Auto-clear database on rake db:seed

seed.rb

# db/seed.rb

# This block will automatically empty the database every time db:seed is run.
ActiveRecord::Base.connection.tables.each do |table|
    # Don't clear our migration history! Clear everything else.
    if table != 'schema_migrations'
        # http://stackoverflow.com/a/7758797
        ActiveRecord::Base.connection.execute("TRUNCATE TABLE #{table};")
        # http://stackoverflow.com/questions/2097052/rails-way-to-reset-seed-on-id-field
        ActiveRecord::Base.connection.reset_pk_sequence! table
    end
end

# Actual seed data creation goes here...