Class NHRelationshipFixer

Namespace: Breeze.Persistence.NH

Assembly: Breeze.Persistence.NH.dll

Utility class for re-establishing the relationships between entities prior to saving them in Nhibernate.

Breeze requires many-to-one relationships to have properties both the related entity and its ID, and it 
sends only the ID in the save bundle.  To make it work with NH, we map the

many-to-one

entity, and map the foreign key ID with

insert="false" update="false"

, so the

many-to-one

entity must be populated in order for the foreign key value to be saved in the DB. To work around this problem, this class uses the IDs sent by Breeze to re-connect the related entities.

public class NHRelationshipFixer

Inheritance: object

NHRelationshipFixer

Inherited Members: object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

NHRelationshipFixer(Dictionary<Type, List<EntityInfo>>, IDictionary<string, string>, ISession)

Create new instance with the given saveMap and fkMap. Since the saveMap is unique per save, this instance will be useful for processing one entire save bundle only.

public NHRelationshipFixer(Dictionary<Type, List<EntityInfo>> saveMap, IDictionary<string, string> fkMap, ISession session)

Parameters

saveMap Dictionary<Type, List<EntityInfo>>: Map of entity types -> entity instances to save. This is provided by Breeze in the SaveChanges call.
fkMap IDictionary<string, string>: Map of relationship name -> foreign key name. This is built in the NHBreezeMetadata class.
session ISession: NHibernate session that will save the entities

Methods

FixupRelationships()

Connect the related entities in the saveMap to other entities. If the related entities are not in the saveMap, they are loaded from the session.

public List<EntityInfo> FixupRelationships()

Returns

List<EntityInfo>: The list of entities in the order they should be save, according to their relationships.

RemoveRelationships()

Remove the navigations between entities in the saveMap. This flattens the JSON result so Breeze can handle it.

public void RemoveRelationships()

Table of Contents