Question

模型ride.rb

class Ride < ActiveRecord::Base
..
has_one :start_address, class_name: "Address"
has_one :destination_address, class_name: "Address"

accepts_nested_attributes_for :start_address, :destination_address
..
end

模型地址.rb

class Address < ActiveRecord::Base
  belongs_to :ride
end

rides_controller.rb

class RidesController < ApplicationController
  before_action :authenticate_user!
  before_action :set_providers, only: [:new, :create]
  expose :rides
  expose :ride, attributes: :ride_params
  def index
  end

  def new
    @start_address = ride.build_start_address
    @destination_address = ride.build_destination_address
  end

  def create
    ride.user = current_user
    if ride.save
      redirect_to root_path, notice: I18n.t('shared.created', resource: 'Ride')
    else
      render :new
    end
  end

  private
  def ride_params
    params.require(:ride).permit(:price, :provider_id,
        start_address_attributes: [:street, :city, :country],
        destination_address_attributes: [:street, :city, :country])
  end

  def set_providers
    @providers = Provider.all
  end
end

我在创建动作中保存对象骑行时遇到问题。有错误：

ActiveRecord::RecordInvalid: Validation failed: Start address ride must exist,

必须存在目的地地址。当我在ride.save之前放置断点时，骑行看起来像：

#<Ride id: nil, price: 12.0, distance: 5.8, created_at: nil, updated_at: nil, user_id: 1, provider_id: 1>

错误的原因是什么？为什么需要start_address和destination_address？它是由关联has_one引起的吗？如何解决问题？提前谢谢。

Answer 1

尝试将inverse_of属性添加到关联。

请记住，rails 5默认情况下需要进行belongs_to关联。

http://blog.bigbinary.com/2016/02/15/rails-5-makes-belong-to-association-required-by-default.html

Rails accepted_nested_attributes_for验证错误

1 个答案: