我尝试在symfony中使用editAction，但是如果不更改输入文件，则会出错，它将数据库中的字段文件更新为null ...如果在更新操作中未更改值，如何不更新字段文件
代码操作：
/**
* @Route("/babysitter/update/{id}", name="update_babysitter_by_admin")
*
* @param Request $request
* @param BabySitter $babySitter
* @ParamConverter("id", options={"id": "id"})
*
* @return mixed
*/
public function updateBabySitterAction(BabySitter $babySitter, Request $request){
$em= $this->getDoctrine()->getManager();
$form= $this->createForm(BabySitterType::class, $babySitter,['requiredFile'=> false]);
$form->handleRequest($request);
if($form->isSubmitted() && $form->isValid()){
if($babySitter->getPicture()->getDocument()){
$this->uploadDocument->upload($babySitter->getPicture(), $this->getParameter('pictures_directory'));
}
if($babySitter->getCriminalRecord()->getDocument()){
$this->uploadDocument->upload($babySitter->getCriminalRecord(), $this->getParameter('criminalRecord_director_babySitter'));
}
if($babySitter->getIdCards()){
$this->uploadDocument->uploadIdCard($babySitter->getIdCards(), $babySitter,$this->getParameter('idCard_directory'));
}
$em->persist($babySitter);
$em->flush();
$url = $this->generateUrl('info_babySitter',['id'=> $babySitter->getId()]);
$response = new RedirectResponse($url);
return $response;
}
return $this->render('admin/registerBabySitter.html.twig',[
'form'=> $form->createView()
]);
}
细枝：
{% trans_default_domain 'FOSUserBundle' %}
<div class="register-box" style="width:460px">
<div class="register-box-body">
<p class="login-box-msg">Register a new BabySitter</p>
{{ form_start(form, {'method':'post', 'attr': {'class': 'fos_user_registration_register', 'novalidate': 'novalidate'}}) }}
<div class="form-group has-feedback">
{{ form_widget(form.email,{'attr': {'class': 'form-control', 'placeholder': 'Email'}}) }}
{{ form_errors(form.email) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.firstName,{'attr': {'class': 'form-control', 'placeholder': 'FirstName'}}) }}
{{ form_errors(form.firstName) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.lastName,{'attr': {'class': 'form-control', 'placeholder': 'LastName'}}) }}
{{ form_errors(form.lastName) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.plainPassword.first,{'attr': {'class': 'form-control', 'placeholder': 'Password'}}) }}
{{ form_errors(form.plainPassword.first) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.plainPassword.second,{'attr': {'class': 'form-control', 'placeholder': 'Repeat Password'}}) }}
{{ form_errors(form.plainPassword.second) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.genre,{'attr': {'class': 'form-control', 'placeholder': 'Genre'}}) }}
{{ form_errors(form.genre) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.dateBirth,{'attr': {'class': 'form-control', 'placeholder': 'date Birthday'}}) }}
{{ form_errors(form.dateBirth) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.linkVideo,{'attr': {'class': 'form-control', 'placeholder': 'link Video'}}) }}
{{ form_errors(form.linkVideo) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.criminalRecord) }}
{{ form_errors(form.criminalRecord) }}
</div>
<div class="form-group has-feedback">
<ul id="idCard-fields-list"
data-prototype="{{ form_widget(form.idCards.vars.prototype)|e }}"
data-widget-tags="{{ '<li></li>'|e }}">
{{ form_row(form.idCards) }}
{% for idCardField in form.idCards %}
<li>
{{ form_errors(idCardField) }}
{{ form_widget(idCardField) }}
</li>
{% endfor %}
</ul>
<div class="row">
<button type="button"
class="add-another-collection-widget-idCard btn btn-primary btn-flat"
data-list="#idCard-fields-list">Add another idCard</button>
</div>
</div>
<div class="form-group has-feedback">
{{ form_widget(form.nbrYears,{'attr': {'class': 'form-control', 'placeholder': 'Number Years'}}) }}
{{ form_errors(form.nbrYears) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.rib,{'attr': {'class': 'form-control', 'placeholder': ' rib'}}) }}
{{ form_errors(form.rib) }}
</div>
<div class="form-group has-feedback">
