这个,以及食谱中的 javascript 示例
{{ form_start(form) }}
{{ form_row(form.description) }}
<h3>Tags</h3>
<ul class="tasks" data-prototype="{{ form_widget(form.tasks.vars.prototype)|e }}">
{# iterate over each existing tag and render its only field: name #}
{% for task in form.tasks %}
<li>{{ form_row(task.name) }}</li>
{% endfor %}
</ul>
{{ form_widget(form.submit) }}
{{ form_end(form) }}
我只是错过了什么吗?这是一个错误吗?我觉得这个非常接近食谱的例子应该很容易工作......
更新:删除"allow_deleted"
实际上并不能解决此问题。