Question

我正在学习symfony 2.在文档中，我看到了多个对一个关系的例子。我尝试在我的代码中执行此操作。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app\console doctrine:generate:entities AppBundle和app\console doctrine:schema:update --force。表类别有外观，但在表格产品中我没有字段category_id。我清除了缓存，但它没有工作。有什么问题？

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;
    }
}

分类

<?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;
    }
}

php app \ console doctrine后面的

UPD2 ：schema：update --dump-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
#

Answer 1

请在注释中尝试使用对Category实体的完整命名空间引用。

/**
   *@ORM\ManyToOne(targetEntity="AppBundle\Entity\Category",inversedBy="products")
   *@ORM\JoinColumn(name="category_id", referencedColumnName="id")
*/

Answer 2

这两个在symfony 2.8（lts）中为我工作。

使用php app/console doctrine:schema:update --force --dump-sql

更新您的数据库

我删除了您可以使用以下内容生成的getter和setter：

php app/console doctrine:generate:entities AppBundle:Product
php app/console doctrine:generate:entities AppBundle:Category

<强> Product.php

<?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;

<强> Category.php

<?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();
    }
}

上面的代码将生成以下SQL：

CREATE TABLE category (id INT AUTO_INCREMENT NOT NULL, name VARCHAR(64) NOT NULL, PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB;
CREATE TABLE product (id INT AUTO_INCREMENT NOT NULL, category_id INT DEFAULT NULL, name VARCHAR(100) NOT NULL, price NUMERIC(10, 2) NOT NULL, description LONGTEXT NOT NULL, INDEX IDX_D34A04AD12469DE2 (category_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB;
ALTER TABLE product ADD CONSTRAINT FK_D34A04AD12469DE2 FOREIGN KEY (category_id) REFERENCES category (id);

Answer 3

在您的产品实体中添加以下代码，然后为db和cache运行这些命令，然后您将在表中看到此列。（通过命令创建实体时无法创建映射，因此您可以手动为这些列创建变量。）

/**
 * @var categoryId
 *
 * @ORM\Column(name="category_id", type="integer" , nullable = false)
 */
private $categoryId;

Symfony 2多对一

3 个答案: