Class: Persistence::Adapters::GridFs

Inherits:

Object

• Object
• Persistence::Adapters::GridFs

show all

Defined in:

lib/persistence/adapters/grid_fs.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) database

  Returns the value of attribute database.

• - (Object) grid

  Returns the value of attribute grid.

Instance Method Summary (collapse)

• - (true, false) delete_file(id)

  Deletes the file from persistence store.

• - (String) get_file(id)

  Retreives the file from persistence store and returns it's content.

• - (GridFs) initialize(options = {}) constructor

  Intializes adapter with given options.

• - (Hash) metadata(id)

  Returns file metadata (filename, content type).

• - (BSON::ObjectId) push_file(source, original_filename, id = nil)

  Pushes the file into persistence store and returns it's id.

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# File 'lib/persistence/adapters/grid_fs.rb', line 22

def initialize(options = {})
  @database = options[:database]
  @grid = ::Mongo::Grid.new(@database)
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 14

def database
  @database
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 15

def grid
  @grid
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 63

def delete_file(id)
  id = self.to_id(id)
  self.grid.get(id)
  grid.delete(id)
rescue ::Mongo::GridFileNotFound
  false
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 53

def get_file(id)
  id = self.to_id(id)
  self.grid.get(id).read
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 31

def metadata(id)
  id = self.to_id(id)
  io = self.grid.get(id)
  { filename: io.filename, content_type: io.content_type }
rescue ::Mongo::GridFileNotFound
  nil
end

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# File 'lib/persistence/adapters/grid_fs.rb', line 43

def push_file(source, original_filename, id = nil)
  data = self.read_from(source)
  self.grid.put(data, filename: original_filename, _id: id)
end