public virtual void LoadCollection <TProperty>(TEntity entity, Expression <Func <TEntity, IEnumerable <TProperty> > > childs)
where TProperty : class
{
Attach(entity);
CollectionEntry <TEntity, TProperty> collection = _dbContext.Entry(entity).Collection(childs);
if (collection.IsLoaded == false)
{
collection.Load();
}
}
public static void Reload(this CollectionEntry source)
{
if (source.CurrentValue != null)
{
foreach (var item in source.CurrentValue)
{
source.EntityEntry.Context.Entry(item).State = EntityState.Detached;
}
source.CurrentValue = null;
}
source.IsLoaded = false;
source.Load();
}
public virtual void LoadCollection <TProperty>(TDto dto, Expression <Func <TDto, IEnumerable <TProperty> > > childs)
where TProperty : class
{
try
{
Attach(dto);
CollectionEntry <TDto, TProperty> collection = _dbContext.Entry(dto).Collection(childs);
if (collection.IsLoaded == false)
{
collection.Load();
}
}
finally
{
Detach(dto);
}
}
private void ProcessEntry(CollectionEntry collectionEntry)
{
if (!collectionEntry.IsLoaded)
{
collectionEntry.Load();
}
if (collectionEntry.CurrentValue == null)
{
return;
}
var collection = new List <EntityEntry>();
switch (collectionEntry.Metadata.ForeignKey.DeleteBehavior)
{
// We only have to process changes in database,
// about changes on the client side the ef core will take care.
case DeleteBehavior.SetNull:
collection.AddRange(from object entity in collectionEntry.CurrentValue select Entry(entity));
foreach (var dependentEntry in collection)
{
SetNull(dependentEntry, collectionEntry.Metadata.ForeignKey);
}
break;
case DeleteBehavior.Cascade:
foreach (var entity in collectionEntry.CurrentValue)
{
Remove(entity);
}
break;
// Do nothing for other cases
}
}
