How to Order Laravel Models by Relationship Count?

Laravel OrderBy Relationship Count

When trying to retrieve information about the most popular hackathons based on the total number of hackathon participants, an appropriate approach is to first orderBy the count of the related hackathonParticipants model. However, it's important to note that using a statement like Hackathon::orderBy(HackathonParticipant::find($this->id)->count(), 'DESC')->take(5)->get() may not yield the desired results.

Instead, a more effective solution is to employ the withCount() method along with the orderBy() method on the Hackathon model, as demonstrated below:

Hackathon::withCount('participants')->orderBy('participants_count', 'desc')->paginate(10);

This query retrieves the hackathons with the highest number of participants, sorted in descending order, and paginates the results to display 10 hackathons per page. By utilizing the withCount() method, you can efficiently count the related hackathonParticipants without the need for an additional database query.

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