Class: MongoMapperExt::File

Inherits:
Object
  • Object
show all
Includes:
MongoMapper::EmbeddedDocument
Defined in:
lib/mongomapper_ext/file.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 73

def method_missing(name, *args, &block)
  f = self.get rescue nil
  if f && f.respond_to?(name)
    f.send(name, *args, &block)
  else
    super(name, *args, &block)
  end
end

Instance Method Details

#delete ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 68

def delete
  @io = nil
  gridfs.delete(grid_filename)
end

#get ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 44

def get
  @io ||= gridfs.get(grid_filename)
end

#grid_filename ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 52

def grid_filename
  @grid_filename ||= "#{_root_document.collection.name}/#{self.id}"
end

#mime_type ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 56

def mime_type
  self.content_type || get.content_type
end

#put(filename, io, options = {}) ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 12

def put(filename, io, options = {})
  options[:_id] = grid_filename

  options[:metadata] ||= {}
  options[:metadata][:collection] = _root_document.collection.name

  self.name = filename
  if filename =~ /\.([\w]{2,4})$/
    self.extension = $1
  end

  if io.kind_of?(String)
    io = StringIO.new(io)
  end

  if defined?(Magic) && Magic.respond_to?(:guess_string_mime_type)
    data = io.read(256) # be nice with memory usage
    self.content_type = options[:content_type] = Magic.guess_string_mime_type(data.to_s)
    self.extension ||= options[:content_type].to_s.split("/").last.split("-").last

    if io.respond_to?(:rewind)
      io.rewind
    else
      io.seek(0)
    end
  end

  options[:filename] = grid_filename
  gridfs.delete(grid_filename)
  gridfs.put(io, options)
end

#read(size = nil) ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 64

def read(size = nil)
  self.get.read(size)
end

#reset ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 48

def reset
  @io = nil
end

#size ⇒ Object 



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# File 'lib/mongomapper_ext/file.rb', line 60

def size
  get.file_length
end