更新Rails 4的嵌套属性

Question

我在使用Rails和嵌套属性时遇到了麻烦，非常感谢您的帮助。

这是我尝试获取更新值以保存的控制台会话的输出，但是正如您所看到的，当我再次执行查找时，它们似乎没有出现在下一行：

irb(main):070:0* e = Equipment.find(26)
  Equipment Load (0.5ms)  SELECT  "equipment".* FROM "equipment" WHERE "equipment"."id" = $1 LIMIT 1  [["id", 26]]
=> #<Equipment id: 26, name: "fdsfsdsdfsd2", created_at: "2015-11-02 15:26:43", updated_at: "2015-11-02 16:38:55", site_id: 57, type_id: 3>
irb(main):071:0> e.update({"name"=>"fdsfsdsdfsd2", "site_id"=>"57", "type_id"=>"3", "equipment_properties_attributes"=>{"0"=>{"id"=>"15", "value"=>"2015-10-34", "property_id"=>"4"}, "1"=>{"id"=>"16", "value"=>"fsdfdsfsd", "property_id"=>"5"}}})
   (0.6ms)  BEGIN
  EquipmentProperty Load (0.7ms)  SELECT "equipment_properties".* FROM "equipment_properties" WHERE "equipment_properties"."equipment_id" = $1 AND "equipment_properties"."id" IN (15, 16)  [["equipment_id", 26]]
   (0.2ms)  COMMIT
=> true
irb(main):072:0> e.equipment_properties
  EquipmentProperty Load (0.5ms)  SELECT "equipment_properties".* FROM "equipment_properties" WHERE "equipment_properties"."equipment_id" = $1  [["equipment_id", 26]]
=> #<ActiveRecord::Associations::CollectionProxy [#<EquipmentProperty id: 15, equipment_id: 26, property_id: 4, value: "2015-10-34", created_at: "2015-11-02 15:26:51", updated_at: "2015-11-02 15:26:51">, #<EquipmentProperty id: 16, equipment_id: 26, property_id: 5, value: "fsdfdsfsd", created_at: "2015-11-02 15:26:51", updated_at: "2015-11-02 15:26:51">]>
irb(main):073:0> e = Equipment.find(26)
  Equipment Load (0.5ms)  SELECT  "equipment".* FROM "equipment" WHERE "equipment"."id" = $1 LIMIT 1  [["id", 26]]
=> #<Equipment id: 26, name: "fdsfsdsdfsd2", created_at: "2015-11-02 15:26:43", updated_at: "2015-11-02 16:38:55", site_id: 57, type_id: 3>
irb(main):074:0> e.equipment_properties
  EquipmentProperty Load (0.6ms)  SELECT "equipment_properties".* FROM "equipment_properties" WHERE "equipment_properties"."equipment_id" = $1  [["equipment_id", 26]]
=> #<ActiveRecord::Associations::CollectionProxy [#<EquipmentProperty id: 15, equipment_id: 26, property_id: 4, value: "2015-10-30", created_at: "2015-11-02 15:26:51", updated_at: "2015-11-02 15:26:51">, #<EquipmentProperty id: 16, equipment_id: 26, property_id: 5, value: "fsdfdsfsd", created_at: "2015-11-02 15:26:51", updated_at: "2015-11-02 15:26:51">]>

Web界面也发生了同样的事情。 如果有人需要，我可以提供其他详细信息，但是我允许在创建过程中以及创建完参数后保存初始值。

我整个早晨一直在打我的头，我怀疑这很愚蠢，但是我不确定下一步该怎么做。 谢谢！

更新1：设备型号：

class Equipment < ActiveRecord::Base
  belongs_to :site
  belongs_to :type
  has_and_belongs_to_many :properties
  has_many :equipment_properties

  accepts_nested_attributes_for :equipment_properties, reject_if: :all_blank, allow_destroy: true
end

还有equipment_properties模型：

class EquipmentProperty < ActiveRecord::Base
  belongs_to :equipment
  belongs_to :property
  has_one :type, through: :equipment

end

同样，与此相关的是，我可以不嵌套地更新各个equipment_property，并且确实可以。

更新2：

我设法将其添加到控制器，并立即保存值。 不漂亮，但我猜它能起作用...

equipment_params[:equipment_properties_attributes].each do |property|
      ep = EquipmentProperty.where(id: property[1][:id]).first
      #logger.debug "EP Value: #{ep.value}"
      #logger.debug "Property Value: #{property[1][:value]}"
      ep.value = property[1][:value]
      ep.save
    end

Answer 1

这就是我最终添加到控制器中以解决此问题的方法。 绝对是一个hack，但我不确定为什么要进行更新：

equipment_params[:equipment_properties_attributes].each do |property|
      ep = EquipmentProperty.where(id: property[1][:id]).first
      #logger.debug "EP Value: #{ep.value}"
      #logger.debug "Property Value: #{property[1][:value]}"
      ep.value = property[1][:value]
      ep.save
end