Qfyilyi

Can we adjust the Lucene search results so that items most likely to be related are shown closer to the top of the results feed - I'm thinking this would involve providing higher weight to results with matches in a page title field vs. Results with matches in a body field.

There's a bit of plumbing you need in place first. Assuming you're already somewhat familiar with the Content Search API, the core of your question is answered below.

Custom Search Result Item

This is needed in order to access the Title field you are referencing. Example implies a field name of "My Title".

public class CustomSearchResultItem : SearchResultItem

{

    [DataMember]

    [IndexField("my_title")]

    public string Title { get; set; }

}

Search Logic

var index = ContentSearchManager.GetIndex("my index");



using (var context = index.CreateSearchContext())

{

    var baseQuery = context.GetQueryable<CustomSearchResultItem>();



    var query = PredicateBuilder.True<CustomSearchResultItem>();



    if (!string.IsNullOrWhiteSpace(searchQuery))

    {

        // boost specific search matches

        query = query.Or(item => item.Title == searchQuery).Boost(50);



        // optionally, split up query to find matches on each word

        foreach (var word in searchQuery.Split(' '))

        {

            query = query.Or(item => item.Title.Contains(word)); 

        }

    }



    baseQuery = baseQuery.Where(query);



    // pagination, etc.



    var results = baseQuery.GetResults();



    // return results or map to a DTO, etc.

}

What you're mainly after is the Boost feature. My goto boost is typically 50 and seems to work well.

My main rule-of-thumb is to boost results that are an exact match (even on a content field), and then split the query into individual words for additional results.

Assemblies required:

• Sitecore.ContentSearch.dll


• Sitecore.ContentSearch.Linq.dll