Modify Object, Save and Fetch
# modify some attributes of the XOTcl object >> ::7846 incr age = 106 # save the modified object data in the database >> ::7846 save # deleting xotcl object ::7846 in memory >> $p destroy # check, if object ::7846 exists in the database >> ::xo::db::Class exists_in_db -id 7846 = 1 # fetch person again from database: >> set p [::xo::db::Class get_instance_from_db -id 7846] = ::7846 # serialized content ::demo::Person create ::7846 -noinit -set object_title {Person 7846} -set name Gustaf -set age 106 -set projects {} -set object_id 7846 -set person_id 7846