I'm getting an exception when attempting to cascade delete a transient entity. The error message is this...
System.NullReferenceException: Object reference not set to an instance of an object. at NHibernate.Event.Default.DefaultDeleteEventListener.DeleteTransientEntity (IEventSource session, Object entity, Boolean cascadeDeleteEnabled, IEntityPersister persister, ISet transientEntities) Searches for information on this error only show a couple of entries from the Hibernate forum. The most recent was http://forum.hibernate.org/viewtopic.php?p=2401548&sid=fab1f581c3b3c3... This error occurs only when we use the lazy="true" attribute on the bag element. Performance will be too poor if we don't use lazy loading. Has anyone seen this type of error before or have any insight or alternatives? TIA Brian I'm including the NHibernate file below for reference. The error occurs when a new ReviewerComment record is added, then removed, and then the FieldAnswer is saved. <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default- lazy="false"> <class name="TOPAZ.Domain.Forms.Answers.Sections.Fields.FieldAnswer, TOPAZ" table="FIELD_ANSWER"> <cache usage="read-write"/> <id name="FieldAnswerID" type="Int32" column="FIELD_ANSWER_ID"> <generator class="native"> <param name="sequence">FIELD_ANSWER_ID_SEQ</param> </generator> </id> <discriminator column="FIELD_TYPE_ID" type="String"/> <property name="Index" type="Int32" column="FIELD_ANSWER_ORDER" not-null="true"/> <property name="PreviousReviewSummaryID" type="Int32" column="PREV_FIELD_ANSWER_REV_SUM_ID" not-null="false"/> <property name="FieldAnswerDataHash" type="String" column="ANSWER_DATA_HASH" not-null="false"/> <many-to-one name="SectionAnswer" class="TOPAZ.Domain.Forms.Answers.Sections.SectionAnswerBase, TOPAZ" column="SECTION_ANSWER_ID" lazy="proxy"/> <many-to-one name="FieldLink" class="TOPAZ.Domain.Forms.Structure.Sections.FieldLink, TOPAZ" column="SECTION_FIELD_ID"/> <component name="Timestamp" class="TOPAZ.Domain.Timestamp, TOPAZ"> <property name="CreatedByStaff" type="String" column="CREATED_BY_STAFF" not-null="true"/> <property name="UpdatedByStaff" type="String" column="UPDATED_BY_STAFF" not-null="false"/> <property name="CreatedDateTime" type="DateTime" column="CREATED_DATETIME" not-null="true"/> <property name="UpdatedDateTime" type="DateTime" column="UPDATED_DATETIME" not-null="false"/> </component> <bag name="reviewerComments" access="field" generic="true" inverse="true" cascade="all-delete-orphan" order- by="REVIEWER_COMMENTS_ID asc" lazy="true"> <cache usage="read-write"/> <key column="FIELD_ANSWER_ID" /> <one-to-many class="TOPAZ.Domain.Reviews.ReviewerComments.ReviewerComment, TOPAZ"/> </bag> <bag name="commentSummary" access="field" generic="true" inverse="true" cascade="all-delete-orphan" lazy="true"> <cache usage="read-write"/> <key column="FIELD_ANSWER_ID" /> <one-to-many class="TOPAZ.Domain.Forms.Answers.Sections.Fields.FieldAnswerCommentSummary, TOPAZ"/> </bag> <bag fetch="select" name="fieldAnswerAttachments" access="field" generic="true" inverse="true" cascade="all-delete-orphan" lazy="true" <cache usage="read-write"/> <key column="FIELD_ANSWER_ID" /> <one-to-many class="TOPAZ.Domain.Forms.Answers.Sections.Fields.FieldAnswerAttachment, TOPAZ"/> </bag> </class> </hibernate-mapping> --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
