Paperclip and tempfile with Rails
- by Eric Koslow
I'm trying to write a rails application where users can upload images, but Paperclip doesn't seem to be working for me.
I've gone through all the basic steps (added has_attached_file, the migration, making the form multipart) but I keep getting the same error whenever I try uploading an image:
can't convert nil into Integer
Looking at the top of the stack
...rails3/lib/paperclip/processor.rb:46:in `sprintf'
...rails3/lib/paperclip/processor.rb:46:in `make_tmpname'
.../ruby-1.9.2-head/lib/ruby/1.9.1/tmpdir.rb:154:in `create'
.../ruby-1.9.2-head/lib/ruby/1.9.1/tempfile.rb:134:in `initialize'
It seems the problem is in the tempfile.
My code:
_form.rb
<%= form_for @high_school, :html => {:multipart => true} do |f| %>
<%= f.error_messages %>
...
<div class="field">
<%= f.file_field :photo %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
model/high_school.rb
...
validates_length_of :password, :minimum => 4, :allow_blank => true
has_attached_file :photo
has_many :students
...
Is this a known problem? I basically followed the instructions from the github to the letter.
My environment: Rails3 and Ruby 1.9.2dev
Thank you!
