no, and probably your "child entity" is just a component On Mon, Feb 7, 2011 at 12:01 PM, bstack <[email protected]> wrote:
> > The ParentId is in the Child entity because I thought I needed it in > order to populate the ParentId column in the dbo.[TEMP_Parent] table. > Do I not have to specify the ParentId property? > > On Feb 7, 2:11 pm, Fabio Maulo <[email protected]> wrote: > > Yes. You have to have a unidirectional relation. > > What you have implemented is a shallow-bidirectional-association: > > public class Child > > { > > public Guid Id; > > > > public Guid ParentId; > > > > public string Description; > > > > } > > > > What is "ParentId" ? > > > > > > > > > > > > On Mon, Feb 7, 2011 at 10:51 AM, bstack <[email protected]> wrote: > > > Thanks Fabio. > > > > > However, is there any way to do this avoiding a bi-directional > > > association? > > > I dont want to add a reference to Parent in the Child class. > > > > > Note I am trying to do something very simple: > > > > > 1. Create a Parent entity > > > 2. Create a collection of Child entities associating them with the > > > parent. > > > 3. Get NHibernate to just generate INSERT statements. > > > > > I was trying to do this previously by using POID = "assigned" - which > > > works however SELECT statements are also generated. > > > See > > >http://groups.google.com/group/nhusers/browse_thread/thread/c614aa5b5. > .. > > > > > Thanks, > > > Billy > > > > > On Feb 7, 1:34 pm, Fabio Maulo <[email protected]> wrote: > > > >http://nhforge.org/doc/nh/en/index.html#collections-example > > > > > > On Mon, Feb 7, 2011 at 9:34 AM, bstack <[email protected]> wrote: > > > > > All, > > > > > > > I have the following entities: > > > > > > > public class Parent > > > > > { > > > > > public Guid Id; > > > > > > > public string Description; > > > > > > > public IList<Child> Children; > > > > > } > > > > > > > public class Child > > > > > { > > > > > public Guid Id; > > > > > > > public Guid ParentId; > > > > > > > public string Description; > > > > > } > > > > > > > I have the following mappings: > > > > > > > <?xml version="1.0" encoding="utf-8" ?> > > > > > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default- > > > > > access="field"> > > > > > <class name="ClassLibrary1.Parent, ClassLibrary1" > table="dbo. > > > > > [TEMP_Parent]" lazy="false" > > > > > > <id name="Id"> > > > > > <generator class="guid.comb" /> > > > > > </id> > > > > > <property name="Description" /> > > > > > <bag name="Children" cascade="all" lazy="false" > > > > > > <key column="ParentId" foreign-key="true"/> > > > > > <one-to-many class="ClassLibrary1.Child" /> > > > > > </bag> > > > > > </class> > > > > > </hibernate-mapping> > > > > > > > <?xml version="1.0" encoding="utf-8" ?> > > > > > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default- > > > > > access="field"> > > > > > <class name="ClassLibrary1.Child, ClassLibrary1" table="dbo. > > > > > [TEMP_Child]" lazy="false"> > > > > > <id name="Id"> > > > > > <generator class="guid.comb" /> > > > > > </id> > > > > > <property name="ParentId" /> > > > > > <property name="Description" /> > > > > > </class> > > > > > </hibernate-mapping> > > > > > > > When I run the following test I get an error: > > > > > > > [Test] > > > > > public void Test1() > > > > > { > > > > > var _parent = new Parent(); > > > > > _parent.Description = "Parent desc"; > > > > > _parent.Children = new List<Child>(); > > > > > _parent.Children.Add(new Child > > > > > { > > > > > Description = "child desc 1" > > > > > }); > > > > > _parent.Children.Add(new Child > > > > > { > > > > > Description = "child desc 2" > > > > > }); > > > > > > > var _repository = new Repository(this.c_sessionManager); > > > > > _repository.Save(_parent); > > > > > } > > > > > > > NHibernate: INSERT INTO dbo.[TEMP_Parent] (Description, Id) VALUES > > > > > (@p0, @p1);@p0 = 'Parent desc', @p1 = 8c7f22c3-1a86-478a- > > > > > b8a7-9e8300cdc91b > > > > > NHibernate: INSERT INTO dbo.[TEMP_Child] (ParentId, Description, > Id) > > > > > VALUES (@p0, @p1, @p2);@p0 = 00000000-0000-0000-0000-000000000000, > @p1 > > > > > = 'child desc 1', @p2 = db3c4259-58bb-4ca0-80e5-9e8300cdc924 > > > > > 12:29:14,711 ERROR [ 7] AbstractBatcher [(null)]- Could not > execute > > > > > command: INSERT INTO dbo.[TEMP_Child] (ParentId, Description, Id) > > > > > VALUES (@p0, @p1, @p2) > > > > > System.Data.SqlClient.SqlException (0x80131904): The INSERT > statement > > > > > conflicted with the FOREIGN KEY constraint > "PK_TEMP_Child_ForeignKey". > > > > > The conflict occurred in database "OLCTG_v2", table > "dbo.TEMP_Parent", > > > > > column 'Id'. > > > > > The statement has been terminated. > > > > > > > The childs foreign key back to the parent is never populated. > > > > > Any suggestions to resolve this issue? > > > > > > > Cheers, > > > > > Billy Stack > > > > > > > -- > > > > > 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. > > > > > > -- > > > > Fabio Maulo- Hide quoted text - > > > > > > - Show quoted text - > > > > > -- > > > 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. > > > > -- > > Fabio Maulo- Hide quoted text - > > > > - Show quoted text - > > -- > 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. > > -- Fabio Maulo -- 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.
