public void SaveChanges()
{
// A set of entities which have been visited by the iteration operation, but may not
// have been added to the SQL command. This is primarily to prevent infinite-recursion scenarios.
HashSet <IEntity> visited = new HashSet <IEntity>();
// A set of entities which have been added to the SQL command.
HashSet <IEntity> processed = new HashSet <IEntity>();
using (var connection = new SqlConnection(_connectionString))
{
connection.Open();
var transaction = connection.BeginTransaction();
var command = connection.CreateCommand();
command.Connection = connection;
command.Transaction = transaction;
try
{
// Detele all deleted link entities first. This should be ok because nothing
// should be pointing at the link entities.
LinkTypes.ForEach(x => x.DeleteEntities(command));
// Perform inserts, updates, and deletes of regular entities.
foreach (var type in EntityTypes)
{
foreach (var entity in type.Container.NewEntities)
{
InsertEntity(command, entity, type, visited, processed);
}
foreach (var entity in type.Container.ChangedEntities)
{
UpdateEntity(command, entity, type, visited, processed);
}
foreach (var entity in type.Container.DeletededEntities)
{
DeleteEntity(command, entity, type, visited, processed);
}
}
// Now insert all link entities, which again should be ok since nothing should be linking to them.
LinkTypes.ForEach(x => x.InsertEntities(command));
transaction.Commit();
// Now that it's been committed, clear all changes.
EntityTypes.ForEach(x => x.Container.ClearChanges());
LinkTypes.ForEach(x => x.ClearChanges());
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
transaction.Rollback();
}
}
}
internal void ImportMetadata(JNode jNode, bool isFromServer)
{
DeserializeFrom(jNode, isFromServer);
EntityTypes.ForEach(et => {
// cross entity/complex type fixup.
et.UpdateNavigationProperties();
et.ComplexProperties
.Where(cp => cp.ComplexType == null)
.ForEach(cp => cp.ComplexType = GetComplexType(cp.ComplexType.Name));
});
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
// http://www.learnentityframeworkcore.com/
// don't need this code.
//modelBuilder.Entity<Bundle>().ForSqlServerToTable("Bundles");
//modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
EntityTypes.ForEach(type =>
{
var type1 = modelBuilder.Model.FindEntityType(type);
if (type1 == null)
{
modelBuilder.Model.AddEntityType(type);
}
});
base.OnModelCreating(modelBuilder);
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
EntityTypes.ForEach(type =>
{
var type1 = modelBuilder.Model.FindEntityType(type);
if (type1 == null)
{
modelBuilder.Model.AddEntityType(type);
}
if (type.GetCustomAttributes(typeof(HasNoKeyAttribute)).Any())
{
modelBuilder.Entity(type).HasNoKey();
}
});
base.OnModelCreating(modelBuilder);
}
internal void ImportMetadata(JNode jNode)
{
DeserializeFrom(jNode);
EntityTypes.ForEach(et => ResolveComplexTypeRefs(et));
}
