Mapping private attributes of domain entities with Dapper dot net

c#, dapper, domain-driven-design, fluent-nhibernate-mapping, orm

Solution

One option is to create a separate set of persistence classes to work with Dapper; for example: UserRecord and CarRecord. The record classes will match db table and will be encapsulate within persistence module. Dapper queries will run against this classes and then you can have a separate persistence factory which will assemble the domain entities and return them back to the client.

Small example:

        var carRecord = DbConnection.Query<CarRecord>("select * from cars where id = @id", new {id = 1});
        var carEntity = CarFactory.Build(carRecord);

This creates a nice separation and provides flexibility.

Problem

In most of my projects I use nHibernate + Fluent mapping and recently I've started to play around with Dapper to see if I can move read operations to it. I follow DDD approach so my domain entities do not have any public setters. For example: ``` public class User { private int _id; private string _name; private IList<Car> _carList; protected User(){} // Fluent Mapping public User(string id, string name) { // validation // ... _id = id; _name = name; } public int Id{ get {return _id;} } public string Name { get {return _name;} } public IList<Car> CarList { get {return _carList;}} } public class Car { private int _id; private string _brand; protected Car(){} // Fluent Mapping public Car(string id, string brand) { // validation // ... _id = id; _brand= brand; } public int Id{ get {return _id;} } public string Brand { get {return _brand;} } } ``` With Fluent nHibernate I'm able to reveal members for mapping: ``` Id(Reveal.Member<User>("_id")).Column("id"); Map(Reveal.Member<User>("_name")).Column("name"); ``` Is there a way to map my domain entities with Dapper? If so, how?

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