Question

Let’s say you have two tables, ‘Users’ and ‘UserRoles’. Here’s how the two tables are structured (table – columns):

Users – UserID (int)

UserRoles – UserID (int), Role (string)

What I want is for my ‘User’ class in my domain to have an IList of roles. How do I construct my Fluent NHibernate mapping to achieve this?

Answer 1

What you’re looking for is a of a set of elements, which in standard hbm mapping is:

<set name='Roles' table='UserRoles'>   <key column='UserID' />   <element column='Role' /> </set> 

For Fluent NHibernate you can map this like so:

HasMany<string>(x => x.Roles)   .AsElement('Role'); 

You may need to also specify the key name using WithKeyColumn(string).