count.js

/** Fetch all conferences */
      let selectConferencesQuery;
      try {
        selectConferencesQuery = await query(
          'SELECT id, name, description, dates, tags, image FROM conferences'
        );
      } catch (e) {}

      /** Fetch the count of subevents related to a conference */
      const conferenceIds = selectConferencesQuery.results.map(
        result => result.id
      );
      try {
        await Promise.all(
          conferenceIds.map(async conferenceId => {
            const countQuery = await query(
              'SELECT COUNT(*) as count from conferences_subevents_mapping WHERE cid=?',
              [conferenceId]
            );
          })
        );
      } catch (e) {}

This function is to get all the conferences. I do not need the list of subevents, I only need the count of it. I think with this method I will have to mutate the selectedConferences.results array and update the count manually. Is there a better suggestion?