Hello,
I've found a problem when using an entity having a CompositeId having a property "key-many-to-one".

<class name="Tariff" table="CATALOGUE_GENERAL">
<cache usage="read-write" region="Reference"/>
<composite-id name="CompId" class="CompositeId">
<key-property name="Id" column="ID_CAT_ELEMENT"/>
<key-many-to-one name="Category" class="Category" column="CD_CAT_FRAIS"/>
</composite-id>

The problem is : if the entity goes in the cache, then the object is not retreive by the method ICache.Get(object key) (using SysCache.cs)

The problem has the following origin :
1) the test "if (key.Equals(de.Key))" in SysCache.cs returns false
2) Key is a CacheKey, in its Equals implementation it is the part "this.type.Equals(this.key, that.key) " that return false.
2) type is a ComponentType, in the Equals implementation it is the
this.propertyTypes[i].Equals(this.getters[i].Get(x), this.getters[i].Get(y)))
when propertyTypes[i] = ManyToOneType that return false.
that means : instanceOfManyToOneType.Equals(Category1, Category2) return false ( or Category1 == Category2 return true !)

The reason is because implementation of ManyToOneType.Equals (which is inherited from EntityType.Equals is :
public sealed override bool Equals(object x, object y)
{
return (x == y);
}

this call == operator defined on object ( and not the one defined on Category, operators are not virtual )
If you want to redefine Equals you should redefine :
- Equals + GetHashCode AND == AND =! OPERATORS
WHICH IS NOT DONE ON ENTITYTPYE !!!

Do you agree with me ?

Hi syl74
I think you should create the class inherit IEquatable，and overwrite method Equals(object other)！
like this ：
http://www.cnblogs.com/Roping/archive/2 ... 89805.html

Thanks for your help.
I try to implement IEquatable<T> on my Category object
and on my CompositeId object but it did not change anything...