## Document Model
class Document < ActiveRecord::Base
  has_many    :samples
  belongs_to  :user
  belongs_to  :verifier, :class_name => "User", :foreign_key => "verifier_id"

  # . . .
end

## User Model
require 'digest/sha1'
class User < ActiveRecord::Base
  has_many :samples
  has_many :documents
  has_many :verified_documents, :class_name => "Document", :foreign_key => "verifier_id"
  has_many :verified_samples,   :class_name => "Sample",   :foreign_key => "verifier_id"

  # . . .
end

## Verification Controller
class VerificationsController < ApplicationController

  # . . .

  def update
    logger.debug params.inspect
    params[:document].each {| key, value |
      if value["verified"] == "1"
        logger.debug("LOADING DOCUMENT")
        @document = Document.find_by_id(key)
        logger.debug "FOUND DOCUMENT: #{@document.inspect}"
        logger.debug("USER ID: " + current_user.id.to_s)
        logger.debug("VERIFIER ID: " + @document.verifier_id.to_s)
        logger.debug("SETTING DOCUMENT VERIFIER")
        @document.verifier = current_user  # Always sets verifier to false!
        logger.debug "DOCUMENT VERIFIER SET: #{@document.inspect}"
        logger.debug("USER ID: " + current_user.id.to_s)
        logger.debug("VERIFIER ID: " + @document.verifier_id.to_s)
        logger.debug("SAVING DOCUMENT")
        @document.save!
      end}
    redirect_to verifications_path
  end
end