Rails has_many 通过join model undefined id: "undefined method `attributes' for #" 提交嵌套表单时

Question

我在尝试提交嵌套的 rails 表单时收到 'NoMethodError'。该表单用于创建预订和服务类型 - 预订（连接模型）。

我得到的错误是 "undefined method `attributes' for #"

这是我的预订模型：reservation.rb

module Booking
 class Reservation < ActiveRecord::Base
  has_many :service_type_reservations, inverse_of: :reservation, dependent: :destroy
  accepts_nested_attributes_for :service_type_reservations, allow_destroy: true

  has_many :service_types, through: :service_type_reservations, dependent: :destroy
  has_one :customer_reservation, dependent: :destroy
  has_one :customer, through: :customer_reservation, dependent: :destroy

  validates_uniqueness_of :service_type_reservations
 end
end

这是服务类型-预订模型：服务类型reservation.rb

module Booking
 class ServiceTypeReservation < ActiveRecord::Base
  belongs_to :service_type
  belongs_to :reservation
  belongs_to :service_calendar

  validates :reservation, presence: true
  validates :service_type, presence: true
 end
end

在我的预订控制器中，这些是新功能和创建功能：reservations_controller.rb

# GET /reservations/new
def new
  @serviceTypes = ServiceType.all
  @reservation = Reservation.new
  @reservation.build_service_type_reservations
  @numberOfServices = @serviceTypes.length
  if params[:service_type_id]
    @selectedService = ServiceType.find(params[:service_type_id])
  end
end

# POST /reservations
def create
  @serviceTypes = ServiceType.all
  @reservation = Reservation.new(reservation_params)

  if @reservation.save
    redirect_to new_customer_path(reservation_id: @reservation.id), notice: 'Reservation was successfully created.'
  else
    render :new
  end
end

这是预订控制器中的预订参数：

# Only allow a trusted parameter "white list" through.
  def reservation_params
    respond_to do |format|
      format.html { params.require(:reservation).permit(:updated_at, :created_at, :total_price, :customer_id, service_type_reservations_attributes: [:occupancy, :check_in, :check_out, :date, :service_type_id])}
    end
  end

要创建嵌套表单：

<%= form_for(@reservation) do |f| %>
   <%= f.fields_for :service_type_reservations do |service_reservation_form| %>

我很确定它正在创建一个新的服务类型预订，但它有一个未定义的 ID。我不确定 id 是否是那个属性。我已经尝试稍微更改代码并收到错误 "undefined attribute '0'" 所以我很确定它是 id。

当我创建预订（和 servicetype-reservation）时，它不会自动生成一个 ID 吗？（它通常在 rails..）。

如有任何帮助，我们将不胜感激。谢谢！

Answer 1

我删除了那行

validates_uniqueness_of :service_type_reservations

来自 reservations.rb

现在可以提交表单了。之前没有这条线有一个错误，但它突然开始工作了。我想我只需要重新启动服务器。

Rails has_many 通过join model undefined id: "undefined method `attributes' for #" 提交嵌套表单时

Rails has_many through join model undefined id: "undefined method `attributes' for #" when submitting nested form

forms

ruby-on-rails

nested-forms

has-many-through

nested-attributes