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Plugin for Mongoid to use GridFS and a Rack helper
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README.txt

Mongoid::Grid / Rack::Grid

  Mongoid::Grid is a plugin for mongoid that uses GridFS.  Heavily inspired
  by grip (http://github.com/jnunemaker/grip)

  Rack::Grid is used to serve a GridFS file from rack.  Mostly copied
  from http://github.com/skinandbones/rack-gridfs
  
  Download the source at
  http://github.com/dusty/mongoid_grid


Installation

  Put the libraries in your project however you want. 
  
  You could make a gem to install or use with bundler.
  
  # git clone http://github.com/dusty/mongoid_grid
  # cd mongoid_grid
  # gem build mongoid_grid.gemspec
  
  Then require the libraries you want to use.

  require 'mongoid/grid'
  require 'rack/grid'


Usage

  class Monkey
    include Mongoid::Document
    include Mongoid::Grid
    field :name
    attachment :image
  end
  
  m = Monkey.create(:name => 'name')
  
  # To add an attachment
  m.image = File.open('/tmp/me.jpg')
  m.save
  
  # To remove an attachment
  m.image = nil
  m.save
  
  # To get the attachment
  m.image.read
  
  # To use Rack::Grid with Sinatra
  
  configure do
    use Rack::Grid, :database => 'my_db'
  end
  
  <img src="<%= m.image_url %>" alt="<%= m.image_name %>" />
  
  
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