{{ form_widget(form.presentation,{'attr': {'class': 'form-control', 'placeholder': 'presentation'}}) }}
{{ form_errors(form.presentation) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.adress) }}
{{ form_errors(form.adress) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.availability) }}
{{ form_errors(form.availability) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.assignement) }}
{{ form_errors(form.assignement) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.qualification) }}
{{ form_errors(form.qualification) }}
</div>
<div class="form-group has-feedback">
{{ form_row(form.picture) }}
{{ form_errors(form.picture) }}
</div>
<div class="form-group has-feedback">
<ul id="language-fields-list"
data-prototype="{{ form_widget(form.languages.vars.prototype)|e }}"
data-widget-tags="{{ '<li></li>'|e }}">
{{ form_widget(form.languages) }}
{% for languageField in form.languages %}
<li>
{{ form_errors(languageField) }}
{{ form_widget(languageField) }}
</li>
{% endfor %}
</ul>
<div class="row">
<button type="button"
class="add-another-collection-widget btn btn-primary btn-flat"
data-list="#language-fields-list">Add another language</button>
</div>
</div>
<div class="row">
<div class="col-xs-12">
<input type="submit" class="btn btn-primary btn-block btn-flat" value="{{ 'registration.submit'|trans }}">
</div>
<!-- /.col -->
</div>
{{ form_rest(form) }}
{{ form_end(form) }}
</div>
<!-- /.form-box -->
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
jQuery(document).ready(function () {
jQuery('.add-another-collection-widget').click(function (e) {
var list = jQuery(jQuery(this).attr('data-list'));
// Try to find the counter of the list or use the length of the list
var counter = list.data('widget-counter') | list.children().length;
// grab the prototype template
var newWidget = list.attr('data-prototype');
// replace the "__name__" used in the id and name of the prototype
// with a number that's unique to your emails
// end name attribute looks like name="contact[emails][2]"
newWidget = newWidget.replace(/__name__/g, counter);
// Increase the counter
counter++;
// And store it, the length cannot be used if deleting widgets is allowed
list.data('widget-counter', counter);
// create a new list element and add it to the list
var newElem = jQuery(list.attr('data-widget-tags')).html(newWidget);
newElem.appendTo(list);
addTagFormDeleteLink(newElem);
});
function addTagFormDeleteLink($tagFormLi) {
var $removeFormButton = $('<button class="btn btn-danger btn-flat" style="margin-top:2%;margin-left:50%" type="button">Delete this Language</button>');
$tagFormLi.append($removeFormButton);
$removeFormButton.on('click', function(e) {
// remove the li for the tag form
$tagFormLi.remove();
});
}
jQuery('.add-another-collection-widget-idCard').click(function (e) {
var list = jQuery(jQuery(this).attr('data-list'));
// Try to find the counter of the list or use the length of the list
var counter = list.data('widget-counter') | list.children().length;
// grab the prototype template
var newWidget = list.attr('data-prototype');
// replace the "__name__" used in the id and name of the prototype
// with a number that's unique to your emails
// end name attribute looks like name="contact[emails][2]"
newWidget = newWidget.replace(/__name__/g, counter);
// Increase the counter
counter++;
// And store it, the length cannot be used if deleting widgets is allowed
list.data('widget-counter', counter);
// create a new list element and add it to the list
var newElem = jQuery(list.attr('data-widget-tags')).html(newWidget);
if(counter <= 3){ newElem.appendTo(list); }
});
function addIdCardFormDeleteLink($tagFormLi) {
var $removeFormButton = $('<button class="btn btn-danger btn-flat" style="margin-top:2%;margin-left:50%" type="button">Delete this idCard</button>');
$tagFormLi.append($removeFormButton);
$removeFormButton.on('click', function(e) {
// remove the li for the tag form
$tagFormLi.remove();
});
}
});
</script>
当我更新实体而不更新字段文件时，我的字段文件在数据库中为空...如何在不更改输入文件的情况下更新实体