Laravel 5.5 BelongsToMany 与枢轴条件

Question

我有三个模型，Clinic、Department 和 ClinicDepartment，并且使用 ClinicDepartment 的表作为数据透视表，从 Clinic 到 Department 的 belongsToMany 关系称为 departments，但是当我使用这种关系，ClinicDepartment 的范围不适用于查询。

我决定让 Pivot 模型调用 ClinicDepartmentPivot并将这些范围应用于 Pivot，但没有运气。

临床模型：

class Clinic extends Model
{
    use SoftDeletes, ActiveOnly, HasParent;

    public function departments()
    {
        return $this->belongsToMany(Department::class, 'clinic_departments', 'clinic_id', 'department_id')->using(ClinicDepartmentPivot::class);
    }
}

部门模型：

class Department extends Model
{
    use SoftDeletes, ActiveOnly;

    public function clinics()
    {
        return $this->belongsToMany(Clinic::class, 'clinic_departments', 'department_id', 'clinic_id')->using(ClinicDepartmentPivot::class);
    }
}

ClinicDepartmentPivot 模型：

class ClinicDepartmentPivot extends Pivot
{
    use ActiveOnly, SoftDeletes;
}

ActiveOnlyScope：

class ActiveOnlyScope implements Scope
{
    public function apply(Builder $builder, Model $model)
    {
        $builder->where($model->getTable() . '.is_active', true);
    }
}

所以基本上我想将全局范围应用于 Pivot 模型，所以当我尝试获取部门诊所时，它应该检查 - ClinicDepartment 是否有 is_active = 1 并且没有被删除。

UPD 1

我的作用域特征如下所示：

trait ActiveOnly
{
    public static function bootActiveOnly()
    {
        if (!Auth::guard('admin')->check() && strpos(request()->getRequestUri(), 'admin') === false) {
            static::addGlobalScope(new ActiveOnlyScope);
        }
    }
}

任何型号都可以使用。

Answer 1

好的，通过一些解决方法，我终于找到了一个看起来不那么杂乱的可行解决方案。

public function clinics()
    {
        return $this->belongsToMany(Clinic::class, 'clinic_departments', 'department_id', 'clinic_id')
            ->where(function (Builder $query) {
                $query->where('clinic_departments.is_active', 1)
                    ->whereNull('clinic_departments.deleted_at');
            });
    }

实际查询如下：

select `clinics`.*, `clinic_departments`.`department_id` as `pivot_department_id`, `clinic_departments`.`clinic_id` as `pivot_clinic_id` from `clinics` inner join `clinic_departments` on `clinics`.`id` = `clinic_departments`.`clinic_id` where (`clinic_departments`.`is_active` = 1 and `clinic_departments`.`deleted_at` is null)

感谢大家的意见。

Answer 2

你在这里遗漏了一些东西：

要将全局范围分配给模型，您应该覆盖给定的 模型的启动方法并使用addGlobalScope方法

Laravel Docs on scope

您的模型应如下所示：

class Clinic extends Model
{
    use SoftDeletes, ActiveOnly, HasParent;

    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope(new ActiveOnlyScope);
    }

    public function departments()
    {
        return $this->belongsToMany(Department::class, 'clinic_departments', 'clinic_id', 'department_id')->using(ClinicDepartmentPivot::class);
    }
}



class Department extends Model
{
    use SoftDeletes, ActiveOnly;

    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope(new ActiveOnlyScope);
    }

    public function clinics()
    {
        return $this->belongsToMany(Clinic::class, 'clinic_departments', 'department_id', 'clinic_id')->using(ClinicDepartmentPivot::class);
    }
}