Nhibernate mapping between tables

Question

0.00/5 (No votes)

See more:

Hello everyone,

I have the following code:

public class Hotel
{
    public int ID
    {
     get;set
    }

    public IList<photo> Photos
    {
      get;set;
    }
//...other code
}

</photo>

and

public class Photo
{
  public int ID
    {
     get;set
    }
//...other fields
}

In the database, I have the following tables:

Photo: ID, Url, //.. other fields
HotelPhoto:ID, PhotoID, HotelID
Hotel:ID, Location, //..other fields

with relationships between Hotel <--> HotelPhoto and HotelPhoto <--> Photo.

My question is: can I define a mapping between Hotel and a list of Photo without creating a new class HotelPhoto? ( I want a list of photos, not a list of HotelPhoto from which to get my photos).

Thanks in advance,
Tamash

Posted 28-Aug-11 23:50pm

tamash_ionut

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ganesan Senthilvel · Answer 1 · 2011-08-29T17:01:00

Solution 1

Yes, itz possible. I'm not much familiar with NHibernate; but with the related ORMs like LInQ, etc. The customized mapping is achievable by writing our own Convert methods as

C#

public void List<photo> ConvertEntityHotelToPhoto(Hotel hotel)
{
    List<photo> retPhoto = new List<photo>();
    foreach(Photo photo in hotel.Photos)
    {
       retPhoto.Add(photo);
    }
    return retPhoto;
}</photo></photo></photo>

Posted 29-Aug-11 17:01pm

Ganesan Senthilvel

Comments

tamash_ionut 30-Aug-11 6:36am

Well that is not what I want. I dont want to write extra code for this functionality. In Entity Framework, a situation like :
Hotel <--> HotelPhoto(HotelID, PhotoID) <--> Photo automatically figures out that hotel has may photos and does not create a class HotelPhoto.
My question is if I can have a similar behaviour without having to write HotelPhoto class, by configuring somehow the mapping file?