/// <summary>
/// Eager loads any eager loaded properties.
/// Honors the user specified "Graph()" relationships to load.
/// </summary>
/// <param name="ent">The parent entity.</param>
/// <param name="rootQuery">The root query that specifies which children to load.</param>
/// <param name="directChildrenLazyOrEager"></param>
/// <param name="graphIndex">The current graph index.</param>
public void LoadEagerLoadedProperties(object ent, QGen.QueryBuilder rootQuery, IEnumerable <EntityGraph> directChildrenLazyOrEager)
{
// Load eager loaded properties
Type entType = ent.GetType();
var mappedRelationships = _repos.Relationships[entType];
foreach (var entGraphToLoad in directChildrenLazyOrEager.Where(g => g.Relationship.IsEagerLoaded))
{
var rel = mappedRelationships.Where(r => r.Member.Name == entGraphToLoad.Member.Name).FirstOrDefault();
if (rel != null)
{
using (var db = new RelationshipDataMapper(_db.ProviderFactory, _db.ConnectionString, rootQuery, entGraphToLoad.GraphIndex))
{
// NOTE: If parent _db is in a transaction, new db will be outside of that transaction.
try
{
object eagerLoadedValue = rel.EagerLoaded.Load(db, ent);
rel.Setter(ent, eagerLoadedValue);
}
catch (Exception ex)
{
var rtlEx = ex as RelationshipLoadException;
if (rtlEx != null)
{
throw;
}
throw new RelationshipLoadException(
string.Format("Eager load failed for {0}.", entGraphToLoad.EntityTypePath),
ex);
}
}
}
}
}
/// <summary>
/// Prepares any lazy loaded properties to be lazy loaded by substituting the lazy load proxy.
/// Honors the user specified "Graph()" relationships to load.
/// </summary>
/// <param name="ent"></param>
/// <param name="rootQuery"></param>
public void PrepareLazyLoadedProperties(object ent, QGen.QueryBuilder rootQuery, IEnumerable <EntityGraph> directChildrenLazyOrEager)
{
// Handle lazy loaded properties
Type entType = ent.GetType();
var mappedRelationships = _repos.Relationships[entType];
foreach (var entGraphToLoad in directChildrenLazyOrEager.Where(g => g.Relationship.IsLazyLoaded))
{
var rel = mappedRelationships.Where(r => r.Member.Name == entGraphToLoad.Member.Name).FirstOrDefault();
if (rel != null)
{
Func <IDataMapper> dbCreate = () =>
{
var db = new RelationshipDataMapper(_db.ProviderFactory, _db.ConnectionString, rootQuery, entGraphToLoad.GraphIndex);
db.SqlMode = SqlModes.Text;
return(db);
};
var lazyLoadedProxy = (ILazyLoaded)rel.LazyLoaded.Clone();
lazyLoadedProxy.Prepare(dbCreate, ent, entGraphToLoad.EntityTypePath);
rel.Setter(ent, lazyLoadedProxy);
}
}
}
