【发布时间】：2018-05-24 02:49:21
【问题描述】：
我想从现有数据库中创建我的实体，它是一个 N - N 关系，它创建了 articleCategories 表。
我目前有 2 个实体，Article 和 Category，我想要一个多对多双向关系。
但是当我尝试使用 findByXXX 或 findOneByXXX 方法获取文章或类别时，我的 ManyToMany 属性为 NULL 或者我有 ORM 异常：Entity 'App\Models\Article' 有没有字段“类别”。因此，您不能在实体的存储库中调用“findByCategories”
数据库：
表格文章：idArticle, name, description, priceHT, size
表格类别：idCategory, name, percentTaxe
表格文章类别：idArticle、idCategory
实体：
类别
/**
* @Entity
* @Table(name="category")
*/
class Category
{
/**
* @var integer
*
* @Id
* @Column(name="idCategory", type="integer", nullable=false)
* @GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
* @Column(name="name", type="string", length=45, nullable=false)
*/
private $name;
/**
* @var string
* @Column(name="percentTaxe",type="decimal", precision=10, scale=0, nullable=false)
*/
private $percentTaxe;
/*
* Many categories have many articles
* @ManyToMany(targetEntity="App\Models\Article", inversedBy="categories")
* @JoinTable(name="articlesCategories",
* joinColumns={@JoinColumn(name="idCategory", referencedColumnName="idCategory")},
* inverseJoinColumns={@JoinColumn(name="idArticle", referencedColumnName="idArticle")}
* )
*/
private $articles;
/*Constructor*/
public function __construct(){
$toto = "toto";
var_dump($toto);
$this->articles = new ArrayCollection();
}
/***************************
Getters / Setters
****************************/
public function getId(){
return $this->id;
}
public function getName(){
return $this->name;
}
public function getPercentTaxe(){
return $this->percentTaxe;
}
public function getArticles(){
return $this->articles;
}
/************************/
public function setId($id){
$this->id = $id;
}
public function setName($name){
$this->name = htmlspecialchars($name);
}
public function setPercentTaxe($percentTaxe){
$this->percentTaxe = htmlspecialchars($percentTaxe);
}
public function setArticles(\Doctrine\Common\Collections\Collection $articles)
{
$this->articles = $articles;
}
/***************************
Getters / Setters
****************************/
public function addArticle(App\Models\Article $article)
{
var_dump($article);
$article->addCategory($this); // synchronously updating inverse side
$this->articles[] = $article;
}
文章
/**
* @Entity
* @Table(name="article")
*/
class Article
{
/**
* @var integer
*
* @Id
* @Column(name="idArticle", type="integer", nullable=false)
* @GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
* @Column(name="name", type="string", length=45, nullable=false)
*/
private $name;
/**
* @var string
* @Column(name="description",type="string", nullable=true)
*/
private $description;
/**
* @var string
* @Column(name="priceHT",type="decimal", precision=10, scale=3, nullable=false)
*/
private $priceHT;
/**
* @var string
* @Column(name="size", type="string", length=3, nullable=true)
*/
private $size;
/*
* Many articles have many categories
* @ManyToMany(targetEntity="App\Models\Category", inversedBy="articles")
* @JoinTable(name="articlesCategories",
* joinColumns={@JoinColumn(name="idArticle", referencedColumnName="idArticle")},
* inverseJoinColumns={@JoinColumn(name="idCategory", referencedColumnName="idCategory")}
* )
*/
private $categories;
/*Constructor*/
public function __construct(){
echo"tata";
$this->categories = new ArrayCollection();
echo"tata";
}
/***************************
Getters / Setters
****************************/
public function getId(){
return $this->id;
}
public function getName(){
return $this->name;
}
public function getDescription(){
return $this->description;
}
public function getPriceHT(){
return $this->priceHT;
}
public function getSize(){
return $this->size;
}
public function getCategories(){
return $this->categories;
}
/************************/
public function setId($id){
$this->id = $id;
}
public function setName($name){
$this->name = htmlspecialchars($name);
}
public function setDescription($description){
$this->description = htmlspecialchars($description);
}
public function setPriceHT($priceHT){
$this->priceHT = htmlspecialchars($priceHT);
}
public function setSize($size){
$this->size = htmlspecialchars($size);
}
public function setCategories($categories){
$this->categories = $categories;
}
/***************************
Getters / Setters
****************************/
public function addCategory(App\Models\Category $category)
{
$category->addArticle($this); // synchronously updating inverse side
$this->categories[] = $category;
}
/************************/
public function hydrate($data)
{
foreach($data as $key => $value)
{
// Get back the setter name wich correspond to the attribute
$method = 'set'.ucfirst($key);
// if the good setter exist.
if(methodexists($this, $method))
{
$this->$method($value);
}
}
}
}
经理
/**
* @param category : category of article we want
* @return an array of Article object or null
*/
public function getArticlesByCategory($categoryName)
{
$articles = NULL;
$repository = $this->getEntityManager()->getRepository("App\Models\Category");
$category = $repository->findOneByName($categoryName);
var_dump($category);
if($category != NULL)
{
$articles = $category->getArticles();
}
return $articles;
}
当我 var_dump 我的 $category 时，我有：class App\Models\Category#122 (4) { private $id => int(2) private $name => string(7) "clothes"私人 $percentTaxe => string(2) "20" 私人 $articles => NULL }
由于Doctrine create instances of mapped entities without invoking constructor，我发现我的类别和文章为空而不是空数组，但我不明白为什么它没有填充它。
我只使用 Doctrine2，我不使用 symfony。
【问题讨论】：
标签： php doctrine-orm orm