The code below demonstrates a problem I am having with my entities and
their mappings. I have stripped down the code for clarity, keeping
only the relavent parts. I have tried all possible combinations of
Cascase and inverse to no avail. Please take a look and see if anybody
can spot my error.
CATEGORY
public class Category : Entity
{
private IList<Forum> forums = new List<Forum>();
public virtual IEnumerable<Forum> Forums { get { return forums; } }
public virtual void AddForum(Forum forum)
{
if (!forums.Contains(forum)) forums.Add(forum);
}
}
FORUM
public class Forum : Entity
{
// this is here to help my model builders create navigational
// bits for the models passed into the views. I do not intend
// on even manually changing the value of this property.
// It is not passed in to the ctor nor is there a setter for it.
public virtual Category Category { get; protected set; }
}
REFERENCE CONVENTION
instance.Column(instance.Property.Name + "Id");
HASMANYCONVENTION
instance.Key.Column(instance.EntityType.Name + "Id");
instance.Cascade.All();
instance.Access.ReadOnlyPropertyThroughCamelCaseField(CamelCasePrefix.None);
PROBLEM
Category category = categoryRepository.SelectById(2); // this works
Forum forum = new Forum("Sample Forum"); // this works
category.AddForum(forum); // this APPEARS to work - it is added to the
internal collection
categoryRepository.Update(category); // this fails - cannot insert
forum into table due to null CategoryId (field is preesent in actual
table)
How do I fix this?
Thanks in advance, and if you have a solution for me, please try to
explain why it works where mine does not. This way I actually learn
something.
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