Laravel：一张桌子的多个模型

Question

我的目标：维护所有用户（代理、管理员、学生、教师或可以担任更多角色）在表中，但每个单独的模型/角色能够根据他们所拥有的角色引用同一表上的另一个 id $admins = Agent::with('agent')->get();

注意：我已经有表 roles 和 user_roles 工作得很好

users
===========
id
username
password
fullname

agent_student (one agent has many students but one student belongsTo one agent)
===========
id 
agent_id
student_id

admin_agent (one admin has many agents but one agent belongsTo one admin)
===========
id
admin_id
agent_id

app/Agent.php:

namespace App;

use Illuminate\Database\Eloquent\Model;

class Agent extends User
{
    protected $table = 'users';

    public function student()
    {
        return $this->hasMany('App\Student', 'id');
    }

    function agent_student()
    {
        return $this->hasMany('App\AgentStudent', 'id');
    }
}

app/Student.php：

namespace App;

use Illuminate\Database\Eloquent\Model;

class Student extends User
{
    protected $table = 'users';

    public function agent()
    {
        return $this->belongsTo('App\Agent', 'id');
    }

    public function agent_student()
    {
        return $this->hasOne('App\AgentStudent', 'student_id');
    }
}

app/AgentStudent.php:

namespace App;

use Illuminate\Database\Eloquent\Model;

class UserStudent extends Model
{
    protected $table = 'user_student';

    function student()
    {
        return $this->hasOne('App\Student', 'id');
    }

    function agent()
    {
        return $this->belongsTo('App\Agent', 'id');
    }
}

Answer 1

你为什么不让它成为一个自我参考？

class Agent extends Eloquent {

public function parent()
{
    return $this->belongsTo('App\Agent', 'parent_id');
}

public function children()
{
    return $this->hasMany('App\Agent', 'parent_id');
}
}