Hi, All. Please help me to write mapping.
I have Parent and Child objects which are represented such T-SQls

CREATE TABLE ParentObject(
[ID] int identity (1,1) NOT NULL,
[DisplayAs] [varchar](256)
)

CREATE TABLE ChildObject(
[ParentId] int NOT NULL,
[NumberNext] int NOT NULL
)

The relation is 1:1 (Paremt.Id - Child.ParentId). And the Child.ParentId is primary key.
Parent object should not load Child automatically, I suppose I need to use lazy=true here. Also I need 2 INSERTs only (1 for Parent object, 1 for Child object). Any other T-SQL statements (UPDATE for example) are unnecessary.

I have made some variants for solved the problem, but the result still negative.

1. I have made one-to-one relashion and used class="foreign" in the Child's generator tag. It works, but it always loads Parent with Child. I do not need it, because my Parent object is cached and Child object is changed very often.

2. I have tied to use the Child object as a collection Children in the Parent object ("bag" actually). In such case I need to wrie composite-id in the Child object. But I have only Child.ParentId primary key so with is bad solution.

Actually, now the problem is what shold I write in the "id" and in the "generator" tags of Child object. But I am not sure that now I am not in the deep water...

Thank you.

You have a primary key association one-to-one. Read this, which explains exactly what to do:

http://www.hibernate.org/hib_docs/nhibe ... n-onetoone

Thank you. I read this documetn several times. Maybe I do not uderstand something (I hope it so), what's why I decided to write my question here. Would you give two mappings?

thx a lot

I'm probably too late for this... but still...
I think that your mapping is NOT one to one, but one-to-many and many-to-one, because you have a parent-child (one to many from parent to child, and many to one from child to parent)