20130310141955_add_hstore_extension.rb

class AddHstoreExtension < ActiveRecord::Migration
  def up
    execute 'CREATE EXTENSION hstore'
  end

  def down
    execute 'DROP EXTENSION hstore'
  end
end

20130310183120_create_due_dates.rb

class CreateDueDates < ActiveRecord::Migration
  def change
    create_table :due_dates do |t|
      t.string :name
      t.text :description
      t.date :start
      t.string :tags, array: true
      t.hstore :recur

      t.timestamps
    end
  end
end

_form.html.erb

  <div class="field">
    <%= f.label :tags %><br />
    <%= f.collection_check_boxes :tags, %w[CAT Payroll Sales School City State Federal], :to_s, :to_s %>
  </div>
  <div class="field">
    <%= f.label :frequency %><br />
    <%= f.collection_select :frequency, %w[Daily Weekly Monthly Quarterly Annualy], :to_s, :to_s  %>
  </div>

due_date.rb

class DueDate < ActiveRecord::Base
  store_accessor :recur, :frequency
  store_accessor :recur, :day_of_week
  store_accessor :recur, :day_of_month
end

due_dates_controller.rb

class DueDatesController < ApplicationController
  before_action :set_due_date, only: [:show, :edit, :update, :destroy]
  
  def index
    @due_dates = DueDate.all
  end
  
  def show
  end
  
  def new
    @due_date = DueDate.new
  end
  
  def edit
  end
  
  def create
    @due_date = DueDate.new(due_date_params)

    respond_to do |format|
      if @due_date.save
        format.html { redirect_to @due_date, notice: 'Due date was successfully created.' }
        format.json { render action: 'show', status: :created, location: @due_date }
      else
        format.html { render action: 'new' }
        format.json { render json: @due_date.errors, status: :unprocessable_entity }
      end
    end
  end
  
  def update
    respond_to do |format|
      if @due_date.update(due_date_params)
        format.html { redirect_to @due_date, notice: 'Due date was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @due_date.errors, status: :unprocessable_entity }
      end
    end
  end
  
  private
    def set_due_date
      @due_date = DueDate.find(params[:id])
    end

    def due_date_params
      params.require(:due_date).permit(
        :name, :description, :start, { :tags => [] }, :recur,
        :day_of_month, :day_of_week, :frequency
      )
    end
end