how do I migrate Datamapper on appengine
- by Roy
I've changed my model from
class Place
include DataMapper::Resource
has n, :trails
property :id, Serial
property :name, String, :length => 140
property :tag, String, :required => true
timestamps :at
end
to
class Place
include DataMapper::Resource
has n, :trails
property :id, Serial
property :name, String, :length => 140
property :tag, String, :required => true
property :trail_count, Integer, :default => 0
timestamps :at
end
I just added "property :trail_count, Integer, :default = 0"
and i want to migrate the existing appengine table to have the extra field "trail_count"
i've read that DataMapper.auto_upgrade! should do it.
but i get an error "undefined method `auto_upgrade!' for DataMapper:Module"
can you please help How do i migrate the DM models?
