MilestonesService provides a method which returns milestones with issue count.

src/main/scala/app/MilestonesController.scala

@@ -28,8 +28,7 @@ trait MilestonesControllerBase extends ControllerBase {
 
     getRepository(owner, repository, baseUrl).map { repositoryInfo =>
       issues.html.milestones(state,
-        getMilestones(owner, repository),
-        getMilestoneIssueCounts(owner, repository),
+        getMilestonesWithIssueCount(owner, repository),
         repositoryInfo,
         isWritable(owner, repository, context.loginAccount))
     } getOrElse NotFound

src/main/scala/service/MilestonesService.scala

@@ -61,8 +61,8 @@ trait MilestonesService {
       .sortBy(_.milestoneId desc)
       .firstOption
 
-  def getMilestoneIssueCounts(owner: String, repository: String): Map[(Int, Boolean), Int] =
-    Issues
+  def getMilestonesWithIssueCount(owner: String, repository: String): List[(Milestone, Int, Int)] = {
+    val counts = Issues
       .filter { t =>
         (t.userName       is owner.bind) &&
         (t.repositoryName is repository.bind) &&
@@ -80,6 +80,11 @@ trait MilestonesService {
       }
       .toMap
 
+    getMilestones(owner, repository).map { milestone =>
+      (milestone, counts.getOrElse((milestone.milestoneId, false), 0), counts.getOrElse((milestone.milestoneId, true), 0))
+    }
+  }
+
   def getMilestones(owner: String, repository: String): List[Milestone] =
     Query(Milestones)
       .filter { t =>