Method: Paperclip::Attachment#assign

Defined in:
lib/paperclip/attachment.rb

#assign(uploaded_file) ⇒ Object

What gets called when you call instance.attachment = File. It clears errors, assigns attributes, and processes the file. It also queues up the previous file for deletion, to be flushed away on #save of its host. In addition to form uploads, you can also assign another Paperclip attachment:

new_user.avatar = old_user.avatar



77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
 
# File 'lib/paperclip/attachment.rb', line 77

def assign uploaded_file
  ensure_required_accessors!

  if uploaded_file.is_a?(Paperclip::Attachment)
    uploaded_file = uploaded_file.to_file(:original)
    close_uploaded_file = uploaded_file.respond_to?(:close)
  end

  return nil unless valid_assignment?(uploaded_file)

  uploaded_file.binmode if uploaded_file.respond_to? :binmode
  self.clear

  return nil if uploaded_file.nil?

  @queued_for_write[:original]   = to_tempfile(uploaded_file)
  instance_write(:file_name,       uploaded_file.original_filename.strip)
  instance_write(:content_type,    uploaded_file.content_type.to_s.strip)
  instance_write(:file_size,       uploaded_file.size.to_i)
  instance_write(:fingerprint,     generate_fingerprint(uploaded_file))
  instance_write(:updated_at,      Time.now)

  @dirty = true

  post_process

  # Reset the file size if the original file was reprocessed.
  instance_write(:file_size,   @queued_for_write[:original].size.to_i)
  instance_write(:fingerprint, generate_fingerprint(@queued_for_write[:original]))
ensure
  uploaded_file.close if close_uploaded_file
end