Ruby on rails 如何创建和提交一个嵌套表单，其中的值通过关联从一个has\u many中填充？

我想创建一个

winnow\u批次

，它有许多

bean\u装运

通过

bean\u winnow\u批次

 create_table "bean_shipments", force: :cascade do |t|
    t.string "lotcode", null: false
    t.decimal "weight_remaining_kg"
  end

  create_table "bean_winnow_batches", force: :cascade do |t|
    t.integer "bean_shipment_id"
    t.integer "winnow_batch_id"
    t.decimal "bean_shipment_weight_used_kg"
end

class BeanShipment < ApplicationRecord
  has_many :bean_winnow_batches
  has_many :winnow_batches, through: :bean_winnow_batches
  accepts_nested_attributes_for :bean_winnow_batches
end

class WinnowBatch < ApplicationRecord
  has_many :bean_winnow_batches
  has_many :bean_shipments, through: :bean_winnow_batches
  accepts_nested_attributes_for :bean_winnow_batches
end

class BeanWinnowBatch < ApplicationRecord
  belongs_to :bean_shipment
  belongs_to :winnow_batch
end

winnow_batches_controller.rb

def new
    @winnow_batch = WinnowBatch.new
    @shipment_options = BeanShipment.where("weight_remaining_kg > ?", 0)
    
    @shipment_options.each do |ship|
        @winnow_batch.bean_winnow_batches.build(bean_shipment_id: ship.id)
    end
end

---

加载

winnow\u batch/new

view“未定义的方法'bean\u shipping'for#时收到的错误消息，用于解决您的错误问题：

---

“未定义的方法‘bean_Shipping’用于#你是救命恩人！非常感谢。

def new
    @winnow_batch = WinnowBatch.new
    @shipment_options = BeanShipment.where("weight_remaining_kg > ?", 0)
    
    @shipment_options.each do |ship|
        @winnow_batch.bean_winnow_batches.build(bean_shipment_id: ship.id)
    end
end