public void EFFK_Update_NarrowingUpdate1()
{
var cust = ctx.CreateQuery <EFFKClient.Customer>("CustomObjectContext.Customers").Select(c => new EFFKClient.NarrowCustomerWithFKOrder()
{
ID = c.ID,
Orders = c.Orders.Select(o => new EFFKClient.NarrowOrderFKOnly()
{
ID = o.ID,
CustomerId = o.CustomerId
}).ToList()
}).FirstOrDefault();
var order = cust.Orders.FirstOrDefault();
// set FK
order.CustomerId = 1;
ctx.UpdateObject(order);
ctx.SaveChanges();
VerifyServerOrderId(order.ID, 1);
// Add Link
ctx.DetachLink(cust, "Orders", order);
ctx.AddLink(cust, "Orders", order);
ctx.SaveChanges();
VerifyServerOrderId(order.ID, cust.ID);
// Add Link + Set FK
order.CustomerId = 2;
ctx.DetachLink(cust, "Orders", order);
ctx.AddLink(cust, "Orders", order);
ctx.SaveChanges();
VerifyServerOrderId(order.ID, cust.ID);
}
/// <summary>
/// Detach the tracked entity and related links from the <see cref="DataServiceContext"/>.
/// </summary>
/// <param name="context">The <see cref="DataServiceContext"/> containing the entity.</param>
/// <param name="entity">The entity to detach.</param>
public static void ClearTrackedEntity(this DataServiceContext context, object entity)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (entity == null)
{
throw new ArgumentNullException("entity");
}
foreach (LinkDescriptor linkDescriptor in context.Links)
{
if (linkDescriptor.Source == entity || linkDescriptor.Target == entity)
{
context.DetachLink(linkDescriptor.Source, linkDescriptor.SourceProperty, linkDescriptor.Target);
}
}
foreach (EntityDescriptor entityDescriptor in context.Entities)
{
if (entityDescriptor.Entity == entity)
{
context.Detach(entity);
break;
}
}
}
public static void DetachAll(this DataServiceContext context)
{
foreach (var descriptor in context.EntityTracker.Entities)
{
context.Detach(descriptor.Entity);
}
foreach (var link in context.EntityTracker.Links)
{
context.DetachLink(link.Source, link.SourceProperty, link.Target);
}
}
/// <summary>
/// Resets the specified DataServiceContext object to remove all the entities.
/// </summary>
/// <param name="ctx">The DataServiceContext object.</param>
public static void Reset(this DataServiceContext ctx)
{
foreach (LinkDescriptor link in ctx.Links)
{
ctx.DetachLink(link.Source, link.SourceProperty, link.Target);
}
foreach (EntityDescriptor entity in ctx.Entities)
{
ctx.Detach(entity.Entity);
}
}
public static void ClearContext(DataServiceContext context)
{
Debug.Assert(context != null, "context != null");
foreach (var link in context.Links)
{
context.DetachLink(link.Source, link.SourceProperty, link.Target);
}
foreach (var entity in context.Entities)
{
context.Detach(entity.Entity);
}
}
public static void AddOrAttachLink(this DataServiceContext context, object source, string propertyName, object target)
{
var descriptor = context.GetLinkDescriptor(source, propertyName, target);
if (descriptor == null)
{
context.AddLink(source, propertyName, target);
}
else if (descriptor.State == EntityStates.Deleted)
{
context.DetachLink(source, propertyName, target);
context.AttachLink(source, propertyName, target);
}
}
public static void ClearContext(DataServiceContext context)
{
Debug.Assert(context != null, "context != null");
foreach (var link in context.Links)
{
context.DetachLink(link.Source, link.SourceProperty, link.Target);
}
foreach (var entity in context.Entities)
{
context.Detach(entity.Entity);
}
}
