ruby on rails - Getting only file name as string -

i trying upload file in rails

i have created model following code

def self.save(upload,id)     name =  upload[:img].original_filename     directory = "public/user_db"     # create file path     path = file.join(directory, id)     # write file     file.open(path, "wb") { |f| f.write(upload['img'].read) }   end end 

my view have following field.

<div class="field">   <input type="file" name="img" id="img" placeholder="upload dp" /> </div> 

my controller calling save function following :

post = datafile.save(params,@fbuser.id) 

but getting error

do favor , don't reinvent wheel. in rails there 3 awesome gems handle file-uploading eatch having great community support , tons of shared code.

carrierwave https://github.com/carrierwaveuploader/carrierwave

paperclip https://github.com/thoughtbot/paperclip

dragonfly https://github.com/markevans/dragonfly

just follow instructions installation, migrate database, tell models how behave , lost headache within 5 minutes :-)

regarding problem-

name = upload[:img].original_filename throws expection because upload[:img] ist containing string. there no need .original_filename

but again - please use 1 of gems (or maybe read code idea of how do). there railscasts out there http://railscasts.com/episodes/253-carrierwave-file-uploads , http://railscasts.com/episodes/134-paperclip https://www.youtube.com/watch?v=gp_kn6afl-y

cheers