public static bool EntriesAreEqual(EntityEntry first, EntityEntry second)
{
EntityKeys firstKey = GetKeys(first);
EntityKeys secondKey = GetKeys(second);
return(firstKey.Equals(secondKey));
}
private Entity GetEntityFromRepo(DbContext context, Entity localEntity)
{
EntityEntry entry = context.Entry(localEntity);
EntityKeys key = HelperFunctions <Entity> .GetKeys(entry);
return(context.Find <Entity>(key.Keys.ToArray()));
}
private void RemoveNoLongerPresentEntities(Entity entity)
{
using (DbContext context = contextFactory.CreateDbContext(new string[0]))
{
EntityEntry entry = context.Entry(entity);
EntityKeys key = HelperFunctions <Entity> .GetKeys(entry);
Entity root = context.Find <Entity>(key.Keys.ToArray());
RemoveEntitiesNotInUpdateRecusively(context, context.Entry(root), new HashSet <EntityKeys>());
context.SaveChanges();
}
}
public static EntityKeys GetKeys(EntityEntry entry)
{
EntityKeys keys = new EntityKeys();
foreach (var propety in entry.Properties)
{
if (propety.Metadata.IsPrimaryKey())
{
keys.AddKey(propety.CurrentValue);
}
}
return(keys);
}
private void RemoveEntitiesFromCollectionThatWereNotPartOftheUpdateAndCallRecursively(DbContext context, dynamic entitiesThatNeedToBeFiltered, HashSet <EntityKeys> alreadyTraversed)
{
List <dynamic> toBeDeleted = new List <dynamic>();
foreach (dynamic entity in entitiesThatNeedToBeFiltered)
{
EntityEntry entry = context.Entry(entity);
EntityKeys entityKey = HelperFunctions <Entity> .GetKeys(entry);
if (!entitiesThatShouldBeInUpdate.Contains(entityKey))
{
toBeDeleted.Add(entity);
}
RemoveEntitiesNotInUpdateRecusively(context, entry, alreadyTraversed);
}
Action <dynamic> deleteFromCollectionOfEntities = e => entitiesThatNeedToBeFiltered.Remove(e);
toBeDeleted.ForEach(deleteFromCollectionOfEntities);
}
private void RemoveEntitiesNotInUpdateRecusively(DbContext context, EntityEntry currentEntry, HashSet <EntityKeys> alreadyTraversed)
{
EntityKeys keys = HelperFunctions <Entity> .GetKeys(currentEntry);
bool haventTraversedThisEntity = !alreadyTraversed.Contains(keys);
if (haventTraversedThisEntity)
{
alreadyTraversed.Add(keys);
foreach (var property in currentEntry.Navigations)
{
property.Load();
dynamic propertyCurrentValue = property.CurrentValue;
if (property.Metadata.IsCollection())
{
RemoveEntitiesFromCollectionThatWereNotPartOftheUpdateAndCallRecursively(context, propertyCurrentValue, alreadyTraversed);
}
else
{
CallThisMethodRecusivelyWithChildEntity(context, property, alreadyTraversed);
}
}
}
}
