Show iid in event feed and uatocomplete as default id for issues, mr

app/assets/javascripts/gfm_auto_complete.js.coffee

@@ -44,7 +44,7 @@ GitLab.GfmAutoComplete =
       tpl: @Issues.template
       callbacks:
         before_save: (issues) ->
-          $.map issues, (i) -> id: i.id, title: sanitize(i.title), search: "#{i.id} #{i.title}"
+          $.map issues, (i) -> id: i.iid, title: sanitize(i.title), search: "#{i.iid} #{i.title}"
 
     input.one "focus", =>
       $.getJSON(@dataSource).done (data) ->

app/models/event.rb

@@ -256,6 +256,10 @@ class Event < ActiveRecord::Base
     target.commit_id
   end
 
+  def target_iid
+    target.respond_to?(:iid) ? target.iid : target_id
+  end
+
   def note_short_commit_id
     note_commit_id[0..8]
   end

app/views/events/event/_common.html.haml

@@ -2,7 +2,7 @@
   %span.author_name= link_to_author event
   %span.event_label{class: event.action_name}= event_action_name(event)
   - if event.target
-    %strong= link_to "##{event.target_id}", [event.project, event.target]
+    %strong= link_to "##{event.target_iid}", [event.project, event.target]
   - else
     %strong= gfm event.target_title
   at

config/routes.rb

@@ -281,7 +281,7 @@ Gitlab::Application.routes.draw do
         end
       end
 
-      resources :issues, except: [:destroy] do
+      resources :issues, constraints: {id: /\d+/}, except: [:destroy] do
         collection do
           post  :bulk_update
         end