Question

I am getting a exception “Maximum allowed requests per session (30) is reached” etc..
I am trying to run a RavenDB query inside a “for loop” and I am wondering how I can get around doing this. The code is below.

  using (var session = store.OpenSession())
        {          
            var MovieList = session.Query<Movies>()                                    
                                 .ToList();         

            foreach (var movie in MovieList)
            {
               int NumByState = session.Query<Theaters>()
                                .Where(x => x.State == movie.State)
                                .Count();

               string MovieName = movie.MovieName;
             }                     

        }               

The records in the query are in the 100s and I need to run the count query inside of for loop, I cant see another way to run the query outside of the loop.. because I need to run this query for each of the items in the list. Thanks for the help.

Answer 1

This should solve your problem:

using (var session = store.OpenSession())
{          
    var MovieList = session.Query<Movies>()                                    
        .ToList();
    var states = session.Query<Theaters>()
        .ToList()
        .GroupBy(x => x.State)
        .ToDictionary(x => x.Key, x => x.Count());         

    foreach (var movie in MovieList)
    {
        int NumByState = states.ContainsKey(movie.State)
            ? states[movie.State]
            : 0;

        string MovieName = movie.MovieName;
    }
} 

This will also be a lot faster than querying the DB hundreds of times – especially if the DB is accessed over a network.