具有 Eager Loading 的 Eloquent 过滤集合

Question

我一直在网上寻找，但似乎无法弄清楚这一点。 我有两张桌子：Teams 和 TeamMembers。一个团队可以有一个或多个团队成员，因此它是一对多的关系。

这是两张表的基本情况：

   class Team extends Base\EloquentBase
       {
          // Relationship
          public function teamMembers()
          {
            return $this->hasMany('TeamClock\Eloquent\Models\TeamMember', 'team_id', 'team_id');
          }
       }

       class TeamMember extends Base\EloquentBase
       {
          // Relationship
          public function team()
          {
            return $this->belongsTo('TeamClock\Eloquent\Models\Team', 'team_id', 'team_id');
          
          // Scope
          public function scopeHasDailyPerDiem($q)
          {
            return $q->where('is_daily_per_diem', '>', 0);
          }
       }

如您所见，我在 TeamMember 类中有一个范围，我想获取所有团队成员的列“is_daily_per_diem”大于 0 的团队。

我有一个测试控制器，我正在输出结果：

$teams = Team::has('teamMembers')->with(array('teamMembers' => function($query){
                $query->hasDailyPerDiem();
        }))->get();

这是我倾销时得到的：

[0] => Array
        (
            [team_id] => 55
            [phase_id] => value
            [team_name] => value
            [team_member_quota] => value
            [team_member_overstaff] => value
            [published] => value
            [tools_required] => value
            [dress_code] => value
            [special_instructions] => value 
            [team_members] => Array
                (
                )

        )
...
[41] => Array
        (
            [team_id] => 115
            [phase_id] => value
            [team_name] => value
            [team_member_quota] => value
            [team_member_overstaff] => 0
            [published] => 1
            [tools_required] => 
            [dress_code] => 
            [special_instructions] => 
            [team_members] => Array
                (
                    [0] => Array
                        (
                            [team_member_id] => value
                            [team_id] => 115
                            [position_id] => value
                            [employee_id] => value
                            [team_auth_id] => 1
                            [progress_auth_id] => 2
                            [is_daily_per_diem] => 1
                            [daily_per_diem] => 60.00
                            [pay_type_id] => 1
                            [flat_rate] => 
                            [is_active] => 0
                            [per_diem_beg_date] => 
                            [per_diem_end_date] => 
                            [beg_shift_id] => 
                            [end_shift_id] => 
                            [assign_email_guid] => value
                        )

                )

        )

如您所见，我得到了包含团队成员的团队（即每日每日津贴 > 0）和团队成员为空的团队。

有没有办法消除空队成员的团队？

我还在我的测试控制器中尝试了这个和其他东西：

$teams = Team::whereHas('teamMembers', function($query){
            $query->hasDailyPerDiem();
        })->get(); 

但这会返回一个包含“每日津贴”大于零的所有团队成员的数组，但我没有得到任何团队信息：

[0] => Array
        (
            [team_id] => 55
            [phase_id] => value
            [team_name] => value
            [team_member_quota] => value
            [team_member_overstaff] => value
            [published] => value
            [tools_required] => value
            [dress_code] => value
            [special_instructions] => value
        )
...
 [36] => Array
        (
            [team_id] => 115
            [phase_id] => value
            [team_name] => value
            [team_member_quota] => value
            [team_member_overstaff] => value
            [published] => value
            [tools_required] => value
            [dress_code] => value
            [special_instructions] => value
        )

非常感谢任何帮助！！！

Answer 1

你快到了……

如果您想过滤团队和渴望加载成员：

$teams = Team::with('teamMembers')->whereHas('teamMembers', function($query){
             $query->hasDailyPerDiem();
         })->get(); 

如果您想过滤团队和急于加载的成员：

$teams = Team::with(['teamMembers' => function($query){
             $query->hasDailyPerDiem();
         }])->whereHas('teamMembers', function($query){
             $query->hasDailyPerDiem();
         })->get();

如果要使用第二个代码块减少重复代码，请将过滤器闭包放在一个变量中：

$filter = function($query){
    $query->hasDailyPerDiem();
};

$teams = Team::with(['teamMembers' => $filter])
             ->whereHas('teamMembers', $filter)
             ->get();

Answer 2

定义一个实现Scope接口的类

类 TeamFilterScope 实现范围{

     public function apply(Builder $builder, Model $model){
     $builder->hasDailyPerDiem()
    }
}

在你模特的靴子里

protected function static boot(){
    parent::boot();
    static::addGlobalScope(new TeamFilterScope());
}