我不确定嵌入式类的 Controller 应该做什么。传递的参数确实显示了所有嵌入的类属性,包括图像属性,但只有非图像参数保存在数据库中。这告诉我问题不在于 ORM(在这种情况下为 Mongoid)的选择,而是与我使用载波的方式有关:
Parameters: {"article"=>{"name"=>"New article", "comments_attributes"=>{"0"=>{"remote_image_url"=>"", "name"=>"Comment 1", "content"=>"comment content....", "image"=>#<ActionDispatch::Http::UploadedFile:0x10339d880 @headers="Content-Disposition: form-data; name=\"article[comments_attributes][0][image]\"; filename=\"dh.png\"\r\nContent-Type: image/png\r\n", @original_filename="dh.png", @tempfile=#<File:/var/folders/A1/A1SUPUTUFA8BYB5j+RD2L++++TI/-Tmp-/RackMultipart20120228-21178-1vckii1-0>, @content_type="image/png">}}, "content"=>"article content"}, "commit"=>"Create Article", "authenticity_token"=>"i14YuJs4EVKr5PSEw9IwKXcTbQfOP4mjbR95C75J2mc=", "utf8"=>"\342\234\223"}
MONGODB (89ms) freedb['system.namespaces'].find({})
MONGODB (0ms) freedb['articles'].insert([{"name"=>"New article", "comments"=>[{"name"=>"Comment 1", "_id"=>BSON::ObjectId('4f4daf6a58001652ba000012'), "content"=>"comment content...."}], "_id"=>BSON::ObjectId('4f4daf6958001652ba000011'), "content"=>"article content"}])
父模型:
class Article
include Mongoid::Document
field :name, :type => String
field :content, :type => String
embeds_many :comments
accepts_nested_attributes_for :comments
end
child 模型:
require 'carrierwave/mongoid'
class Comment
include Mongoid::Document
field :name, :type => String
field :content, :type => String
field :image, :required => true
field :remote_image_url
embedded_in :article, :inverse_of => :comments
mount_uploader :image, ImageUploader
end
父 Controller :
def new
@article = Article.new
@article.comments.build
end
def create
@article = Article.new(params[:article])
end
父表单:
<%= form_for(@article, :html => {:multipart => true}) do |f| %>
<div class = "field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<%= f.fields_for :comments do |c| %>
<p>
<%= c.label :name %>
<%= c.text_field :name %>
</p>
<p>
<%= c.label :image, "Select Screenshot from your Computer"%><br />
<%= c.file_field :image %>
</p>
<p>
<%= c.label :remote_image_url, "or URL from the interweb"%><br />
<%= c.text_field :remote_image_url %>
</p>
<% end %>
<div class = "actions">
<%= f.submit %>
</div>
<% end %>
最佳答案
Carrierwave 使用一些回调将图像和数据保存在模型中。默认情况下,嵌入式模型没有回调执行。您需要明确说明您的嵌入需要执行他的回调。
为此,请使用 cascade_callbacks: true
选项。
embeds_many :comments, cascade_callbacks: true
关于ruby-on-rails - rails : Nested form with carrierwave,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9493808/