Question

我正在尝试在Doctrine中的答案和问题表之间创建OneToMany关系。这些是基本的YAML模式

答案架构

  type: entity
  table: fs_answer
  fields:
    id:
      id: true
      type: integer
      unsigned: false
      nullable: false
      generator:
        strategy: IDENTITY
    questionId:
      type: integer
      unsigned: false
      nullable: false
      column: question_id
    body:
      type: text
      nullable: false
  oneToOne:
    question:
      targetEntity: FsQuestion
      cascade: {  }
      mappedBy: null
      inversedBy: null
      joinColumns:
    question_id:
      referencedColumnName: id
      orphanRemoval: false
  lifecycleCallbacks: {  }

问题架构：

  type: entity
  table: fs_question
  fields:
    id:
      id: true
      type: integer
      unsigned: false
      nullable: false
      generator:
        strategy: IDENTITY
    body:
      type: text
      nullable: false
  oneToMany:
    answer:
      targetEntity: FsAnswer
      cascade: {  }
      mappedBy: question
      inversedBy: answers
      joinColumns:
    question_id:
      referencedColumnName: id
      orphanRemoval: false
  lifecycleCallbacks: {  }

当我使用doctrine:schema:update更新架构时，它会生成下面的SQL代码并将unique key放入答案表中的'question_id'。

CREATE TABLE IF NOT EXISTS `fs_answer` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `question_id` int(11) NOT NULL,
  `body` longtext NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `UNIQ_552D082B1E27F6BF` (`question_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;

如何避免这种独特的关键内容？逻辑上（一对多）答案表中的问题ID不应该是唯一键。

Answer 1

实际上它就像下面的代码一样简单

问题：

oneToMany:
  answer:
    targetEntity: FsAnswer
    mappedBy: question
    cascade: ["persist"]

答案：

manyToOne:
  question:
    targetEntity: FsQuestion
    inversedBy: answer

Answer 2

每个答案只有一个问题吗？您将其定义为oneToOne类型的事实证实了这一点。

看起来你的joinColumn东西搞砸了。感到惊讶的是它没有引起错误。

查看学说手册中的示例：

http://docs.doctrine-project.org/projects/doctrine-orm/en/2.1/reference/association-mapping.html

在关系学说中生成唯一键

2 个答案: