Rails template

Features

• Mongoid
• Rspec
• Cucumber
• Devise + Cancan
• Oauth with Facebook and Google login
• Carrierwave
• Fixes for Carrierwave and Mongoid nested documents

Usage

Fork off and clone!

Find and replace all MyApp occurences with YourAppName.

Also have a looksy in config/mongoid.yml and change the database names appropriately.

Enjoy :)

Carrierwave fix for embedded documents

I fixed some issues with Carrierwave and embedded documents, mostly with code from the community.

See below for an example uploader.

Embeds one example

With the fixes included in this template, you can easily use embedded uploaders, like so:

(in models/profile.rb)

class Profile
  include Mongoid::Document
  include Mongoid::Timestamps
  
  field :name, :type => String
  field :about, :type => String
  field :user_id, :type => String
  
  embeds_one :photo
  accepts_nested_attributes_for :photo, :allow_destroy => true, :reject_if => :all_blank
  
  # Mount the embedded uploader
  mount_embedded_uploader :photo, :file
  
  belongs_to :user
  
end

Embeds many example

If you have a model that embeds a lot of photos, however, the above will not work. You will need something like this:

(in models/post.rb)

def Post
  include Mongoid::Document
  include Mongoid::Timestamps
  
  field :title
  field :body
  
  embeds_many :photos
  accepts_nested_attributes_for :photos, :allow_destroy => true, :reject_if => proc { |attributes| attributes['file'].blank? }
  
  after_save :save_photos
  
  # forward validation to embedded documents
  def valid?(*)
     _run_validation_callbacks { super }
     validate_photos
  end

  # Validate photos callback
  def validate_photos
    photos.each do |photo|
      photo.send(:_run_validation_callbacks)
    end
  end
  
  # Save photos callback
  def save_photos
    photos.each do |photo|
      if photo.new_record? and photo.file.present?
        photo.save!
      end
    end
  end
end

Example uploader

(in models/photo.rb)

require 'carrierwave/mongoid'

class Photo
  include Mongoid::Document
  
  field :caption, :type => String
  
  mount_uploader :file, PhotoUploader
  
  embedded_in :recipe
  embedded_in :post
  embedded_in :user
  
  validates_presence_of :file
end

(in uploaders/photo_uploader.rb)

class PhotoUploader < CarrierWave::Uploader::Base

  # Include RMagick or ImageScience support:
  # include CarrierWave::RMagick
  include CarrierWave::MiniMagick
  # include CarrierWave::ImageScience

  # Choose what kind of storage to use for this uploader:
  # storage :file
  storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url
  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
  # end

  # Process files as they are uploaded:
  process :resize_to_limit => [640, 640]
  process :convert => :png
  
  #
  # def scale(width, height)
  #   # do something
  # end

  # Create different versions of your uploaded files:
  version :thumb do
    process :convert => :png 
    process :resize_and_pad => [40, 40, :white]
  end
  
  version :small do
    process :convert => :png 
    process :resize_and_pad => [100, 100, :white]
  end
  
  version :medium do
    process :convert => :png 
    process :resize_and_pad => [460, 460, :white]
  end
  
  version :large do
    process :convert => :png 
    process :resize_and_pad => [640, 640, :white]
  end
  
  version :huge do
    process :convert => :png 
    process :resize_to_limit => [960, 960]
  end
      

  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
    %w(jpg jpeg gif png)
  end
  
  def filename
    if not super.nil?
      super.chomp(File.extname(super)) + '.png'
    end
  end

end