Class: MongoidExt::File

Inherits:
EmbeddedHash show all
Defined in:
lib/mongoid_ext/file.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from EmbeddedHash

field, #id, #initialize

Constructor Details

This class inherits a constructor from EmbeddedHash

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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



72
73
74
75
76
77
78
79
 
# File 'lib/mongoid_ext/file.rb', line 72

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 Attribute Details

#_root_document ⇒ Object

Returns the value of attribute _root_document.



3
4
5
 
# File 'lib/mongoid_ext/file.rb', line 3

def _root_document
  @_root_document
end

Instance Method Details

#delete ⇒ Object 



67
68
69
70
 
# File 'lib/mongoid_ext/file.rb', line 67

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

#get ⇒ Object 



43
44
45
 
# File 'lib/mongoid_ext/file.rb', line 43

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

#grid_filename ⇒ Object 



51
52
53
 
# File 'lib/mongoid_ext/file.rb', line 51

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

#mime_type ⇒ Object 



55
56
57
 
# File 'lib/mongoid_ext/file.rb', line 55

def mime_type
  self.content_type || get.content_type
end

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



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/mongoid_ext/file.rb', line 11

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 



63
64
65
 
# File 'lib/mongoid_ext/file.rb', line 63

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

#reset ⇒ Object 



47
48
49
 
# File 'lib/mongoid_ext/file.rb', line 47

def reset
  @io = nil
end

#size ⇒ Object 



59
60
61
 
# File 'lib/mongoid_ext/file.rb', line 59

def size
  get.file_length
end