paperclip renaming stringio.txt using instance_write

Question

I am using omniauth-facebook and trying to get the profile picture to show up using paperclip. Here is the code I use to get the picture to my User model

def picture_from_url(url)
    self.profile_pic =open(url)
end

However, it always saves as stringio.txt. So searching on this behavior I found out that paperclip allows for callbacks so I wrote the following method in the User model to rename the filename

def rename_profile_pic
    self.profile_pic.instance_write :filename, "#{self.username}.jpg"
end

and passed it to the callback

before_post_process :rename_profile_pic

But this doesn't seem to help.

Any ideas how i can fix this ?

thanks

score 10 · Answer 1 · answered Jun 17 '13 at 20:37

10

In case you haven't found the solution yet:

data = StringIO.new(file_data)
data.class.class_eval { attr_accessor :original_filename, :content_type }

data.content_type = content_type
data.original_filename = file_name

object.attachment = data

answered Jun 17 '13 at 20:37

smcdrc

1,671
2
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I got everything working nicely by combining this answer with [this one](http://stackoverflow.com/a/6325039/574190). – David Tuite Oct 17 '13 at 15:28

score 1 · Answer 2 · answered Dec 22 '12 at 13:36

1

Convert your stringio.txt to file using this:

file = StringIO.new(obj)
file.original_filename = "#{self.username}.jpg"

and then assign your file to profile_pic

answered Dec 22 '12 at 13:36

Rahul garg

9,202
5
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Thanks, but that didn't help since open() was already giving a StringIO object and there isn't a method named original_filename on StringIO. Though I found the issue and fixed it. It is :file_name instead of :filename self.profile_pic.instance_write :file_name, "#{self.username}.jpg" – Bindesh Vijayan Dec 22 '12 at 17:02

score 0 · Answer 3 · answered Jul 20 '20 at 11:18

My solution for creating files from a string:

class FileIO < StringIO
  def initialize(content:, filename:)
    super(content)
    @original_filename = filename
  end

  attr_reader :original_filename
end

FileIO.new(content: obj, filename: "#{username}.jpg")

This helped me solve the problem with the Carrierwave error when saving the file:

TypeError: no implicit conversion of nil into String

paperclip renaming stringio.txt using instance_write

3 Answers3