Many-to-Many Relationships With Fluent NHibernate Automapping

• Posted by liammclennan on May 21, 2009
• 1 comments

You can't. The trick is to fall back to fluent nhibernate mapping for many-to-many relationships. Also remember to map both sides. Here is an example:

        private static AutoPersistenceModel Automapping()
        {
            return AutoPersistenceModel.MapEntitiesFromAssemblyOf<Entity>()                
                .ForTypesThatDeriveFrom<User>(map => {                     
                    map.HasManyToMany(u => u.Communities).Cascade.All().WithTableName("CommunityMembers");                    
                })
                .ForTypesThatDeriveFrom<Community>(map=> map.HasManyToMany(c => c.Users)
                     .Cascade.All().Inverse().WithTableName("CommunityMembers"))
                .Where(t => t.Namespace == "Myproject.Domain");
        }