Doctrine\DBAL\Schema\SchemaException：如何在声明的表索引中包含一个或多个 FK答案

【问题标题】：Doctrine\DBAL\Schema\SchemaException: How to include one or more FKs in a declared table indexDoctrine\DBAL\Schema\SchemaException：如何在声明的表索引中包含一个或多个 FK
【发布时间】：2016-05-14 12:39:54
【问题描述】：

我正在使用 Symfony/YaML/Doctrine 将数据存储在 MySQL 后端。我想使用我声明的一些 FK 创建一个索引（以加快查询速度）。但是，当我尝试生成架构时，出现以下错误：

[Doctrine\DBAL\Schema\SchemaException] 没有具有名称的列表“pms”上的“to_user_id”

当我注释掉索引声明时，我可以毫无问题地生成表。这是我的 YaML 文件的样子：

AppBundle\Entity\PrivateMessage:
    type: entity
    table: pms
    repositoryClass: PMSRepository
    id:
        id:
            type: integer
            generator: { strategy: AUTO }

    manyToOne:
        from_user:
            targetEntity: User
            joinColumn:
                name: from_user_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE

    manyToOne:
        to_user:
            targetEntity: User
            joinColumn:
                name: to_user_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE                

    manyToOne:
        message_type:
            targetEntity: PrivateMessageType
            joinColumn:
                name: pms_type_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE  


    manyToOne:
        message_status:
            targetEntity: PrivateMessageStatus
            joinColumn:
                name: pms_status_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE  

    indexes:
        idx_pms:
            columns: [from_user_id, to_user_id, created_at]          


    fields:
        subject:
            type: text
            nullable: false

        body:
            type: text
            nullable: false

        attach_1:
            type: string
            length: 128
            nullable: true

        attach_2:
            type: string
            length: 128
            nullable: true

        attach_3:
            type: string
            length: 128
            nullable: true

        created_at:
            type: datetime

【问题讨论】：

标签： symfony doctrine-orm yaml

【解决方案1】：

问题很简单：不要将所有关联拆分为几个manyToOne。正确的变体应该是这样的

AppBundle\Entity\PrivateMessage:
    type: entity
    table: pms
    repositoryClass: PMSRepository
    id:
        id:
            type: integer
            generator: { strategy: AUTO }

    manyToOne:
        from_user:
            targetEntity: User
            joinColumn:
                name: from_user_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE
        to_user:
            targetEntity: User
            joinColumn:
                name: to_user_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE                
        message_type:
            targetEntity: PrivateMessageType
            joinColumn:
                name: pms_type_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE  
        message_status:
            targetEntity: PrivateMessageStatus
            joinColumn:
                name: pms_status_id
                referencedColumnName: id
                nullable: false
                onDelete: RESTRICT
                onUpdate: CASCADE  

    indexes:
        idx_pms:
            columns: [from_user_id, to_user_id, created_at]          


    fields:
        subject:
            type: text
            nullable: false

        body:
            type: text
            nullable: false

        attach_1:
            type: string
            length: 128
            nullable: true

        attach_2:
            type: string
            length: 128
            nullable: true

        attach_3:
            type: string
            length: 128
            nullable: true

        created_at:
            type: datetime

【讨论】：

嘿嘿嘿，今天早上睡了一晚，我自己想通了！