Sitecore Search API not searching List of Guids Unsupported expression node type

Question

I have created an index field called "facetCategory".

 public class IndexResultModel : SearchResultItem
    {
        [IndexField("facetcategory_sm")]
        public IList<Guid> FacetCategory { get; set; }
     }

I am using search API and passing comma seperated guids to search.I am using the following code to retirve the results where FacetCategory contains list of Guids.

 try
            {
            var query = context.GetQueryable<IndexResultModel >();
            var containsQuery = PredicateBuilder.True<IndexResultModel >();
            if (!string.IsNullOrEmpty(filters))
            {
                var facets = filters.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);
                foreach (string facet in facets)
                {
                    containsQuery = containsQuery.Or(item => item.FacetCategory.Contains(new Guid(facet)));
                }
                //join the predicate and the containsQuery
                predicate = predicate.And(containsQuery);
            }
            query = query.Where(predicate);
            if (latitude != 0 && longitude != 0)
            {
                query = query.WithinRadius(i => i.GeoLoc, latitude, longitude, distance).OrderByNearest();
            }
            if (currentPage > 0 && resultPerPage > 0)
            {
                Results = query.Skip((currentPage - 1) * currentPage).Take(resultPerPage).ToList();
            }
            else
            {
                Results = query.ToList();
            }
            }
            catch (Exception)
            {
            }

I am getting an error because of adding the below code to search code

containsQuery = containsQuery.Or(item => item.FacetCategory.Contains(new Guid(facet)));

The error says "Unsupported expression node type: MemberAccess within type constructor parameter". I have tried the other index fields which are string or integer and it works fine but because facetcategory_sm type is IList, it can not query contains guids.

here is screenshot of the field being indexed in Solr

Answer 1

You need to create your Guid variable first before trying to filter FacetCategory on it, Something like:

Guid facetGuid = new Guid(facet);
containsQuery = containsQuery.Or(item => item.FacetCategory.Contains(facetGuid))