Ouerying an object inside ravendb document - ravendb

Question

There is a doubt as of how to query or retrieve a value from an object stored in an document as follows in raven db.
class User
{
public String Id { get; set; }
public AccountType AccountType { get; set; }Servicetax
public String MainAccountMobileNo { get; set; }
public UserStatus Status { get; set; }
public String EmailId { get; set; }
public String DisplayName { get; set; }
public Object User { get; set; }
}
Here i am storing three different types of classes into the object User.
Say Customer,Retailer and Trader.
Customer
{
public String Name{ get; set; }
public String Address { get; set; }
public String MobileNo { get; set; }
public String EmailId { get; set; }
}
Retailer
{
public String Name{ get; set; }
public String Address { get; set; }
public String MobileNo { get; set; }
public String EmailId { get; set; }
}
Trader
{
public String Name{ get; set; }
public String Address { get; set; }
public String MobileNo { get; set; }
public String EmailId { get; set; }
}
Now is it possible to retrieve results based on the Customer's class detail?
That is now i want to retrieve All the Customers based on Address in the customer class, So how will i do it? How to typecast the object user in the query to type customer.
Thanks.
The user object in the document can store any type of class's object like account info trader in the above image. So how can i query from the object type that cannot is not definite and changing.
var Result = sess.Query<UserAccountInfo>().Where(x => x.AccountType == usertype && ((AccountInfoCustomer)x.User).Customerstatus == CustomerStatus.Pending);
This is the query that's been tried and this is the exception that's been caught
{"Url:
\"/indexes/dynamic/UserAccountInfos?query=AccountType%253ADistributor%2520AND%2520User).Customerstatus%253APending&start=0&pageSize=128&aggregation=None\"\r\n\r\nSystem.ArgumentException:
The field ')_Customerstatus' is not indexed, cannot query on fields
that are not indexed\r\n at
Raven.Database.Indexing.Index.IndexQueryOperation.AssertQueryDoesNotContainFieldsThatAreNotIndexes()

Answer 1

The problem here was the build of raven db. i was using the older build after changing it to newer version the query
var Result = sess.Query<UserAccountInfo>().Where(x => x.AccountType == usertype && ((AccountInfoCustomer)x.User).Customerstatus == CustomerStatus.Pending);
works fine.

Answer 2

Your classes are not very DRY. Consider this instead:
public abstract class Person
{
public string Name{ get; set; }
public string Address { get; set; }
public string MobileNumber { get; set; }
public string EmailAddress { get; set; }
}
public class Customer : Person {}
public class Retailer : Person {}
public class Trader : Person {}
Then, in your User class replace
public Object User { get; set; }
With this:
public Person Person { get; set; }
That way, you can store an instance of any of the 3 derived types. I wouldn't call the property User given that the containing class is called User and User.User could get confusing to anyone having to understand your code.