public void LoadEntities()
{
if (!UnloadedIds.Any())
{
return;
}
var dbEntityReader = new EntityReader <TEntity>(Connection);
var entities = dbEntityReader.AsQueryable().WherePropertyMatches(ForeignProperty, UnloadedIds);
foreach (var entity in entities)
{
Update(entity, EntityEntryState.NoChanges);
}
UnloadedIds.Clear();
}
public void LoadEntities()
{
if (!UnloadedIds.Any())
{
return;
}
var dbEntityReader = new DbEntityReader <TEntity>(Database, EntityMapper);
var entities = dbEntityReader.AsQueryable().WherePropertyMatches(ForeignKey, ForeignPropertyMap.PropertyType, UnloadedIds);
foreach (var entity in entities)
{
Update(entity, DbEntityEntryState.NoChanges);
}
UnloadedIds.Clear();
}
public void AddForeignId(object foreignId)
{
if (foreignId == null)
{
throw new ArgumentNullException(nameof(foreignId));
}
//Check the EntityId matches the known type for TEntity
if (!ForeignProperty.PropertyType.Equals(foreignId.GetType()))
{
throw new InvalidOperationException($"Type mismatch for foreign key. {foreignId.GetType()} specified however expected type {ForeignProperty.PropertyType}");
}
//Check the entity isn't already loaded
if (!Entries.Any(e => Equals(foreignId, ForeignProperty.GetValue(e.Entity))))
{
UnloadedIds.Add(foreignId);
}
}
public new IEnumerator <TEntity> GetEnumerator()
{
//Enumerate loaded entities
var result = Entries.Select(e => e.Entity);
using (var enumerator = result.GetEnumerator())
{
while (enumerator.MoveNext())
{
yield return(enumerator.Current);
}
}
//Enumerate list of unloaded IDs and load them in one at a time
if (UnloadedIds.Any())
{
var dbEntityReader = new EntityReader <TEntity>(Connection);
var unloadedEntities = dbEntityReader.AsQueryable().WherePropertyMatches(ForeignProperty, UnloadedIds);
using (var unloadedEnumerator = unloadedEntities.GetEnumerator())
{
while (unloadedEnumerator.MoveNext())
{
var loadedEntity = unloadedEnumerator.Current;
//Load the data into the collection so we don't need to query it again
Update(loadedEntity, EntityEntryState.NoChanges);
//Remove from unloaded entity collection
var foreignId = ForeignProperty.GetValue(loadedEntity);
UnloadedIds.Remove(foreignId);
yield return(loadedEntity);
}
}
}
}