Question

我有rails first_or_initialize方法的问题。我有模型本地化，其中有很多开放时间。在我的模型本地化中，我有代码：

has_many :opening_hours
  accepts_nested_attributes_for :opening_hours, reject_if: proc { |attributes| attributes['from_time'].blank? }, allow_destroy: true
  after_initialize :build_opening_hours

  def build_opening_hours
    if self.new_record? 
      self.opening_hours.first_or_initialize(day: "monday", from_time: nil, to_time: nil)
      self.opening_hours.first_or_initialize(day: "tuesday", from_time: nil, to_time: nil)
    end
  end

问题是这个build_opening_hours方法只用day来初始化对象：“monday”第二个对象有一天：“tuesday”没有初始化。怎么了？我无法理解为什么......

Answer 1

感谢所有帮助我的人。我有模型本地化：

class Localization < ActiveRecord::Base
has_many :opening_hours
  accepts_nested_attributes_for :opening_hours, reject_if: proc { |attributes| attributes['from_time'].blank? }, allow_destroy: true
  after_initialize :build_opening_hours

  def build_opening_hours
    if self.new_record? 
      self.opening_hours.first_or_initialize(day: "monday", from_time: nil, to_time: nil)
      self.opening_hours.first_or_initialize(day: "tuesday", from_time: nil, to_time: nil)
    end
  end
end

这个模型有很多opens_hours。我的模型opening_hours看起来像这样：

class OpeningHour < ActiveRecord::Base
belongs_to :localization
validates :to_time, :from_time, presence: true
end

现在我的目标是当我尝试创建新的本地化以使7个opening_hours对象与此本地化相关联时，例如：“星期一”，“星期二”等。我创建新本地化的表单如下所示：

= simple_form_for [:partners, @localization] do |f|
  = f.input :name
  = f.input :address
  = f.input :city
  = f.input :zip_code
  = f.input :phone_in_hours
  = f.input :phone_after_hours
  = f.input :email 
  = f.input :email2
  = f.input :substitution_cost_in_hours
  = f.input :return_cost_in_hours
  #checkbox
    = check_box_tag 'after_hours_checkbox', 1, true
    %b= t('localizations.after_hours')
  .disabled
    = f.input :return_cost_after_hours
    = f.input :substitution_cost_after_hours
    = f.input :information
    %table.table.table-striped.table-bordered#localizations
      %thead
        %tr
          %th Czynne
          %th Dzień tygodnia
          %th Otwarte od
          %th Otwarte do 
      %tbody
        = f.simple_fields_for :opening_hours do |t|
          %tr    
            %td
            %td
              = t.input :day
            %td
              = t.input :from_time, as: :string, :input_html => { :class => 'from_time' } 
            %td
              = t.input :to_time, as: :string, :input_html => { :class => 'to_time' } 

  = f.submit t('localizations.add'), class: "btn btn-primary"

first_or_initialize只创建一个对象

1 个答案: