Hi, I have a normalized data model and 1to1 mapping NH-Mapping The basic idea. A person can be assigned to multiple nodes in a structure. In each node it has specific attributes. To give a snappshot of the physical datamodel 1. table "person" 2. table "assignPersonToNode" (ForeignKey to person & node) 3. table "node" 4. table "attributeInNode" (ForeignKey to node) I retrieve entities from the database and bind them over wrapper- classes to controls. In my case I retrieve persons and nodes bind them to a treeView and when the user selects a node in a structure Attributes are displayed in ListView. Actually it works really well but now I'm a kind of uncertain about the strategy to persist or dispose non-persistent entities. When I add a new entry e.g a new person to node in a structure, I actually need to add several new entities: - one entity in table 1-3 and depending on the number of attributes - one or more entities in table 4
This also works well. in all tables i used an Id column which is defined in the mapping file as integer increment. The non-persistent entities have all id = 0 and now the application gives the user the option cancel and all new information shall be forgotten or to save the new entry. For both options how you proceed with non-persistent entities: Option one: how can I efficiently get rid of all non-persistent entities (evict session?) Option two: how can I efficiently persist the non-persistent entities (would a flush be enough?) Thanks for your guidance antoschka --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
