到目前为止,我已设法上传文件:
# In new.html.erb
<%= file_field_tag 'upload[file]' %>
并访问控制器中的文件
# In controller#create
@text = params[:upload][:file]
但是,这只给出了文件名,而不是文件的内容。我如何访问其内容?
我知道这是一个跳转,但是一旦我可以访问文件的内容,是否可以上传文件夹并遍历文件?
答案 0 :(得分:8)
例如,上传包含联系人的导入文件。您不需要存储此导入文件,只需处理它并丢弃它。
<强>的routes.rb 强>
resources :contacts do
collection do
get 'import/new', to: :new_import # import_new_contacts_path
post :import # import_contacts_path
end
end
<强>视图/联系人/ new_import.html.erb 强>
<%= form_for @contacts, url: import_contacts_path, html: { multipart: true } do |f| %>
<%= f.file_field :import_file %>
<% end %>
<强>控制器/ contacts_controller.rb 强>
def new_import
end
def import
begin
Contact.import( params[:contacts][:import_file] )
flash[:success] = "<strong>Contacts Imported!</strong>"
redirect_to contacts_path
rescue => exception
flash[:error] = "There was a problem importing that contacts file.<br>
<strong>#{exception.message}</strong><br>"
redirect_to import_new_contacts_path
end
end
<强>模型/ contact.rb 强>
def import import_file
File.foreach( import_file.path ).with_index do |line, index|
# Process each line.
# For any errors just raise an error with a message like this:
# raise "There is a duplicate in row #{index + 1}."
# And your controller will redirect the user and show a flash message.
end
end
希望有所帮助!
约书亚
答案 1 :(得分:5)
在new.html.erb
<%= form_tag '/controller/method_name', :multipart => true do %>
<label for="file">Upload text File</label> <%= file_field_tag "file" %>
<%= submit_tag %>
<% end %>
在controller#method_name
中uploaded_file = params[:file]
file_content = uploaded_file.read
puts file_content
在rails http://www.tutorialspoint.com/ruby-on-rails/rails-file-uploading.htm中查看有关文件上传的详情 How to read whole file in Ruby?
希望这会对你有所帮助。