dsvtnz6350 2019-04-01 14:24
浏览 36

无法在doctrine上删除具有继承的实体

With this two entities

Entity\AbstractSurveyAnswer:
    type: entity
    table: survey_answers
    inheritanceType: JOINED
    discriminatorColumn:
        name: type_class
        type: string
    discriminatorMap:
        database: SurveyDatabaseAnswer
        client_text: SurveyClientTextAnswer
        client_number: SurveyClientNumberAnswer
        client_date: SurveyClientDateAnswer

    id:
        id:
            type: integer
            generator:
                strategy: AUTO

    manyToOne:
        client:
            targetEntity: Entity\Client
            joinColumn:
                name: id_client
                nullable: false
                referenceColumnName: id

        survey:
            targetEntity: Entity\AbstractSurvey
            joinColumn:
                name: id_survey
                nullable: false
                referenceColumnName: id

and

Entity\AbstractSurveyAnswer:
    type: entity
    table: survey_answers
    inheritanceType: JOINED
    discriminatorColumn:
        name: type_class
        type: string
    discriminatorMap:
        database: SurveyDatabaseAnswer
        client_text: SurveyClientTextAnswer
        client_number: SurveyClientNumberAnswer
        client_date: SurveyClientDateAnswer

    id:
        id:
            type: integer
            generator:
                strategy: AUTO

    manyToOne:
        client:
            targetEntity: Entity\Client
            joinColumn:
                name: id_client
                nullable: false
                referenceColumnName: id

        survey:
            targetEntity: Entity\AbstractSurvey
            joinColumn:
                name: id_survey
                nullable: false
                referenceColumnName: id

and I try to remove an entity with this code

$to_delete_answer = new SurveyDatabaseAnswer();
$to_delete_answer->setId($answer);
$storage->remove($to_delete_answer);//calls EntityManagger::remove
$storage->flush();

But I get the followint error message

Detached entity \Entity\\SurveyDatabaseAnswer@00000000204763e700007fdd1d66d304 cannot be removed

I don't know what is wrong with delete this entities,not tryng trying to remove ant table referenced on another table.It's someething due the inheritance type?I'm noob on doctrine and I can't see the problem

  • 写回答

1条回答 默认 最新

  • drzb7969753 2019-04-29 15:18
    关注

    I think your problem is that your entity $to_delete_answer is not "merged", so your EntityManager cannot handle it. Try to add $storage->merge($to_delete_answer); before removing your entity:

    $to_delete_answer = new SurveyDatabaseAnswer();
    $to_delete_answer->setId($answer);
    $storage->merge($to_delete_answer);
    $storage->remove($to_delete_answer);//calls EntityManagger::remove
    $storage->flush();
    

    See : https://www.doctrine-project.org/projects/doctrine-orm/en/2.6/reference/working-with-objects.html#merging-entities

    评论

报告相同问题?

悬赏问题

  • ¥20 Python安装cvxpy库出问题
  • ¥15 用前端向数据库插入数据,通过debug发现数据能走到后端,但是放行之后就会提示错误
  • ¥15 python天天向上类似问题,但没有清零
  • ¥30 3天&7天&&15天&销量如何统计同一行
  • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
  • ¥15 C#调用python代码(python带有库)
  • ¥15 矩阵加法的规则是两个矩阵中对应位置的数的绝对值进行加和
  • ¥15 活动选择题。最多可以参加几个项目?
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题