xo::db::Class proc get_instance_from_db (public)

 xo::db::Class get_instance_from_db -id id 

Defined in /var/www/openacs.org/packages/xotcl-core/tcl/05-db-procs.tcl

Create an XOTcl object from an acs_object_id. This method determines the type and initializes the object from the information stored in the database. The XOTcl object is destroyed automatically on cleanup (end of a connection request).

Switches:

-id (required, integer)

Returns:

fully qualified object

Testcases:

xotcl_core_tutorial_1, xotcl_core_tutorial_2, test_xo_db_object

Source code:

set type  [:get_object_type -id $id]
set class [::xo::db::Class object_type_to_class $type]
if {![:isclass $class]} {
  error "no class $class defined"
}
set r [$class create ::$id]
$r db_1row dbqd..get_instance [$class fetch_query $id]
$r set object_id $id
$r destroy_on_cleanup
$r initialize_loaded_object
return $r

XQL Not present:

Generic, PostgreSQL, Oracle