Symfony 2 many to one

我正在学习符号2。在文档中，我看到了多对一关系的示例。我试着在我的代码中这样做。我有两个实体：产品和类别。

 /**
 * @ORM'ManyToOne(targetEntity="Category",inversedBy="products")
 * @ORM'JoinColumn(name="category_id", referencedColumnName="id")
 */
private $category;

在实体产品中，我有这样的代码。我执行了CCD_ 1和CCD_。表Category已经出现，但在表产品中我没有字段Category_id。我清除了缓存，但它不起作用。怎么了？

产品

<?php
namespace AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use AppBundle'Entity'Category;
/**
 * Product
 * @ORM'Entity
 * @ORM'Table(name="product")
 */
class Product
{
    /**
     * @ORM'Column(type="integer")
     * @ORM'Id
     * @ORM'GeneratedValue(strategy="AUTO")
     */
    private $id;
    /**
     * @ORM'Column(type="string",length=100)
     */
    private $name;
    /**
     * @ORM'Column(type="decimal", scale=2)
     */
    private $price;

    /**
     * @ORM'Column(type="text")
     */
    private $description;
    /**
     * @ORM'ManyToOne(targetEntity="Category", inversedBy="products")
     * @ORM'JoinColumn(name="category_id", referencedColumnName="id")
     */
    private $category;

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }
    /**
     * Set name
     *
     * @param string $name
     * @return Product
     */
    public function setName($name)
    {
        $this->name = $name;
        return $this;
    }
    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }
    /**
     * Set price
     *
     * @param integer $price
     * @return Product
     */
    public function setPrice($price)
    {
        $this->price = $price;
        return $this;
    }
    /**
     * Get price
     *
     * @return integer 
     */
    public function getPrice()
    {
        return $this->price;
    }
    /**
     * Set description
     *
     * @param string $description
     * @return Product
     */
    public function setDescription($description)
    {
        $this->description = $description;
        return $this;
    }
    /**
     * Get description
     *
     * @return string 
     */
    public function getDescription()
    {
        return $this->description;
    }
}

类别

<?php
namespace AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use Doctrine'Common'Collections'ArrayCollection;
/**
 * Category
 * @ORM'Entity
 * @ORM'Table(name="category")
 */
class Category
{
    /**
     * @ORM'Column(type="integer")
     * @ORM'Id
     * @ORM'GeneratedValue(strategy="AUTO")
     */
    private $id;
    /**
     * @ORM'Column(type="string", length=64)
     */
    private $name;
    /**
     * @ORM'OneToMany(targetEntity="Product", mappedBy="category")
     */
    private $products;
    public function __construct()
    {
        $this->products = new ArrayCollection();
    }

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }
    /**
     * Set name
     *
     * @param string $name
     * @return Category
     */
    public function setName($name)
    {
        $this->name = $name;
        return $this;
    }
    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }
}

UPD2在php应用程序''控制台原则之后：模式：更新--转储sql

 c:'xampp1'htdocs'first_project
# php app'console doctrine:schema:update --dump-sql
CREATE TABLE category (id INT AUTO_INCREMENT NOT NULL, name VARCHAR(255) NOT NUL
L, PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE =
InnoDB;
CREATE TABLE product (id INT AUTO_INCREMENT NOT NULL, name VARCHAR(128) NOT NULL
, price INT NOT NULL, description LONGTEXT NOT NULL, PRIMARY KEY(id)) DEFAULT CH
ARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB;
COMP323 c:'xampp1'htdocs'first_project
#