Question

我正在尝试在我的项目中创建某种条件范围，但无法弄清楚如何处理它。

我有医疗实践，而且是医生。

    class Practice < ActiveRecord::Base
        has_many :doctors, -> { where removed_at: nil }
    end

    class Doctor < ActiveRecord::Base
        scope :with_all_doctors, -> {includes(:practice).where.not removed_at: nil}       
        belongs_to :practice
    end

现在我希望能够找到一些练习和所有医生，以及只有活跃医生的练习（removed_at == nil）

我正在努力实现以下目标：

    doctor = Doctor.find(id: params[:id]) #here we are fetching object hierarchy 
#with only active doctors of practice 
#(doctor.practice.doctors will give only active users)

    doctor = Doctor.with_all_doctors.find(id: params[:id]) #here we need to fetch object hierarchy 
#with all doctors of practice 
#(doctor.practice.doctors will give both active and removed doctors)

我非常感谢解决方案。

Answer 1

我认为你的情况很复杂。为什么不这样呢？

class Practice < ActiveRecord::Base
  has_many :doctors
end

class Doctor < ActiveRecord::Base
  belongs_to :practice

  scope :active, -> { where :removed_at => nil }
  scope :inactive, -> { where("removed_at is not null") }
end

这样，你可以docs = Practice.find(params[:id]).doctors让所有医生，然后docs.active或docs.inactive根据您的需要为活动和非活动医生。

ActiveRecord条件范围

1 个答案: