Fixed #69.

app/lib/LevelLoader.coffee

@@ -116,7 +116,7 @@ module.exports = class LevelLoader extends CocoClass
     flagThang = thangType: '53fa25f25bc220000052c2be', id: 'Placeholder Flag', components: []
     for thang in (@level.get('thangs') or []).concat [flagThang]
       thangIDs.push thang.thangType
-      @loadItemThangsEquippedByLevelThang(thang)
+      @loadThangsRequiredByLevelThang(thang)
       for comp in thang.components or []
         componentVersions.push _.pick(comp, ['original', 'majorVersion'])
 
@@ -160,23 +160,27 @@ module.exports = class LevelLoader extends CocoClass
 
     @worldNecessities = @worldNecessities.concat worldNecessities
 
-  loadItemThangsEquippedByLevelThang: (levelThang) ->
-    @loadItemThangsFromComponentList levelThang.components
+  loadThangsRequiredByLevelThang: (levelThang) ->
+    @loadThangsRequiredFromComponentList levelThang.components
 
-  loadItemThangsEquippedByThangType: (thangType) ->
-    @loadItemThangsFromComponentList thangType.get('components')
+  loadThangsRequiredByThangType: (thangType) ->
+    @loadThangsRequiredFromComponentList thangType.get('components')
 
-  loadItemThangsFromComponentList: (components) ->
-    equipsThangComponent = _.find components, (c) -> c.original is LevelComponent.EquipsID
-    inventory = equipsThangComponent?.config?.inventory
-    for itemThangType in _.values inventory
-      url = "/db/thang.type/#{itemThangType}/version?project=name,components,original"
+  loadThangsRequiredFromComponentList: (components) ->
+    requiredThangTypes = []
+    for component in components when component.config
+      if component.original is LevelComponent.EquipsID
+        requiredThangTypes.push itemThangType for itemThangType in _.values (component.config.inventory ? {})
+      else if component.config.requiredThangTypes
+        requiredThangTypes = requiredThangTypes.concat component.config.requiredThangTypes
+    for thangType in requiredThangTypes
+      url = "/db/thang.type/#{thangType}/version?project=name,components,original"
       @worldNecessities.push @maybeLoadURL(url, ThangType, 'thang')
 
   onThangNamesLoaded: (thangNames) ->
     for thangType in thangNames.models
       @loadDefaultComponentsForThangType(thangType)
-      @loadItemThangsEquippedByThangType(thangType)
+      @loadThangsRequiredByThangType(thangType)
 
   loadDefaultComponentsForThangType: (thangType) ->
     return unless components = thangType.get('components')
@@ -188,7 +192,7 @@ module.exports = class LevelLoader extends CocoClass
     index = @worldNecessities.indexOf(resource)
     if resource.name is 'thang'
       @loadDefaultComponentsForThangType(resource.model)
-      @loadItemThangsEquippedByThangType(resource.model)
+      @loadThangsRequiredByThangType(resource.model)
 
     return unless index >= 0
     @worldNecessities.splice(index, 1)

app/schemas/models/level_component.coffee

@@ -143,7 +143,7 @@ _.extend LevelComponentSchema.properties,
     format: 'hidden'
   dependencies: c.array {title: 'Dependencies', description: 'An array of Components upon which this Component depends.', uniqueItems: true}, DependencySchema
   propertyDocumentation: c.array {title: 'Property Documentation', description: 'An array of documentation entries for each notable property this Component will add to its Thang which other Components might want to also use.'}, PropertyDocumentationSchema
-  configSchema: _.extend metaschema, {title: 'Configuration Schema', description: 'A schema for validating the arguments that can be passed to this Component as configuration.', default: {type: 'object', additionalProperties: false}}
+  configSchema: _.extend metaschema, {title: 'Configuration Schema', description: 'A schema for validating the arguments that can be passed to this Component as configuration.', default: {type: 'object'}}
   official:
     type: 'boolean'
     title: 'Official'

app/views/account/JobProfileTreemaView.coffee

@@ -82,7 +82,7 @@ module.exports = class JobProfileTreemaView extends CocoView
       {name: 'Provide your name.', weight: 1, fn: modified 'name'}
       {name: 'Choose your city.', weight: 1, fn: modified 'city'}
       {name: 'Pick your country.', weight: 0, fn: exists 'country'}
-      {name: 'List at least five skills.', weight: 2, fn: -> jobProfile.skills.length >= 5}
+      {name: 'List at least five skills.', weight: 2, fn: -> jobProfile.skills?.length >= 5}
       {name: 'Write a short description to summarize yourself at a glance.', weight: 2, fn: modified 'shortDescription'}
       {name: 'Fill in your main description to sell yourself and describe the work you\'re looking for.', weight: 3, fn: modified 'longDescription'}
       {name: 'List your work experience.', weight: 3, fn: listStarted 'work', ['role', 'employer']}
@@ -95,7 +95,7 @@ module.exports = class JobProfileTreemaView extends CocoView
   getData: ->
     return {} unless me.get('jobProfile') or @hasEditedProfile
     _.pick @jobProfileTreema.data, (value, key) => key in @editableSettings
-      
+
   destroy: ->
     @jobProfileTreema?.destroy()
     super()

