public T UpdateGraph <T>(T entity, IPropertyUpdater <T> projection) where T : class, IEntity
{
var allTrackedEntries = new List <EntityEntry>(context.ChangeTracker.Entries());
var allProperties = context.Entry(entity).Metadata.GetProperties().Select(p => p.Name);
var propertiesToBeUpdated = new List <string>();
foreach (var p in projection.AllProjections.BaseEntityProjections)
{
var projectionLambda = p as LambdaExpression;
MemberExpression member = ParameterHelper.GetMemberExpression(projectionLambda);
var propertyInfo = (PropertyInfo)member.Member;
var propertyName = propertyInfo.Name;
var propertyType = propertyInfo.PropertyType;
context.Entry(entity).Property(propertyName).IsModified = true;
propertiesToBeUpdated.Add(propertyName);
}
var propertiesToBeResetSinveTheyAreNotRequestedToBeUpdated = allProperties.Except(propertiesToBeUpdated);
foreach (var propName in propertiesToBeResetSinveTheyAreNotRequestedToBeUpdated)
{
context.Entry(entity).Property(propName).CurrentValue = context.Entry(entity).Property(propName).OriginalValue;
}
foreach (var p in projection.AllProjections.NavigationPropertiesProjections)
{
var subentity = context.ChangeTracker
.Entries()
.SingleOrDefault(e => e.Metadata.ClrType.Name == p.Name && p.Id == (int)e.Property("Id").CurrentValue);
if (subentity == null)
{
continue;
}
var ahag = allTrackedEntries.Find(e => e.Metadata.ClrType.Name == p.Name && p.Id == (int)e.Property("Id").CurrentValue);
allTrackedEntries.Remove(ahag);
var allPropertieOfNavigationPropertys = subentity.Metadata.GetProperties().Select(p1 => p1.Name);
var keyProperties = subentity.Metadata.GetKeys().SelectMany(p2 => p2.Properties).Select(p3 => p3.Name);
var navigationPropertiesToBeUpdated = new List <string>();
foreach (var pp in p.Projections)
{
var projectionLambda = pp as LambdaExpression;
MemberExpression member = ParameterHelper.GetMemberExpression(projectionLambda);
var propertyInfo = (PropertyInfo)member.Member;
var propertyName = propertyInfo.Name;
var propertyType = propertyInfo.PropertyType;
if (keyProperties.Contains(propertyName))
{
continue;
}
subentity.Property(propertyName).IsModified = true;
navigationPropertiesToBeUpdated.Add(propertyName);
}
var navigationPropertiesToBeResetSinveTheyAreNotRequestedToBeUpdated = allPropertieOfNavigationPropertys.Except(navigationPropertiesToBeUpdated);
foreach (var propName in navigationPropertiesToBeResetSinveTheyAreNotRequestedToBeUpdated)
{
subentity.Property(propName).CurrentValue = subentity.Property(propName).OriginalValue;
}
}
var ahag11 = allTrackedEntries.Find(e => e.Metadata.ClrType.Name == context.Entry(entity).Metadata.ClrType.Name&& entity.Id == (int)e.Property("Id").CurrentValue);
allTrackedEntries.Remove(ahag11);
foreach (var e in allTrackedEntries)
{
var allPropertieOfNavigationPropertys = e.Metadata.GetProperties().Select(p1 => p1.Name);
foreach (var eey in allPropertieOfNavigationPropertys)
{
e.Property(eey).CurrentValue = e.Property(eey).OriginalValue;
}
e.State = EntityState.Unchanged;
}
return(entity);
}