?<span style="font-weight: normal; background-color: #fafafa;">以下两种form都可以上载文件(http://guides.rails.info/form_
helpers.html#what-gets-uploaded)</span>
<h4><span style="font-weight: normal; white-space: pre; background-color: #fafafa;"><span style="white-space: normal; background-color: #ffffff;">?</span>第一种</span></h4>
<div class="quote_title">
<%= form_tag({:action => :upload}, :multipart => true) do %>
<%= file_field_tag 'picture' %>
<% end %>
<h4>第二种</h4>
<%= form_for @person do |f| %>
<%= f.file_field :picture %>
<% end %>
?
controller中
?
def upload
uploaded_io = params[:person][:picture]
File.open(Rails.root.join('public', 'uploads', uploaded_io.original_filename), 'w') do |file|
file.write(uploaded_io.read)
end
end
?
?
实例:
涉及到xls读入并创建记录
view中
?
<%= form_for(@part, :url => {:action => "upload"}) do |f| %>
<%= f.file_field :xls_file%>
<%= f.submit %>
<% end %
?controller中
?
def upload
begin
if params[:part][:xls_file]
uploaded_io = params[:part][:xls_file]
workbook = Spreadsheet.open(uploaded_io.tempfile)
sheet = workbook.worksheet 0
Part.transaction do
sheet.each do |row|
if row[0].is_a?(Float)
part = Part.create!(:name=>row[1], :project_id => params[:part][:project_id], :size=>row[3], :material=>row[4], :quantity=>row[5].to_i, :weight=>row[6], :description=>row[8])
end
end
redirect_to ......
end
else
raise Errno::error #在没有选择导入文件直接点击上载时抛出一个异常
end
rescue => err
logger.error(err)
redirect_to ......
end
end
<address>
<span>?</span><span style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 18px;">The Spreadsheet Library</span><span>:<span style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 18px;"><a style="font-size: 14px; vertical-align: baseline; background-color: transparent; color: #0077cc; text-decoration: none; cursor: pointer; padding: 0px; margin: 0px;" rel="
nofollow" href="http://spreadsheet.rubyforge.org/GUIDE_txt.html">http://spreadsheet.rubyforge.org/GUIDE_txt.html</a></span></span>
</address>
?