Hstore is basically a hash it stores keys and values so all you have to do is iterate over the the keys and look them up.
Here is the working code:
searchable :auto_index => false, :auto_remove => false do
text :title, :boost => 5.0
integer :category
integer :subcategory
%w[price condition website].each do |key|
string key.to_sym do
properties[key]
end
end
end
hopefully in the future they'll have support for
hstore :properties