對於那些熟悉rubygems的人,我使用CarrierWave來允許在我的應用上上傳照片。如何在照片上傳後顯示覆選框?
這是我用我的視圖代碼
Add a photo:
<%= f.file_field :image %>
我怎樣才能讓一個複選框出現在我的視圖與它上面的一些文字,只有一張照片選擇上傳相處?
下面是完整的post.html.erb查看
<%= form_for @post, :html => {:multipart => true} do |f| %>
<%= render 'shared/error_messages', object: @post %>
<div class="field">
<%= f.text_area :content, :cols => 5, :rows => 5 %>
</div>
Add a photo:<br>
<%= f.file_field :image %>
<br>
<%= f.submit "Submit", class: "btn btn-large btn-primary" %>
<% end %>
這是樁模型(相關部分)
class Post < ActiveRecord::Base
attr_accessible :content, :image
belongs_to :user
mount_uploader :image, ImageUploader
end
,並上傳模型
class ImageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
# Choose what kind of storage to use for this uploader:
storage :file
# storage :fog
# This is a sensible default for uploaders that are meant to be mounted:
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
# Provide a default URL as a default if there hasn't been a file uploaded:
# def default_url
# # For Rails 3.1+ asset pipeline compatibility:
# # asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
#
# "/images/fallback/" + [version_name, "default.png"].compact.join('_')
# end
# Avoid using model.id or version_name here, see uploader/store.rb for details.
def filename
"#{secure_token(10)}.#{file.extension}" if original_filename.present?
end
def cache_dir
"#{Rails.root}/tmp/uploads"
end
protected
def secure_token(length=16)
var = :"@#{mounted_as}_secure_token"
model.instance_variable_get(var) or model.instance_variable_set(var, SecureRandom.hex(length/2))
end
end
顯示你的模型在哪裏你定義的圖像樣式和屬性? – 2013-03-12 15:00:49
hmmm我使用了CarrierWave rubygem,我只在我的Post模型中包含了這部分內容(請參閱更新後的文章) – user2159586 2013-03-12 15:04:55