class Dragonfly::ActiveRecord::File
Constants
- MAX_CHUNK_READ
max number of chunks read at a time
- MAX_CHUNK_SIZE
BLOB is typically 65k maximum, but in our case there’s a 4/3 overhead for Base64 encoding, and up to 1% overhead for worst case GZip compression.
Public Instance Methods
data()
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# File lib/dragonfly-activerecord/file.rb, line 30 def data @_output ||= Tempfile.new('dar', encoding: 'binary').tap do |fd| index = 0 while true range = index...(index + MAX_CHUNK_READ) chunklist = chunks.where(idx:range).to_a.sort_by(&:idx) break if chunklist.empty? chunklist.each { |chunk| fd.write(chunk.data) } index += MAX_CHUNK_READ end fd.rewind end end
data=(file)
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# File lib/dragonfly-activerecord/file.rb, line 26 def data=(file) @_data = file end
Private Instance Methods
build_chunks()
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# File lib/dragonfly-activerecord/file.rb, line 46 def build_chunks # require 'pry' ; binding.pry chunks.delete_all index = 0 while chunk = @_data.read(MAX_CHUNK_SIZE) chunks.create!(data:chunk, idx:index) index += 1 end end
set_defaults()
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# File lib/dragonfly-activerecord/file.rb, line 56 def set_defaults self.metadata ||= Hash.new self.accessed_at ||= Time.current end