laravel 一对一和一对多 eloquent 关系最佳实践

Question

想象以下要求：

足球队有三种类型的用户：老板、导师和足球运动员。

每个足球运动员都属于其中一支导师球队，而另一方面，导师可以指导多支球队。

我检测到团队和足球运动员之间存在一对一的关系，并且在用户 model 中定义的导师和团队之间存在许多关系，如下所示：

class User extends Authenticatable
{
    use HasApiTokens, HasFactory, Notifiable;

    public function team()
    {
        return $this->hasOne(Teams::class);
    }


    public function teams()
    {
        return $this->hasMany(Teams::class, 'mentor_id');
    }
}

并在团队 model

class Teams extends Model
{
    use HasFactory;


   public function user()
   {
       return $this->belongsTo(User::class, 'team_id'); // where team_id is a nullable column in users table for who has soccer player role
   }


   public function mentors()
   {
       return $this->belongsTo(User::class);
   }
}

我正在寻找制作模型和 eloquent 关系的最佳解决方案

Answer 1

对于我看到你的问题，我可以这样做。

团队表

| id  | mentor_id | owner_id |
|---- |-----------| ---------|

用户表

| id  | team_id |
|---- |---------|

team_id can be null for mentor and owner

团队模式

class Team extends Model
{
    use HasFactory;


   public function players()
   {
       return $this->hasMany(User::class); // where team_id is not null in users table for players
   }


   public function mentor()
   {
       return $this->belongsTo(User::class,'mentor_id'); //team mentor
   }

   public function owner()
   {
       return $this->belongsTo(User::class,'owner_id'); //team owner
   }
}

用户模式

class User extends Model
{
    use HasApiTokens, HasFactory, Notifiable;


   public function ownedTeams()
   {
       return $this->hasMany(Team::class,'owner_id'); // teams the user owns if owner
   }


   public function mentoredTeams()
   {
       return $this->hasMany(Team::class,'mentor_id'); //teams the user mentors if mentor
   }

   public function team()
   {
       return $this->belongsTo(Team::class); //team the user plays for if soccer player
   }
}

希望能帮助到你