ROM swappable datastore example

rom_swap_datastore.rb

# Swappable datastore example

ROM_ADAPTER = :sql  # or :memory

# ...setup

class UsersSql < ROM::Relation[:sql]
  dataset :users

  def by_name(name)
    where(name: name)
  end
end if ROM_ADAPTER == :sql

class UsersMemory < ROM::Relation[:memory]
  dataset :users

  def by_name(name)
    restrict(name: name)
  end
end if ROM_ADAPTER == :memory

# ...finalize

@users = ROM.env.relation(:users)
@users.by_name('bill')