ruby-on-rails – Rails select_tag不会访问belongs_to关系

发布时间：2020-12-17 02:08:00 所属栏目：百科来源：网络整理

导读：我想做一个 select_tag "employee_compensation_benefits_selection",options_from_collection_for_select(@employees,"id","entity.name","1") 但是entity.name不会工作会抛出一个未定义的方法`entity.name’. “entity”属于另一个模型.通过entity_id clas

我想做一个

select_tag "employee_compensation_benefits_selection",options_from_collection_for_select(@employees,"id","entity.name","1")

但是entity.name不会工作会抛出一个未定义的方法`entity.name’. “entity”属于另一个模型.通过entity_id

class Employee < ActiveRecord::Base

  include UUIDHelper

  belongs_to :entity
  has_one :status
  has_many :restdays
  has_one :regular_work_period

  validates_presence_of :entity

end

require 'file_size_validator'
class Entity < ActiveRecord::Base

  include UUIDHelper

  has_one :access,autosave: true
  has_one :employee,autosave: true
  has_many :contact_detail,autosave: true
  has_many :file_set
  has_many :link_set

  mount_uploader :logo,AvatarUploader
  validates_presence_of :name
  validates :name,uniqueness: true
  validates_length_of :description,maximum: 256

  validates :logo,:file_size => {
            :maximum => 25.megabytes.to_i
        }
end

解决方法

您可以向员工添加可以调用的方法,例如：

class Employee < ActiveRecord::Base
  ...

  def entity_name
    self.entity.name
  end
end

然后：

select_tag "employee_compensation_benefits_selection","entity_name","1")

或者您可以使用lambda而不是添加方法：

select_tag "employee_compensation_benefits_selection",lambda { |employee| employee.entity.name },"1")

（编辑：李大同）

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