Boosting by published date with Relevance
Goal: To ensure that the latest published or last updated content is ranked higher in your search results, you can modify your query to include a boost based on recency. This typically involves boosting content based on a date field such as PublishedDate or LastUpdated.
Here’s how you can update your query to prioritize recent content while still considering relevance:
var result = query.ApplyBestBets()
.BoostMatching(x => ((IContent)x).SearchTitle().MatchCaseInsensitive(contentFilter.SearchQuery), 1.5)
.OrderByDescending(x => ((IContent)x).LastUpdated) // Boost by recency
.Take(pageSize)
.Skip((pageNo - 1) * pageSize)
.StaticallyCacheFor(TimeSpan.FromSeconds(CacheSpan))
.GetResult(hitSpec);
Explanation:
OrderByDescending(x => ((IContent)x).LastUpdated)ensures that the most recently updated content appears first.- If you want to balance relevance and recency, you might consider a custom scoring function or a composite boost that combines both.
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Also, we can implementing a more advanced scoring strategy that balances relevance and freshness as below:
To implement a balanced scoring strategy that considers both relevance and recency, you can use a custom boost function. This approach allows you to:
- Boost content that matches the search query (relevance).
- Boost content that is recently published or updated (recency).
- Combine both into a composite score.
Here’s how you can update your query using a custom boost expression:
var result = query.ApplyBestBets()
.BoostMatching(x => ((IContent)x).SearchTitle().MatchCaseInsensitive(contentFilter.SearchQuery), 1.5)
.OrderByDescending(x =>
((IContent)x).SearchTitle().MatchCaseInsensitive(contentFilter.SearchQuery) ? 1 : 0 +
GetRecencyScore(((IContent)x).LastUpdated)
)
.Take(pageSize)
.Skip((pageNo - 1) * pageSize)
.StaticallyCacheFor(TimeSpan.FromSeconds(CacheSpan))
.GetResult(hitSpec);
You’ll need to define GetRecencyScore like this:
private double GetRecencyScore(DateTime lastUpdated)
{
var daysOld = (DateTime.UtcNow - lastUpdated).TotalDays;
// Example scoring: newer content gets higher score
if (daysOld <= 1) return 1.0;
if (daysOld <= 7) return 0.8;
if (daysOld <= 30) return 0.5;
if (daysOld <= 90) return 0.3;
return 0.1;
}
Why this works:
- It gives a higher score to recent content, but still considers query match.
- You can tune the weights in
GetRecencyScoreto fit your needs.
Jul 01, 2025
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