Question

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“会员”，“主持人”，“管理员”等。我还想跟踪他/她何时加入网络。现在，我正在寻找的是使用Doctrine检索这些额外字段的有效方法。典型但非常简化的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 = ?');

所以，鉴于我有一个来自会员关系的用户，有什么方法可以“回溯”到NetworkMembers关系并获取额外的字段？
< / LI>
如果没有，我如何重新安排我的架构以使我能够有效地执行此操作？

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

我的问题的代码插图：

$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?
}

下面的架构：

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

Answer 1

我自己得到了它，只需采取一种略微不同的方法：

// 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
}

在多对多关系表中查找额外列

1 个答案: