Query objects containing at least one element from a subset with RavenDB and LINQ

Question

I have a similar issue addressed in this thread : Finding objects which contains at least one element from subset using RavenDB and LINQ, but the answer is not clear to me.

string[] Categories = new[] {"A", "B"};

foreach (var cat in Categories)
{
   var currentTag = cat;
   products = products.Where(p => p.Categories.Any(c =>c.Id == currentTag));
}

When debugging "Products", the result is an "AND" and not an "OR" between each where statement (e.g. ...where category=A AND category=B. How can you make the same, just with an OR operator?

I mean, give me all products, that at least have category A OR B.

Best Nima

Answer 1

You need to use In operator.

string[] cats = new[] {"A", "B"};

var products = session.Query<Products>().Where(p => p.Categories.Any(c =>c.Id.In(cats)));