Symfony 3.4 没有元数据类来处理错误

Question

我已经安装了symfony 3.4和doctrine软件包

"php": ">=5.5.9",
        "doctrine/doctrine-bundle": "^1.8",
        "doctrine/doctrine-migrations-bundle": "^1.3",
        "doctrine/orm": "^2.5",
        "incenteev/composer-parameter-handler": "^2.0",
        "sensio/distribution-bundle": "^5.0.19",
        "sensio/framework-extra-bundle": "^5.0.0",
        "symfony/monolog-bundle": "^3.1.0",
        "symfony/polyfill-apcu": "^1.0",
        "symfony/swiftmailer-bundle": "^2.6.4",
        "symfony/symfony": "3.4.*",
        "twig/twig": "^1.0||^2.0"

使用以下命令创建数据库

php bin/console doctrine:database:create
G:XAMPPhtdocsproject>php bin/console doctrine:schema:validate
[Mapping]  OK - The mapping files are correct.
[Database] OK - The database schema is in sync with the mapping files.
G:XAMPPhtdocsproject>php bin/console doctrine:schema:validate
[Mapping]  OK - The mapping files are correct.
[Database] OK - The database schema is in sync with the mapping files.
G:XAMPPhtdocsproject>php bin/console doctrine:schema:update --force
No Metadata Classes to process.
G:XAMPPhtdocsproject>

每当我运行 php bin/console doctrine：schema：update --force 命令时，它都会抛出类似

没有要处理的元数据类。

我创建了文档中的实体类http://symfony.com/doc/3.4/doctrine.html

产品实体类

<?php
namespace AppBundleEntity;
use DoctrineORMMapping as ORM;
/**
 * @ORMEntity
 * @ORMTable(name="product")
 */
class Product
{
    /**
     * @ORMColumn(type="integer")
     * @ORMId
     * @ORMGeneratedValue(strategy="AUTO")
     */
    private $id;
    /**
     * @ORMColumn(type="string", length=100)
     */
    private $name;
    /**
     * @ORMColumn(type="decimal", scale=2)
     */
    private $price;

    /**
     * Get id
     *
     * @return int
     */
    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 int
     */
    public function getPrice()
    {
        return $this->price;
    }
}

Answer 1

是的，

最后我发现问题出在我运行John.orm.php时生成的文件php bin/console doctrine:generate:entity

我使用以下命令创建了实体类

php bin/console doctrine:generate:entity

然后它会提示

Welcome to the Doctrine2 entity generator
This command helps you generate Doctrine2 entities.
First, you need to give the entity name you want to generate.
You must use the shortcut notation like AcmeBlogBundle:Post.
The Entity shortcut name: AppBundle:John
Determine the format to use for the mapping information.
Configuration format (yml, xml, php, or annotation) [annotation]: php
Instead of starting with a blank entity, you can add some fields now.
Note that the primary key will be added automatically (named id).
Available types: array, simple_array, json_array, object,
boolean, integer, smallint, bigint, string, text, datetime, datetimetz,
date, time, decimal, float, binary, blob, guid.
New field name (press <return> to stop adding fields): id
 Field "id" is already defined.
New field name (press <return> to stop adding fields): username
Field type [string]: string
Field length [255]:
Is nullable [false]: true
Unique [false]: false
New field name (press <return> to stop adding fields): password
Field type [string]:
Field length [255]:
Is nullable [false]: true
Unique [false]:
New field name (press <return> to stop adding fields): dob
Field type [string]: date
Is nullable [false]: true
Unique [false]:
New field name (press <return> to stop adding fields):

  Entity generation

  created .srcAppBundle/Entity/John.php
  created .srcAppBundle/Resources/config/doctrine/
  created .srcAppBundle/Resources/config/doctrine/John.orm.php
> Generating entity class G:XAMPPhtdocsprojectsrcAppBundleEntityJohn.php:
 OK!
> Generating repository class G:XAMPPhtdocsprojectsrcAppBundleRepositoryJ
ohnRepository.php: OK!
> Generating mapping file G:XAMPPhtdocsprojectsrcAppBundleResourcesconfig
doctrineJohn.orm.php: OK!

  Everything is OK! Now get to work :).

G:XAMPPhtdocsproject>

成功后，它将在AppBundleEntity;文件夹中创建实体类，并在AppBundleRepository;中创建存储库类，还将在AppBundleResourcesconfigdoctrineJohn.orm.php中生成John.orm.php

删除 John.orm 后.php文件如果我运行php bin/console doctrine:schema:update --force那么它将生成表。

Answer 2

大多数情况下，此错误是由于实体路径问题和缓存而出现的。实体 php 文件必须位于您的特定文件夹中。通常我们通过命令生成实体：

 doctrine:generate:entity

首先运行命令

doctrine:cache:clear-metadata

然后尝试