olympiamanagement/app/views/olympiamanagements/_image_form.html.erb

<div class="control-group">
	<div class="controls">
	  <!-- if this page editing please add class "fileupload-edit" -->
	  <div class="fileupload fileupload-new clearfix" data-provides="fileupload">
		<% if(image_form.send(image_field_name).last.send(field_name).file.present? rescue false) %>
			<div class="fileupload-new thumbnail pull-left">
				<% file = image_form.send(image_field_name).last.send(field_name).to_s 
				   extname = File.extname(file) rescue ".jpg"
				   extname = ".jpg" if extname.blank?
				   file_name = URI.decode(File.basename(file)) rescue File.basename(file)
				%>
				<% if extname.match(/(jpg|png|gif|bmp)/i) %>
					<%= image_tag( image_form.send(image_field_name).last.send(field_name), :size=>"120x120") %>
				<% elsif extname.match(/pdf/i) %>
					<object data="<%=file%>" type="application/pdf" title="<%=file_name%>" height="120" width="120">
				        <a href="<%=file%>" title="<%=file_name%>"><%=file_name%></a>
				       <embed src="<%=file%>" title="<%=file_name%>" type="application/pdf" />
				    </object>
				<% else %>
					<a href="<%=file%>" title="<%=file_name%>"><%=file_name%></a>
				<% end %>
			</div>
		<% end %>
		<div class="fileupload-preview fileupload-exists thumbnail pull-left"></div>
		<% if(image_form.send(image_field_name).last.send(field_name).file.present? rescue false)%>
			 <span class="btn btn-file">
			 <%= f.fields_for image_field_name  do |index| %>
				<%= index.fields_for "0" do |image| %>
					<%= image.hidden_field(:_id,{:value=>image_form.send(image_field_name).last.id.to_s}) %>
					<%= image.file_field field_name, {:id => (image_id rescue "input-upload"), :class => ('fileupload-new'+(@extra_class rescue "")), :accept=> 'image/png,image/gif,image/jpeg'} %><%= t('preferences.change') %>
				 <% end %>
			<% end %>
			</span>
		<%else%>
			<span class="btn btn-file">
			<%= f.fields_for image_field_name  do |index| %>
				<%= index.fields_for "0" do |image| %>
					<%= image.file_field field_name, {:id => (image_id rescue "input-upload"), :class => ('fileupload-new'+(@extra_class rescue "")), :accept=> 'image/png,image/gif,image/jpeg'} %><%= t('preferences.select_image') %>
				<% end %>
			 <% end %>
			 </span>
		 <%end%>
		<input type="button" value="<%= t(:cancel) %>" class="btn fileupload-exists" data-dismiss="fileupload">
	  </div>
	</div>
</div>