Find problems before your customers do

                
public class User : Entity
{
    public override TableReference TableReference => new("users");

    public override IReadOnlyCollection<ColumnReference> PrimaryKeyColumns =>
        new[] { Id };

    public ColumnReference Id =>
        ColumnReference.String(this, "id");

    public ColumnReference IsHappy =>
        ColumnReference.Boolean(this, "is_happy");

    [Assertion]
    public Constraint AllUsersAreHappy()
    {
        return Check.For(Times.All, (User user) => 
            user.IsHappy.IsEqualTo(Constant.Boolean(true)));
    }
}