Update fails as requires symbolize_keys from rails extensions to hash ( http://apidock.com/rails/Hash/symbolize_keys ).
Should instead manually map key strings to key symbols.
def update(opts = {})
res = put "#{resource_path}/#{id}", :body => opts
if res.success?
res['data'] = Hash[res['data'].map {|k, v| [k.to_sym, v] }]
@table.merge!(res['data'])
else
false
end
end