Isolating/Accessing set session information within custom validator, servicestack API - session

Question

I was wondering the best way of accessing the a user's AuthSession from within a custom validator we have hooked up via the servicestack's fluent-validation API hooks. Basically, the requirements are forcing us to access the database through this validator using a class called "DocNumberValidator ". The user's Id is saved into session when they authenticate, down the line we need this information to complete a successful SQL query. How does one access this session information (see below....). The IoC container does not have reference to the AuthSession?
I guess the question is, how does someone pass the necessary session value into a class invoked by SS validation framework?
Sample Code :
public class MyValidator : AbstractValidator<Statuses>
{
public IDocNumberValidator DocNumberValidator { get; set; }
public StatusesValidator()
{
RuleFor(s => s.DocNumber)
.Must(docNum => this.DocNumberValidator.Validate(docNum))
.WithMessage("Document Number is invalid.")
.WithErrorCode("S-001");
}
}
public class DocNumberValidator : IDocNumberValidator
{
public IDbConnectionFactory Db { get; set; }
public bool Validate(string docNum)
{
var isFound = false;
this.Db.Run(conn =>
{
var sql = "SELECT COUNT([docNumber]) FROM [TABLE] WHERE [docNumber] = #DocNum AND [UserId] = #UserID";
var cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
cmd.Parameters.Add(new SqlParameter("#DocNum", docNum));
cmd.Parameters.Add(new SqlParameter("#UserID", ????????)); // how does one get access to saved users session here
int cnt = (int) cmd.ExecuteScalar();
if (cnt == 1)
isFound = true;
});
return isFound;
}
}

Answer 1

Not really sure this is the best way to do it. Open to suggestions.
Use SessionFeature.GetSessionKey() to get the session key
Add public ICacheClient CacheClient { get; set; } to the validator.
Will be injected by IoC container
Get the AuthUserSession (or whatever type you're using) from the
cache using the key
Added into your example
public class DocNumberValidator : IDocNumberValidator
{
public IDbConnectionFactory Db { get; set; }
public ICacheClient CacheClient { get; set; }
public bool Validate(string docNum)
{
var isFound = false;
var sessionKey = SessionFeature.GetSessionKey();
var user = CacheClient.Get<AuthUserSession>(sessionKey); //Use whatever class you stored in the session
this.Db.Run(conn =>
{
var sql = "SELECT COUNT([docNumber]) FROM [TABLE] WHERE [docNumber] = #DocNum AND [UserId] = #UserID";
var cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
cmd.Parameters.Add(new SqlParameter("#DocNum", docNum));
cmd.Parameters.Add(new SqlParameter("#UserID", user.UserAuthId)); // user whatever property you need access to
int cnt = (int) cmd.ExecuteScalar();
if (cnt == 1)
isFound = true;
});
return isFound;
}
}