如何使用Paperclip在Rails 4中上传多个图像

Question

我正在尝试为我的市场控制器创建一个图像库我可以使用回形针上传单个图像。我在谷歌上搜索但我找不到任何解决方案。如何使用回形针上传多个图像并以图库的形式显示。有什么办法吗？请给我答案。

Answer 1

Here is the article详细解释了如何实现它。下面是一些代码片段。

楷模：

# app/models/market.rb
class Market < ActiveRecord::Base
  has_many :pictures, dependent: :destroy
end

# app/models/picture.rb
class Picture < ActiveRecord::Base
  belongs_to :market

  has_attached_file :image,
    path: ":rails_root/public/images/:id/:filename",
    url: "/images/:id/:filename"

  do_not_validate_attachment_file_type :image
end

视图：

# app/views/markets/_form.html.erb
<%= form_for @market, html: { class: "form-horizontal", multipart: true } do |f| %>
  <div class="control-group">
    <%= f.label :pictures, class: "control-label" %>
    <div class="controls">
      <%= file_field_tag "images[]", type: :file, multiple: true %>
    </div>
  </div>

  <div class="form-actions">
    <%= f.submit nil, class: "btn btn-primary" %>
    <%= link_to t(".cancel", default: t("helpers.links.cancel")),
                galleries_path, class: "btn btn-mini" %>
  </div>
<% end %>

控制器：

# app/controllers/markets_controller.rb
def create
  @market = Market.new(market_params)

  respond_to do |format|
    if @market.save

      if params[:images]
        params[:images].each { |image|
          @market.pictures.create(image: image)
        }
      end

      format.html { redirect_to @market, notice: "Market was successfully created." }
      format.json { render json: @market, status: :created, location: @market }
    else
      format.html { render action: "new" }
      format.json { render json: @market.errors, status: :unprocessable_entity }
    end
  end
end