为什么 Doctrine 会造成一次大迁移？

Question

我创建了几个实体：

用户

namespace App\Models;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 * @ORM\Table(name="users")
 */
class User {

    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue
     */
    protected $id;

    /**
     * @ORM\Column(type="string", length=32, nullable=false)
     */
    protected $firstName;

    /**
     * @ORM\Column(type="string", length=32, nullable=false)
     */
    protected $lastName;

    /**
     * @ORM\Column(type="string", length=100, unique=true, nullable=false)
     */
    protected $userName;

    /**
     * @ORM\Column(type="string", length=100, unique=true, nullable=false)
     * @Assert\Email
     */
    protected $email;

    /**
     * @ORM\Column(type="string", length=500, nullable=false)
     */
    protected $password;

    /**
     * @ORM\Column(type="datetime", nullable=true)
     */
    protected $created_at;

    /**
     * @ORM\Column(type="datetime", nullable=true)
     */
    protected $updated_at;

    ...
}

图片

namespace App\Models;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 * @ORM\Table(name="images")
 * @ORM\HasLifecycleCallbacks
 */
class Image {

    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue
     */
    protected $id;

    /**
     * @ORM\ManyToOne(targetEntity="\App\Models\User")
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
     */
    protected $user_id;

    /**
     * @ORM\Column(type="datetime", nullable=true)
     */
    protected $created_at;

    /**
     * @ORM\Column(type="datetime", nullable=true)
     */
    protected $updated_at;

    /**
     * @ORM\Column(type="string", nullable=false)
     */
    protected $location;

    /**
     * @ORM\Column(type="integer", nullable=false)
     */
    protected $imageSize;

    ....
}

当我运行 'vendor\bin\doctrine' migrations:diff 它继续并生成迁移。不过只有一次迁移...

迁移

namespace ImageUplaoder\Migrations;

use Doctrine\DBAL\Migrations\AbstractMigration;
use Doctrine\DBAL\Schema\Schema;

/**
 * Auto-generated Migration: Please modify to your needs!
 */
class Version20150430210959 extends AbstractMigration
{
    /**
     * @param Schema $schema
     */
    public function up(Schema $schema)
    {
        // this up() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('CREATE TABLE images (id INT AUTO_INCREMENT NOT NULL, user_id INT DEFAULT NULL, created_at DATETIME DEFAULT NULL, updated_at DATETIME DEFAULT NULL, location VARCHAR(255) NOT NULL, imageSize INT NOT NULL, INDEX IDX_E01FBE6AA76ED395 (user_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB');
        $this->addSql('CREATE TABLE users (id INT AUTO_INCREMENT NOT NULL, firstName VARCHAR(32) NOT NULL, lastName VARCHAR(32) NOT NULL, userName VARCHAR(100) NOT NULL, email VARCHAR(100) NOT NULL, password VARCHAR(500) NOT NULL, created_at DATETIME DEFAULT NULL, updated_at DATETIME DEFAULT NULL, UNIQUE INDEX UNIQ_1483A5E9586CA949 (userName), UNIQUE INDEX UNIQ_1483A5E9E7927C74 (email), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB');
        $this->addSql('ALTER TABLE images ADD CONSTRAINT FK_E01FBE6AA76ED395 FOREIGN KEY (user_id) REFERENCES users (id)');
    }

    /**
     * @param Schema $schema
     */
    public function down(Schema $schema)
    {
        // this down() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('ALTER TABLE images DROP FOREIGN KEY FK_E01FBE6AA76ED395');
        $this->addSql('DROP TABLE images');
        $this->addSql('DROP TABLE users');
    }
}

这不是我想要的，我想要单独的迁移。我不能一次创建多个实体然后运行某种命令来生成所有彼此独立的迁移吗？

Answer 1

首先，迁移工具只是一个工具。它并不意味着作为从版本生成路径的防弹方法。一般用作模板，手动修改。

具体回答你的问题，因为这个工具是专门用来比较整体架构的。考虑到实体之间存在关系，甚至无法评估单个实体。

虽然我不太理解您想要拆分迁移的原因。通常，这是一个孤注一掷的交易，因为您的应用程序需要一个单一版本（除非您的应用程序真的很聪明！）。

长话短说，它只是一个开发者工具，不能解决您的问题。

为什么 Doctrine 会造成一次大迁移？

why is Doctrine creating one big migration?

php

migration

doctrine

symfony

doctrine-orm

用户

图片

迁移