Question

我有三种模式，汽车，服务和约会。

class Car < ApplicationRecord
  belongs_to :user
  has_many :appointments, dependent: :destroy
end

class Service < ApplicationRecord
  has_many :appointments
end

class Appointment < ApplicationRecord
  belongs_to :car
  belongs_to :service
  accepts_nested_attributes_for :service
end

我用简单的表格创建了引用服务的汽车的约会

<%= simple_form_for [@car, @appointment] do |a| %>
<%= a.input :date %>
<%= a.input :description, label: "descripción" %>
<%= a.input :location, label: "ubicación" %>
<%= a.association :service, as: :check_boxes, include_blank: false %>

<%= a.button :submit  %>
  <% end %>`

我的约会保存了正确的服务，但该服务的属性不正确

@car = Car.find(params[:car_id])
@appointment = Appointment.new(appointment_params)
@service = Service.new(params[ :service])

@appointment.service = @service
@appointment.car = @car

def appointment_params
  params.require(:appointment).permit(:date, :description, :location, :status, :requests, service_attributes:[:request, :price, :provider])
end

我认为问题出在参数上，但是我不确定，我不知道我是否正确保存了参数，service_attributes：[：request，：price，：provider]。

提前谢谢！（即使用滑轨5）

Answer 1

我认为您可能会对此进行错误处理。由于Service has_many :appointments和Appointment has_many :services（基于注释），因此您具有m：m关联，可以考虑使用has_many :through。像这样：

class Car < ApplicationRecord
  belongs_to :user
  has_many :appointments, dependent: :destroy
end

class AppointmentService < ApplicationRecord
  belongs_to :service
  belongs_to :appointment
end

class Service < ApplicationRecord
  has_many :appointment_services
  has_many :appointments, through: :appointment_services
end

class Appointment < ApplicationRecord
  belongs_to :car
  has_many :appointment_services
  has_many :services, through: :appointment_services
end

现在，您应该可以使用那部分参数进行操作了：

"service_id"=>["", "2", "3"]

要创建appointment_services（似乎您想丢弃该""）。您需要稍微摆弄一下，并且可以在accepts_nested_attributes_for :appointment_service上使用Appointment。

simple_form关联不保存属性

1 个答案: