You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: organisation.rb
    path of file: ./repos/LocalSupport/app/models
    
    the code of the file until where you have to start completion: # == Schema Information
#
# Table name: organisations
#
#  id                    :integer          not null, primary key
#  address               :string(255)      default(""), not null
#  deleted_at            :datetime
#  description           :text             default(""), not null
#  donation_info         :text             default(""), not null
#  email                 :string(255)      default(""), not null
#  gmaps                 :boolean
#  imported_at           
    
  def self.check_categories_for_import(row, org)
    category_ids = row[@@column_mappings[:cc_id]] if org
    category_ids.split(',').each do |id|
      cat = Category.find_by_charity_commission_id(id.to_i)
      org.categories << cat
    end if category_ids
  end

  def self.import_category_mappings(filename, limit)
    import(filename, limit, false) do |row, _validation|
      import_categories_from_array(row)
    end
  end

  def self.create_from_array(row, validate)
    CreateOrganisationFromArray.create(Organisation, row, validate)
  end

  def self.create_and_validate(attributes)
    # create!(attributes.select{|k,v| !v.nil?})
    create!(attributes.each { |k, v| attributes[k] =v.nil? ? 'No information recorded' : (v.empty? ? 'No information recorded' : v) })
  end

  def self.create_and_substitute_with_empty(attributes)
    create!(attributes.each { |k, v| attributes[k] = v.empty? ? 'NO INFORMATION RECORDED' : v })
  end

  def self.import_addresses(filename, limit, validation = true)
    import(filename, limit, validation) do |row, validation|
      sleep 0.1
      create_from_array(row, validation)
    end
  end

  def self.import(filename, limit, validation)
    csv_text = File.open(filename, 'r:ISO-8859-1')
    count = 0
    CSV.parse(csv_text, headers: true).each do |row|
      break if count >= limit
      count += 1
      begin
        yield(row, validation)
      rescue CSV::MalformedCSVError => e
        logger.error(e.message)
      end
    end
  end