if multiple people can share an address than it's a one to many relation,
and you can use ManyRelationCascadeEnum.AllDeleteOrphan
On 2010-01-09 09:55, DanielT wrote:
Yes they do, because multiple people can share one address (like a
household of people).
I tried inverse = true on the HasMany attribute, but it's the same
result, 2 addresses created with one that's orphaned.
On Jan 8, 10:12 pm, Krzysztof Koźmic<[email protected]>
wrote:
Does your address really needs to be an entity?
Most of the time it's really a component, which means you wouldn't have
such problems.
Otherwise, set inverse = true.
On 2010-01-09 08:55, DanielT wrote:
I have two entities, Person and Address. Here they are simplified:
------------------------------------------------------------
[ActiveRecord]
public class Person : ActiveRecordLinqBase<Person>
{
[BelongsTo(Cascade = CascadeEnum.All]
public Address Address { get; set; }
}
[ActiveRecord]
public class Address : ActiveRecordLinqBase<Address>
{
}
------------------------------------------------------------
I'm running the following code:
------------------------------------------------------------
// Add initial person and address
var person = new Person();
person.Address = new Address();
person.Save();
// Change address
person.Address = new Address();
person.Save();
------------------------------------------------------------
After running the first save, I get one Person and one Address saved
in the database, which is the expected behavior. However, after the
second save, I get one Person and TWO addresses, one of which is
orphaned. In the object-oriented world, this orphaned object would get
garbage collected, but in the database world, there's nothing that
says this Person object can't exist by itself. Semantically, it also
makes sense, since the Address belongs to the Person rather than the
other way around. However, in my object model, Address belongs to a
Person and shouldn't exist without one.
Does this mean I have to manually 'garbage collect' it? I would need
to introduce an 'ICollection<Person> Addresses' in Address and use
'Person.Queryable.Where(x => x.Addresses.Count == 0)' to determine
whether it should delete itself or not. However, can Castle do this
for me automatically?
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