/ Ruby on Rails
/
method

file_field_tag

file_field_tag(name, options = {})
public

Creates a file upload field.

If you are using file uploads then you will also need to set the multipart option for the form: 

  <%= form_tag { :action => "post" }, { :multipart => true } %>
    <label for="file">File to Upload</label> <%= file_field_tag "file" %>
    <%= submit_tag %>
  <%= end_form_tag %>

The specified URL will then be passed a File object containing the selected file, or if the field was left blank, a StringIO object.

2Notes

HTML5 support

amasses · Aug 9, 20111 thank

To support multiple file selection simply pass :multiple => true in the options hash:

file_field_tag 'file', :accept => 'image/jpeg', :multiple => true

Multiple files

ostapische · Oct 19, 2015

To use multiple file upload need to use variable_name[].
==== like this: 

file_field_tag 'files[]', :multiple => true

==== and in controller: 

if !params[ :files ].nil?
params[ :files ].each{ |file|
   # do your staff
}
end