以下是manyToMany关系中每个实体的yaml ORM定义,与documentation的第5.9节内联创建.

Rep\Bundle\ProjectBundle\Entity\User:
    type: entity
    table: User
    fields:
        id:
            id: true
            type: integer
            unsigned: true
            nullable: false
            generator:
                strategy: AUTO
        username:
            type: string
            length: 25
            fixed: false
            nullable: false
        salt:
            type: string
            length: 32
            fixed: false
            nullable: false
        password:
            type: string
            length: 40
            fixed: false
            nullable: false
        email:
            type: string
            length: 60
            fixed: false
            nullable: false
    manyToMany:
        roles:
            targetEntity: UserRole
            inversedBy: users
            joinTable:
                name: UserRoleLookup
                joinColumns:
                    user_id:
                        referencedColumnName: id
                inverseJoinColumns:
                    user_role_id:
                        referencedColumnName: id
    lifecycleCallbacks: {  }

和UserRole逆yaml配置：

Rep\Bundle\ProjectBundle\Entity\UserRole:
    type: entity
    table: UserRole
    fields:
        id:
            id: true
            type: integer
            unsigned: true
            nullable: false
            generator:
                strategy: AUTO
        name:
            type: string
            length: 50
            fixed: false
            nullable: false
    manyToMany:
        users:
            targetEntity: User
            mappedBy: roles
    lifecycleCallbacks: {  }

这是User表架构：

CREATE TABLE `User` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,`username` varchar(25) COLLATE utf8_unicode_ci NOT NULL,`salt` varchar(32) COLLATE utf8_unicode_ci NOT NULL,`password` varchar(40) COLLATE utf8_unicode_ci NOT NULL,`email` varchar(60) COLLATE utf8_unicode_ci NOT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

UserRole表架构：

CREATE TABLE `UserRole` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,`name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

和UserRoleLookup架构：

CREATE TABLE `UserRoleLookup` (
  `user_id` int(11) unsigned NOT NULL,`user_role_id` int(11) unsigned NOT NULL,PRIMARY KEY (`user_id`,`user_role_id`),KEY `user_role_id` (`user_role_id`),CONSTRAINT `userrolelookup_ibfk_2` FOREIGN KEY (`user_role_id`) REFERENCES `userrole` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,CONSTRAINT `userrolelookup_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

正如您所看到的,这是一个非常简单的设置,带有一个查找表来指定用户的角色或给定用户角色中的用户集.但是,我收到了这个令人沮丧的同步错误.我在这里或网上都没有读到任何简洁细节回答这个问题的内容,我希望有人可以澄清我是否可以安全地离开这个配置并忽略这个错误？