public virtual InternalEntityEntry PrepareToSave()
{
if (EntityState == EntityState.Added)
{
var setProperty = EntityType.GetProperties().FirstOrDefault(p => p.IsReadOnlyBeforeSave && !IsTemporaryOrDefault(p));
if (setProperty != null)
{
throw new InvalidOperationException(CoreStrings.PropertyReadOnlyBeforeSave(setProperty.Name, EntityType.DisplayName()));
}
}
else if (EntityState == EntityState.Modified)
{
var modifiedProperty = EntityType.GetProperties().FirstOrDefault(p => p.IsReadOnlyAfterSave && IsModified(p));
if (modifiedProperty != null)
{
throw new InvalidOperationException(CoreStrings.PropertyReadOnlyAfterSave(modifiedProperty.Name, EntityType.DisplayName()));
}
}
if (EntityType.StoreGeneratedCount() > 0)
{
_storeGeneratedValues = new StoreGeneratedValues(this);
}
return(this);
}
public virtual void AcceptChanges()
{
if (!_storeGeneratedValues.IsEmpty)
{
var storeGeneratedValues = _storeGeneratedValues;
_storeGeneratedValues = new StoreGeneratedValues();
foreach (var property in EntityType.GetProperties())
{
object value;
if (storeGeneratedValues.TryGetValue(property, out value))
{
this[property] = value;
}
}
}
var currentState = EntityState;
if ((currentState == EntityState.Unchanged) ||
(currentState == EntityState.Detached))
{
return;
}
if ((currentState == EntityState.Added) ||
(currentState == EntityState.Modified))
{
_originalValues.AcceptChanges(this);
SetEntityState(EntityState.Unchanged, true);
}
else if (currentState == EntityState.Deleted)
{
SetEntityState(EntityState.Detached);
}
}
public virtual void DiscardStoreGeneratedValues() => _storeGeneratedValues = new StoreGeneratedValues();