我使用symfony与FOSRestBundle为我的项目。我用自己的代码来做这个例子是为了降低复杂性。可能忘记重命名变量了
我在保存一篇只有一个类别的文章时遇到问题。这些类别已经存在于数据库中。我不想创建新的分类
我不确定做这项工作的最佳做法是什么。所以我尝试了几种方法并记录了错误消息(参见the Form-Type) 的实体class Article
{
private $id;
private $name;
/* this is ManyToOne */
private $category;
function getId() {/* ... */}
function setName($name) {/* ... */}
function getName() {/* ... */}
function setCategory(Category $cat) {/* ... */}
function getCategory() {/* ... */}
}
class Category
{
private $id;
private $name;
function getId() {/* ... */}
function setName($name) {/* ... */}
function getName() {/* ... */}
}
JSON POST
{
"name": "testName"
"category": {
"name": "nameOfAExistingCategory"
}
}
表单类型
class ArticleType extends AbstractType
{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
// here i tried out several ways of saving the category
->add('category')
// error-message
//Argument 1 passed to AppBundle\Entity\Article::setCategory() must be an instance of AppBundle\Entity\Category, array given, called in ...../vendor/symfony/symfony/src/Symfony/Component/PropertyAccess/PropertyAccessor.php on line 410 and defined",
// OR
->add('category', new CategoryType())
// error-message
// A new entity was found through the relationship 'AppBundle\Entity\Article#category' that was not configured to cascade persist operations for entity: AppBundle\Entity\Category@000000000c958844000000003bf8ec58. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). If you cannot find out which entity causes the problem implement 'AppBundle\Entity\Category#__toString()' to get a clue
// OR
->add('category', 'entity', array(
'class' => 'AppBundle:Category',
))
// error-message
// message":"category:n ERROR: This value is not valid
;
}
/* ... */
}
h2控制器 public function postAction(Request $request) {
$form = $this->createForm(
new ArticleType(),
new Article(),
array('method' => 'POST'));
$form->submit($request->request->all());
if (!$form->isValid()) {
throw new HttpException(Codes::HTTP_BAD_REQUEST, $form->getErrors(true, false));
}
$em = $this->getDoctrine()->getManager();
$article = $form->getData();
$em->persist($article);
$em->flush();
return $article;
}
public function postAction(Request $request) {
$form = $this->createForm(
new ArticleType(),
new Article(),
array('method' => 'POST'));
$form->submit($request->request->all());
if (!$form->isValid()) {
throw new HttpException(Codes::HTTP_BAD_REQUEST, $form->getErrors(true, false));
}
$em = $this->getDoctrine()->getManager();
$article = $form->getData();
$em->persist($article);
$em->flush();
return $article;
}
下面是工作示例:
的实体class Article
{
...
private $category;
...
function setCategory(Category $cat) {/* ... */}
function getCategory() {/* ... */}
}
class Category
{
private $id;
...
function getId() {/* ... */}
}
JSON POST
{
"name": "testName",
"category": 1
}
的表单类型public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('category', 'entity', [
'class' => CATEGORY_CLASS,
'property' => 'id'
])
;
}
控制器public function postAction(Request $request) {
$article = new Article();
$form = $this->createForm(
new ArticleType(),
$article,
array('method' => 'POST'));
$form->handleRequest($request);
if (!$form->isValid()) {
throw new HttpException(Codes::HTTP_BAD_REQUEST, $form->getErrors(true, false));
}
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$em->persist($article);
$em->flush();
return $article;
}
return $form;
}