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我希望通过在关联表中添加一些额外的字段来在多对多关系中保留一些额外的数据。例如，我想跟踪用户在网络中的角色，例如“成员”、“版主”、“管理员”等。我还想跟踪他/她何时加入网络。现在，我正在寻找一种使用 Doctrine 检索这些额外字段的有效方法。一个典型的但非常简化的 DQL 查询可能如下所示：

// find.network.by.slug
Doctrine_Query::create()
    ->select('*')
    ->from('Network n')
    ->leftJoin('n.Members u')
    ->where('n.slug = ?');

  1. 那么，鉴于我有一个来自 Members 关系的 User，有什么方法可以“回溯”到 NetworkMembers 关系并获取额外的字段？

  2. 如果没有，我如何重新安排我的架构以使我能够有效地做到这一点？

    （即我不想遍历成员必须找到我开始的网络并获取角色和 member_since 字段的所有网络）。

我的问题的代码说明：

$networkTable = Doctrine::getTable('Network');
$network = $networkTable->executeOne('find.network.by.slug', $slug);
$members = $network->Members;
foreach($members as $member) {
   // How do I access the fields in the NetworksMember association?
}

架构如下：

User:
  tableName: users
  columns:
    user_id:
      name: user_id as userId
      type: integer(8)
      unsigned: 1
      primary: true
      autoincrement: true
    username:
      type: string(30)
      notnull: true
      unique: true
  relations:
    Networks:
      class: Network
      local: user_id
      foreign: network_id
      refClass: NetworkMembers
      type: many

Network:
  tableName: networks
  actAs:
    Sluggable:
      unique: true
      fields: [name]
      canUpdate: true
    Timestampable:
  columns:
    id:
      type: integer(8)
      unsigned: 1
      primary: true
      autoincrement: true
    name:
      type: string(64)
      notnull: true
  relations:
    Members:
      class: User
      type: many
      refClass: NetworkMembers
      local: network_id
      foreign: user_id
      foreignAlias: Networks
      foreignType: many

NetworkMembers:
  actAs:
    Timestampable:
      created:
        name: member_since as memberSince
        type: timestamp
      updated:
        disabled: true
  columns:
    networkId:
      name: network_id as networkId
      type: integer(8)
      unsigned: 1
      primary: true
    userId:
      name: user_id as userId
      type: integer(8)
      unsigned: 1
      primary: true
    role:
      type: enum
      values: [member, moderator, admin]
      default: member
  relations:
    Network:
      type: one
      local: network_id
      foreign: id
    Member:
      class: User
      type: one
      local: user_id
      foreign: user_id
4

1 回答 1

3

我自己搞定了，只需要采取稍微不同的方法：

// find.network.by.slug
        Doctrine_Query::create()
            ->select('*')
            ->from('Network n')
            ->leftJoin('n.NetworkMembers nm')
            ->leftJoin('nm.Member u')
            ->leftJoin('n.Founder f')
            ->leftJoin('n.Icon icon')
            ->where('n.slug = ?')

// later:
$members = $this->network->NetworkMembers;
foreach($members as $networkMember) {
   echo $networkMember->Member->username;
   echo $networkMember->role; // Here I can access the 
                              // NetworkMember association directly
}
于 2009-09-03T11:50:36.460 回答