4.3.3 check_images によるイメージ管理

1. 現在のイメージを確認(app/controllers/hujiminekos_controller.rb)

   @@ -24,6 +24,8 @@
    
      # GET /hujiminekos/1/edit
      def edit
   +    check_images(:edit)
   +    @documents = Document.all
      end

2. データの入力(app/views/hujiminekos/_form.html.erb)

   @@ -71,6 +71,33 @@
        <%= form.check_box :solved %>
      </div>
    
   +  <div class="field">
   +    <%= form.label t('individual.delete_image') %>
   +    <ul>
   +      <% hujimineko.images.each do |image| %>
   +      <%   document = @documents.where(blob_id: image.blob_id).first %>
   +      <%   if not document.nil? %>
   +      <%     comment = document.content + '(' + image.blob_id.to_s + '): ' %>
   +      <%   else %>
   +      <%     comment = '(' + image.blob_id.to_s + '): ' %>
   +      <%   end %>
   +      <li>
   +      <%=  hidden_field_tag "image_checked[#{image.blob_id}]", false %>
   +      <%=  check_box_tag "image_checked[#{image.blob_id}]", true, false, {} %>
   +      <%=  label_tag "image_checked[#{image.blob_id}]", comment %>
   +      <%=  image_tag image.representation(resize_to_limit: [100, 100]) %>
   +      </li>
   +      <% end %>
   +    </ul>
   +    <%= form.label t('individual.image_content') %>
   +    <%= form.text_field :image_content %>
   +    <%= form.label t('individual.upload') %>
   +    <%  hujimineko.images.each do |image| %>
   +    <%=   form.hidden_field :images, multiple: true, value: image.signed_id %>
   +    <%  end %>
   +    <%= form.file_field :images, multiple: true %>
   +  </div>
   +
      <div class="actions">
        <%= form.submit %>
      </div>

3. チェックボックスでの渡し方

   • check_box_tag "image_checked[#{image.blob_id}]", true, false, {}

     パラメーターで

     image_checked = { "12" => "true", "8" => "false", "52" => "false", ... }

     のように受け渡される

4. データの更新(update)・表示(show)・削除(destroy)の処理(app/controllers/hujiminekos_controller.rb)

   @@ -15,6 +15,7 @@
    
      # GET /hujiminekos/1 or /hujiminekos/1.json
      def show
   +    @documents = Document.all
      end
    
      # GET /hujiminekos/new
   @@ -73,6 +74,7 @@
              end
              user.save
            end
   +        check_images(:update, params['image_checked'])
            format.html { redirect_to hujimineko_url(@hujimineko), notice: t('individual.notice.updated', name: $individual[:name], id: $individual[:id]) }
            format.json { render :show, status: :ok, location: @hujimineko }
          else
   @@ -94,6 +96,7 @@
          user.alert = true
        end
        user.save
   +    check_images(:destroy)
        @hujimineko.destroy
    
        respond_to do |format|

5. 結果の表示(app/views/hujiminekos/show.html.erb)

   @@ -62,5 +62,25 @@
      <%= @hujimineko.solved %>
    </p>
    
   +<ul>
   +  <% @hujimineko.images.each do |image| %>
   +    <li>
   +      <% if image.representable? %>
   +      <%   document = @documents.where(blob_id: image.blob_id).first %>
   +      <%   if not document.nil? %>
   +      <%=    document.content + '(' + image.blob_id.to_s + '): ' %>
   +      <%   else %>
   +      <%=    '(' + image.blob_id.to_s + '): ' %>
   +      <%   end %>
   +      <%=  image_tag image.representation(resize_to_limit: [100, 100]) %>
   +      <% else %>
   +      <%=  link_to rails_blob_path(image, disposition: "attachment") do %>
   +      <%=  image_tag "placeholder.png", alt: "Download image" %>
   +      <% end %>
   +      <% end %>
   +    </li>
   +  <% end %>
   +</ul>
   +
    <%= link_to t('page.instruction.edit'), edit_hujimineko_path(@hujimineko) %> |
    <%= link_to t('page.instruction.back'), hujiminekos_path %>