Hey all,
I've got a strange problem with nh, and need some fresh eyes after 3 hours of trying to fix it!
I have a Quote which contains many Parties.
Code:
<class name="JobTrak.Domain.Persistable.Quote, JobTrak.Domain" table="Quotes" lazy="true">
<id name="Id" column="QuoteID" type="Int32" unsaved-value="-1">
<generator class="identity"/>
</id>
<property name="QuoteNumber" type="Int32" not-null="true"/>
<property name="QuotedDate" type="DateTime" not-null="true"/>
<bag name="Parties" inverse="true" lazy="true" cascade="all-delete-orphan">
<key column="QuoteID"/>
<one-to-many class="JobTrak.Domain.Persistable.QuoteParty, JobTrak.Domain"/>
</bag>
<bag name="Items" inverse="true" cascade="all-delete-orphan">
<key column="QuoteID"/>
<one-to-many class="JobTrak.Domain.Persistable.QuotedItem, JobTrak.Domain"/>
</bag>
</class>
and a Party is defined as:
Code:
<class name="JobTrak.Domain.Persistable.QuoteParty, JobTrak.Domain" table="QuoteParties">
<id name="Id" column="QuotePartyID" type="Int32" unsaved-value="-1">
<generator class="identity"/>
</id>
<many-to-one name="Party" column="PartyID" class="JobTrak.Domain.Persistable.Party, JobTrak.Domain" not-null="true"/>
<many-to-one name="Role" column="PartyRoleID" class="JobTrak.Domain.Persistable.PartyRole, JobTrak.Domain" not-null="true"/>
<many-to-one name="Quote" column="QuoteID" class="JobTrak.Domain.Persistable.Quote, JobTrak.Domain" not-null="true"/>
</class>
To remove a Party from the Quote I invoke a method on the Quote object:
Code:
public void RemoveParty(QuoteParty party)
{
for (int i = 0; i < Parties.Count; i++)
{
if ((Parties[i] == party && party.Id == -1) || (party.Id > -1 && ((QuoteParty)Parties[i]).Id == party.Id))
{
QuoteParty qp = (QuoteParty) Parties[i];
Parties.RemoveAt(i);
qp.Quote = null;
break;
}
}
}
Testing the Quote object alone (without persistence) works: Parties are removed as requested.
Persisting the Quote (and QuoteParties via cascade) also works.
I then reload the Quote and Initialise the Parties collection, remove a party from the Quote and re-save the quote. Once I attempt to resave the quote I get the exception "not-null property references a null or transient value: QuoteParty, Quote".
I'm absolutely stumped as to why. Performing the same operation on the other collection named Items causes no problems.
From what I can see it should work. Even according to the log it seems it should work:
2005-06-23 17:41:38,714 [5144] NHibernate.Impl.SessionImpl..ctor(:0) - opened session
2005-06-23 17:41:38,724 [5144] NHibernate.Engine.Cascades+IdentifierValue.IsUnsaved(:0) - unsaved-value: -1
2005-06-23 17:41:38,724 [5144] NHibernate.Impl.SessionImpl.SaveOrUpdate(:0) - SaveOrUpdate() previously saved instance with id: 1
2005-06-23 17:41:38,734 [5144] NHibernate.Impl.SessionImpl.DoUpdateMutable(:0) - updating [JobTrak.Domain.Persistable.Quote#1]
2005-06-23 17:41:38,734 [5144] NHibernate.Engine.Cascades.Cascade(:0) - processing cascades for: JobTrak.Domain.Persistable.Quote
2005-06-23 17:41:38,734 [5144] NHibernate.Engine.Cascades.CascadeCollection(:0) - cascading to collection: JobTrak.Domain.Persistable.Quote.Items
2005-06-23 17:41:38,744 [5144] NHibernate.Engine.Cascades.CascadeCollection(:0) - cascading to collection: JobTrak.Domain.Persistable.Quote.Parties
2005-06-23 17:41:38,744 [5144] NHibernate.Engine.Cascades+CascadingAction+ActionSaveUpdateClass.Cascade(:0) - cascading to SaveOrUpdate()
2005-06-23 17:41:38,754 [5144] NHibernate.Engine.Cascades+IdentifierValue.IsUnsaved(:0) - unsaved-value: -1
2005-06-23 17:41:38,754 [5144] NHibernate.Impl.SessionImpl.SaveOrUpdate(:0) - SaveOrUpdate() previously saved instance with id: 1
2005-06-23 17:41:38,764 [5144] NHibernate.Impl.SessionImpl.DoUpdateMutable(:0) - updating [JobTrak.Domain.Persistable.QuoteParty#1]
2005-06-23 17:41:38,764 [5144] NHibernate.Impl.SessionImpl.Delete(:0) - deleting a transient instance
2005-06-23 17:41:38,774 [5144] NHibernate.Impl.SessionImpl.DoDelete(:0) - deleting [JobTrak.Domain.Persistable.QuoteParty#2]
2005-06-23 17:41:38,784 [5144] NHibernate.Engine.Cascades+IdentifierValue.IsUnsaved(:0) - unsaved-value: -1
2005-06-23 17:41:38,784 [5144] NHibernate.Engine.Cascades+IdentifierValue.IsUnsaved(:0) - unsaved-value: -1
2005-06-23 17:41:38,794 [5144] NHibernate.Impl.SessionImpl.Close(:0) - closing session
The test code:
Code:
Quote quote = PrepareQuote();
quoteService.SaveQuote(quote);
Quote loaded = quoteService.LoadQuote(quote.Id);
Assert.AreEqual(2, loaded.Parties.Count);
QuoteParty party = (QuoteParty) loaded.Parties[1];
loaded.RemoveParty(party);
Assert.AreEqual(1, loaded.Parties.Count);
quoteService.SaveQuote(loaded);
Does anybody know what I'm missing?
Thanks in advance,
Sean.
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