Ruby，Paperclip，Formtastic，ActiveAdmin和图像

Question

如何在Paperclip，ActiveAdmin和Formtastic中创建表单？图像不是模型的一部分，而是子模型的一部分。

我想：

form :html => {:multipart => true} do |f| 
    f.inputs "Ticket Info" do 
     ... 
     f.input :image1.photo 
     f.input :image2.photo 

但是它给了一个错误ActionView::Template::Error (undefined method 'photo' for :image1:Symbol):。

这是门票模式：

class Ticket < ActiveRecord::Base 
    attr_accessible ... :image1_id, :image2_id 
... 
    belongs_to :image1, class_name: "TicketImage" 
    belongs_to :image2, class_name: "TicketImage" 

这里是TicketImage型号：

class TicketImage < ActiveRecord::Base 
    attr_accessible :file, :photo 
    has_one :ticket 
    has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png" 
end 

---

我也试过f.input :image1，但它只是给了我一个空的选择框。

---

我也试过f.input :image1, :as => :file，但我选择了一个文件后，它给了我这个错误，并点击提交：

ActiveRecord::AssociationTypeMismatch in Admin::TicketsController#update 
TicketImage(#89768376) expected, got ActionDispatch::Http::UploadedFile(#29533068) 

---

我也试过

f.semantic_fields_for :image1 do |image| 
     image.input :photo, :as => :file, :name => "Image1" 
    end 
    f.semantic_fields_for :image2 do |image| 
     image.input :photo, :as => :file, :name => "Image2" 
    end 

，而只给了一个文件选择按钮标记为照片，并在我提交后，给出了这个错误：

ActiveRecord::AssociationTypeMismatch in Admin::TicketsController#update 
TicketImage(#86546820) expected, got ActiveSupport::HashWithIndifferentAccess(#20656416) 

---

我也试过这样：补充：

ActiveAdmin.register Ticket do 
    ... 
    f.input :photo, :as => :file, :for => :image1, :name => "Image 1" 

class Ticket < ActiveRecord::Base 
    attr_accessible ... :image1_id, :image2_id, :image1_attributes, ... 
    accepts_nested_attributes_for :image1, :image2, :allow_destroy => true 


class TicketImage < ActiveRecord::Base 
    attr_accessible :file, :photo, :photo_file_name, :photo_content_type, :photo_file_size, :photo_updated_at 

，似乎并接受上传文件上传框，但在日志中，它说：

WARNING: Can't mass-assign protected attributes: photo 

---

我也试过这个，它适用于一个上传字段，但是当两者都放在表单中时，都显示！有在服务器中没有任何错误记录之一：

f.semantic_fields_for :image1 do |image| 
    image.input :photo, :as => :file, :name => "Image1", :hint => image.object.nil? ? "No Image" : f.template.image_tag(image.object.photo.url(:thumb)) 
    end 
    # f.semantic_fields_for :image2 do |image| 
    # image.input :photo, :as => :file, :name => "Image2", :hint => image.object.nil? ? "No Image" : f.template.image_tag(image.object.photo.url(:thumb)) 
    # end 

---

我也试过这个，这似乎工作的一路和保存图像，但它允许你创建一个一对多与联想image1字段，这只是一个单一的条目！我还没有尝试将两个图像添加到image1，但我期望它会崩溃。

f.has_many :image1 do |p| 
    p.input :photo, :as => :file, :label => "Image 1", :hint => p.template.image_tag(p.object.photo.url(:thumb)) 
    p.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove image' 
    end 
    f.has_many :image2 do |p| 
    p.input :photo, :as => :file, :label => "Image 2", :hint => p.template.image_tag(p.object.photo.url(:thumb)) 
    p.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove image' 
    end 

---

这个工作最好的，但提示不工作！

f.inputs :photo, :as => :file, :for => :image1, :name => "Image 1", :hint => "A Hint" 
    f.inputs :photo, :as => :file, :for => :image2, :name => "Image 2", :hint => "A Hint" 

Answer 1

嵌套形式也由Formtastic支持：

form :html => {:multipart => true} do |f| 
    f.input :number 
    f.semantic_fields_for :image1 do |image| 
    image.input :photo, :name => "Image1" 
    f.semantic_fields_for :image2 do |image| 
    image.input :photo, :name => "Image2"