diff --git a/app/services/api/v1/issues/list_service.rb b/app/services/api/v1/issues/list_service.rb
index 820f708e2..b267647e7 100644
--- a/app/services/api/v1/issues/list_service.rb
+++ b/app/services/api/v1/issues/list_service.rb
@@ -60,13 +60,31 @@ class Api::V1::Issues::ListService < ApplicationService
     issues = issues.where(author_id: author_id) if author_id.present?
 
     # issue_tag_ids
-    issues = issues.ransack(issue_tags_value_cont: issue_tag_ids.sort!.join(',')).result unless issue_tag_ids.blank?
+    if issue_tag_ids.present? 
+      if issue_tag_ids.include?('-1')
+        issues = issues.where(issue_tags_value: nil).or(issues.where(issue_tags_value: ""))
+      else 
+        issues = issues.ransack(issue_tags_value_cont: issue_tag_ids.sort!.join(',')).result
+      end
+    end
     
     # milestone_id
-    issues = issues.where(fixed_version_id: milestone_id) if milestone_id.present?
+    if milestone_id.present? 
+      if milestone_id.to_i == -1 
+        issues = issues.where(fixed_version_id: nil) 
+      else 
+        issues = issues.where(fixed_version_id: milestone_id) 
+      end
+    end
 
     # assigner_id
-    issues = issues.joins(:assigners).where(users: {id: assigner_id}) if assigner_id.present?
+    if assigner_id.present?
+      if assigner_id.to_i == -1 
+        issues = issues.left_joins(:assigners).where(users: {id: nil})
+      else 
+        issues = issues.joins(:assigners).where(users: {id: assigner_id})
+      end
+    end
 
     # status_id
     issues = issues.where(status_id: status_id) if status_id.present? && category != 'closed'