intermediate

app/collections/RelatedAchievementsCollection.coffee

@@ -0,0 +1,10 @@
+CocoCollection = require 'collections/CocoCollection'
+Achievement = require 'models/Achievement'
+
+class RelatedAchievementCollection extends CocoCollection
+  model: Achievement
+
+  initialize: (relatedID) ->
+    @url = "/db/achievement?related=#{relatedID}"
+
+module.exports = RelatedAchievementCollection

app/templates/editor/level/edit.jade

@@ -33,6 +33,8 @@ block header
             - var patches = level.get('patches')
             if patches && patches.length
               span.badge= patches.length
+        li
+          a(href="#related-achievements-view", data-toggle="tab") Achievements
         li
           a(href="#docs-components-view", data-toggle="tab", data-i18n="editor.level_tab_docs") Documentation
       .navbar-header
@@ -121,8 +123,10 @@ block outer_content
       div.tab-pane#editor-level-patches
         .patches-view
 
+      div.tab-pane#related-achievements-view
+
       div.tab-pane#docs-components-view
 
     div#error-view
 
-block footer
+block footer

app/templates/editor/related-achievements.jade

@@ -0,0 +1,5 @@
+- console.debug('this is definitely rendering');
+h2 yooo
+
+
+button Sexy

app/views/editor/RelatedAchievementsView.coffee

@@ -0,0 +1,26 @@
+CocoView = require 'views/kinds/CocoView'
+template = require 'templates/editor/related-achievements'
+RelatedAchievementsCollection = require 'collections/RelatedAchievementsCollection'
+Achievement = require 'models/Achievement'
+
+module.exports = class RelatedAchievementsView extends CocoView
+  id: 'related-achievements-view'
+  template: template
+  className: 'tab-pane'
+
+  constructor: (options) ->
+    super options
+    @relatedID = options.id
+    @achievements = new RelatedAchievementsCollection @relatedID
+    console.debug @achievements
+    @supermodel.loadCollection @achievements, 'achievements'
+
+  onLoaded: ->
+    console.debug 'related achievements loaded'
+    super()
+
+  getRenderData: ->
+    c = super()
+    c.achievements = @achievements
+    c.relatedID = @relatedID
+    c

app/views/editor/level/LevelEditView.coffee

@@ -15,6 +15,7 @@ SaveLevelModal = require './modals/SaveLevelModal'
 LevelForkView = require './modals/ForkLevelModal'
 SaveVersionModal = require 'views/modal/SaveVersionModal'
 PatchesView = require 'views/editor/PatchesView'
+RelatedAchievementsView = require 'views/editor/RelatedAchievementsView'
 VersionHistoryView = require './modals/LevelVersionsModal'
 ComponentDocsView = require 'views/docs/ComponentDocumentationView'
 
@@ -75,6 +76,7 @@ module.exports = class LevelEditView extends RootView
     @subViews['scriptsTab'] = @insertSubView new ScriptsTabView world: @world, supermodel: @supermodel, files: @files
     @subViews['componentsTab'] = @insertSubView new ComponentsTabView supermodel: @supermodel
     @subViews['systemsTab'] = @insertSubView new SystemsTabView supermodel: @supermodel
+    @subViews['achievementsTab'] = @insertSubView new RelatedAchievementsView supermodel: @supermodel, id: @level.id
     @subviews['componentsDocsTab'] = @insertSubView new ComponentDocsView supermodel: @supermodel
     
     Backbone.Mediator.publish 'level-loaded', level: @level

server/achievements/achievement_handler.coffee

@@ -11,4 +11,15 @@ class AchievementHandler extends Handler
   hasAccess: (req) ->
     req.method is 'GET' or req.user?.isAdmin()
 
+  get: (req, res) ->
+    # /db/achievement?related=<ID>
+    if req.query.related
+      return @sendUnauthorizedError(res) if not @hasAccess(req)
+      Achievement.find {related: req.query.related}, (err, docs) =>
+        return @sendDatabaseError(res, err) if err
+        docs = (@formatEntity(req, doc) for doc in docs)
+        @sendSuccess res, docs
+    else
+      super req, res
+
 module.exports = new AchievementHandler()