// expose an entity that is simultaneously both a parent and a child
// we expect a public entity list and query method for the type
public IEnumerable <SelfReferencingComposition> GetSelfReferencingCompositions()
{
List <SelfReferencingComposition> entities = new List <SelfReferencingComposition>();
SelfReferencingComposition parent1 = new SelfReferencingComposition {
ID = 1, Value = "A"
};
entities.Add(parent1);
SelfReferencingComposition child1 = new SelfReferencingComposition {
ID = 2, ParentID = 1, Parent = parent1, Value = "B"
};
parent1.Child = child1;
entities.Add(child1);
SelfReferencingComposition parent2 = new SelfReferencingComposition {
ID = 3, Value = "C"
};
entities.Add(parent2);
SelfReferencingComposition child2 = new SelfReferencingComposition {
ID = 4, ParentID = 3, Parent = parent2, Value = "D"
};
parent2.Child = child2;
entities.Add(child2);
// parent with no children
SelfReferencingComposition parent3 = new SelfReferencingComposition {
ID = 5, Value = "C"
};
entities.Add(parent3);
return(entities);
}
public void CustomParentUpdate(SelfReferencingComposition sr)
{
}
public void Update(SelfReferencingComposition sr)
{
}
public void UpdateSelfReferencingComposition(SelfReferencingComposition entity)
{
}
public void CustomParentUpdate(SelfReferencingComposition sr)
{
}
public void Update(SelfReferencingComposition sr)
{
}
public void UpdateSelfReferencingComposition(SelfReferencingComposition entity)
{
}
// expose an entity that is simultaneously both a parent and a child
// we expect a public entity list and query method for the type
public IEnumerable<SelfReferencingComposition> GetSelfReferencingCompositions()
{
List<SelfReferencingComposition> entities = new List<SelfReferencingComposition>();
SelfReferencingComposition parent1 = new SelfReferencingComposition { ID = 1, Value = "A" };
entities.Add(parent1);
SelfReferencingComposition child1 = new SelfReferencingComposition { ID = 2, ParentID = 1, Parent = parent1, Value = "B" };
parent1.Child = child1;
entities.Add(child1);
SelfReferencingComposition parent2 = new SelfReferencingComposition { ID = 3, Value = "C" };
entities.Add(parent2);
SelfReferencingComposition child2 = new SelfReferencingComposition { ID = 4, ParentID = 3, Parent = parent2, Value = "D" };
parent2.Child = child2;
entities.Add(child2);
// parent with no children
SelfReferencingComposition parent3 = new SelfReferencingComposition { ID = 5, Value = "C" };
entities.Add(parent3);
return entities;
}
private bool FilterParent(SelfReferencingComposition entity)
{
return (entity.ID == this.ParentID);
}
public void Entity_ChildCannotBeItsParent()
{
ConfigurableEntityContainer container = new ConfigurableEntityContainer();
container.CreateSet<SelfReferencingComposition>(EntitySetOperations.All);
EntitySet<SelfReferencingComposition> childSet = container.GetEntitySet<SelfReferencingComposition>();
SelfReferencingComposition child = new SelfReferencingComposition() { ID = 1 };
childSet.Attach(child);
// Verify that changing the parent throws an exception.
ExceptionHelper.ExpectInvalidOperationException(delegate
{
child.Parent = child;
}, Resource.Entity_ChildCannotBeItsParent);
}