所以我有一個問題,通過表單爲我的Dress對象設置主圖像。 該表單允許用戶編輯禮服詳細信息,然後將圖像添加/刪除到表單(使用nested_form),併爲每個人設置標籤並分配主圖像。通過表單單選按鈕設置主屬性
除了通過單選按鈕設置主圖像以外,一切工作均已完成。
連衣裙型號:
class Dress < ActiveRecord::Base
has_many :dress_images
has_one :primary_dress_image, :class_name => "DressImage", :conditions => { :is_primary => true }
accepts_nested_attributes_for :dress_images, :allow_destroy => true
validates :name, :presence => true, :length => { :maximum => 99 }
end
DressImage模型
class DressImage < ActiveRecord::Base
belongs_to :dress
# Same as:
# def self.primary
# where(:is_primary => true)
# end
scope :primary, where(:is_primary => true)
# clear old primary if:
# this is a new record
# this is existing and is_primary has been set to true
before_save :clear_primary,
:if => Proc.new{ |r| (r.new_record? && r.is_primary) || (r.is_primary_changed? && r.is_primary) }
validates :label, :presence => true, :length => { :maximum => 60 }
validates :caption, :length => { :maximum => 200 }
mount_uploader :image, ImageUploader
def clear_primary
DressImage.update_all({:is_primary => false}, :dress_id => self.dress_id)
end
end
連衣裙編輯形式
<h1>Dress</h1>
<% @dress.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %> <%#= f.label :name %>
<%= nested_form_for @dress, :as => :dress, :url => { :action => :update }, :html=>{ :multipart => true } do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :description %>
<%= f.text_area :description %>
<%= f.fields_for :dress_images do |dress_image_form| %>
<div class="dress-image">
<%= image_tag dress_image_form.object.image_url(:thumb) %>
<%= dress_image_form.text_field :label %>
<%= dress_image_form.file_field :image %>
<div class="primary-image-radio">
<%= dress_image_form.label :is_primary, "Main Image" %>
<%= f.radio_button :primary_dress_image_id, dress_image_form.object.id %>
</div>
<p>
<%= dress_image_form.link_to_remove "Remove this attachment" %>
</p>
</div>
<% end %>
<%= f.link_to_add "Add Photo", :dress_images %>
<%= f.submit "Save Dress" %>
<% end %>
利用該單選按鈕,則primary_dress_image_id屬性被設置在裙對象上,但@ dress.primary_dress_image給ID提供了不同的結果。
如果我將單選按鈕更改爲<%= dress_image_form.radio_button :is_primary, true %>
它可以更好地工作,但由於每個單選按鈕的名稱不同,它們不會被視爲同一組。
我是新來的鐵軌,所以我可能會錯過一些完全明顯的東西或做錯了所有事情。