Module: CarrierWave::Backgrounder::ORM::Base

Included in:
ActiveModel, DataMapper
Defined in:
lib/backgrounder/orm/base.rb

Overview

Base class for all things orm

Instance Method Summary collapse

Instance Method Details

#process_in_background(column, worker_klass = nil) ⇒ Object

User#process_in_background will process and create versions in a background process.

class User < ActiveRecord::Base

mount_uploader :avatar, AvatarUploader
process_in_background :avatar

end

The above adds a User#process_upload method which can be used at times when you want to bypass background storage and processing.

@user.process_avatar = true
@user.save

You can also pass in your own workers using the second argument in case you need other things done during processing.

class User < ActiveRecord::Base
  mount_uploader :avatar, AvatarUploader
  process_in_background :avatar, CustomWorker
end

In addition you can also add a column to the database appended by _processing with a type of boolean which can be used to check if processing is complete.

def self.up
  add_column :users, :avatar_processing, :boolean, null: false, default: false
end



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# File 'lib/backgrounder/orm/base.rb', line 41

def process_in_background(column, worker_klass=nil)
  attr_accessor :"process_#{column}_upload"

  worker = worker_klass || "#{CarrierWave::Backgrounder.worker_klass}::ProcessAsset"
  mod = Module.new
  include mod

  _define_shared_backgrounder_methods(mod, column, worker )
end

#store_in_background(column, worker_klass = nil) ⇒ Object

#store_in_background will process, version and store uploads in a background process.

class User < ActiveRecord::Base

mount_uploader :avatar, AvatarUploader
store_in_background :avatar

end

The above adds a User#process_<column>_upload method which can be used at times when you want to bypass background storage and processing.

@user.process_avatar_upload = true
@user.save

You can also pass in your own workers using the second argument in case you need other things done during processing.

class User < ActiveRecord::Base
  mount_uploader :avatar, AvatarUploader
  store_in_background :avatar, CustomWorker
end



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# File 'lib/backgrounder/orm/base.rb', line 73

def store_in_background(column, worker_klass=nil)
  attr_accessor :"process_#{column}_upload"

  worker = worker_klass || "#{CarrierWave::Backgrounder.worker_klass}::StoreAsset"

  mod = Module.new
  include mod
  mod.class_eval  <<-RUBY, __FILE__, __LINE__ + 1
    def write_#{column}_identifier
      super and return if process_#{column}_upload || remove_#{column}
      self.#{column}_tmp = #{column}_cache if #{column}_cache
    end

    def store_#{column}!
      super if process_#{column}_upload
    end

  RUBY

  _define_shared_backgrounder_methods(mod, column, worker)
end