Kohana的ORM的关系问题

Question

我有表：

users {id, name}
projects {id, name}
roles {id, name}
projects_users {id, user_id, project_id, role_id}

我有机型：

project { has many users through projects_users }
user { has many projects through projects_users }

<强>问题： 我如何获得用户的角色，一个项目？或者，也许我必须重建我的表？

代码：

$project = ORM::factory('project', $id);
$users = $project->users->find_all();
foreach ($users as $u) {
    $roles = $u-> .... How to get all roles for this user and for this project?
}

Answer 1

您project_users表似乎较上项目的角色，添加绑定在该表的另一种模式：

project_role { 
    has one user 
    has one role
    has one project
}
user {
    has many project_role
    ...
}
project {
    has many project_role
    ...
}

这时，你可能能够做到：

$user = ORM::factory('user')
    ->with('project_role')
    ->where('project_role.project_id', '=', $id)
    ->with('project_role:role')->findall();

如果不工作，下面应该工作之一，但可能会以不同的形式穿越到你以后。

$project = ORM::factory('project', $id);
$roles = $project->project_role->with('user')->with('role')->findall();

或者

$roles = ORM::factory('project_role')
    ->where('project_id', '=', $id)
    ->with('user')->with('role')->findall();