app/views/editor/component/ThangComponentConfigView.coffee

@@ -30,7 +30,7 @@ module.exports = class ThangComponentConfigView extends CocoView
   afterRender: ->
     super()
     @buildTreema()
-    
+
   setConfig: (config) ->
     @handlingChange = true
     @editThangTreema.set('/', config)
@@ -51,7 +51,7 @@ module.exports = class ThangComponentConfigView extends CocoView
     schema = $.extend true, {}, @component.get('configSchema')
     schema.default ?= {}
     _.merge schema.default, @additionalDefaults if @additionalDefaults
-    
+
     if @level?.get('type') is 'hero'
       schema.required = []
     treemaOptions =
@@ -77,6 +77,7 @@ module.exports = class ThangComponentConfigView extends CocoView
         'seconds': nodes.SecondsNode
         'speed': nodes.SpeedNode
         'acceleration': nodes.AccelerationNode
+        'thang-type': nodes.ThangTypeNode
         'item-thang-type': nodes.ItemThangTypeNode
 
     @editThangTreema = @$el.find('.treema').treema treemaOptions
@@ -92,7 +93,7 @@ module.exports = class ThangComponentConfigView extends CocoView
     @trigger 'changed', { component: @component, config: @config }
 
   data: -> @editThangTreema.data
-    
+
   destroy: ->
     @editThangTreema?.destroy()
     super()

app/views/editor/level/LevelFeedbackView.coffee

@@ -33,16 +33,16 @@ module.exports = class LevelFeedbackView extends CocoView
 
   getRenderData: (context={}) ->
     context = super(context)
+    context.moment = moment
+    context.allFeedback = []
+    context.averageRating = 0
+    context.totalRatings = 0
     if @allFeedback
       context.allFeedback = (m.attributes for m in @allFeedback.models when @allFeedback.models.length < 20 or m.get('review'))
-      context.averageRating = _.reduce((m.get('rating') for m in @allFeedback.models), (acc, x) -> acc + (x ? 5)) / (@allFeedback.models.length or 1)
+      context.averageRating = _.reduce((m.get('rating') for m in @allFeedback.models), (acc, x) -> acc + (x ? 5)) / (@allFeedback.models.length)
       context.totalRatings = @allFeedback.models.length
     else
-      context.allFeedback = []
-      context.averageRating = 0
-      context.totalRatings = 0
       context.loading = true
-    context.moment = moment
     context
 
   onViewSwitched: (e) ->

app/views/editor/level/treema_nodes.coffee

@@ -200,6 +200,9 @@ module.exports.AccelerationNode = class AccelerationNode extends TreemaNode.node
 
 module.exports.ThangTypeNode = class ThangTypeNode extends TreemaNode.nodeMap.string
   valueClass: 'treema-thang-type'
+  @thangTypes: null
+  @thangTypesCollection: null
+
   constructor: (args...) ->
     super args...
     data = @getData()
@@ -223,63 +226,68 @@ module.exports.ThangTypeNode = class ThangTypeNode extends TreemaNode.nodeMap.st
     else
       @data = null
 
-module.exports.ItemThangTypeNode = ItemThangTypeNode = class ItemThangTypeNode extends TreemaNode.nodeMap.string
-  valueClass: 'treema-item-thang-type'
-  @items: null
-  @itemsCollection: null
+module.exports.ThangTypeNode = ThangTypeNode = class ThangTypeNode extends TreemaNode.nodeMap.string
+  valueClass: 'treema-thang-type'
+  @thangTypesCollection: null  # Lives in ThangTypeNode parent class
+  @thangTypes: null  # Lives in ThangTypeNode or subclasses
 
   constructor: ->
     super(arguments...)
-    @getItems() 
-    unless ItemThangTypeNode.itemsCollection.loaded
-      ItemThangTypeNode.itemsCollection.once('sync', @refreshDisplay, @)
-     
+    @getThangTypes()
+    unless ThangTypeNode.thangTypesCollection.loaded
+      ThangTypeNode.thangTypesCollection.once('sync', @refreshDisplay, @)
+
   buildValueForDisplay: (valEl, data) ->
-    @buildValueForDisplaySimply(valEl, @getCurrentItem() or '')
+    @buildValueForDisplaySimply(valEl, @getCurrentThangType() or '')
     valEl
-    
+
   buildValueForEditing: (valEl, data) ->
     super(valEl, data)
-    if ItemThangTypeNode.items
-      source = (item.name for item in ItemThangTypeNode.items when @keyForParent in item.slots)
-      input = valEl.find('input').autocomplete(source: source, minLength: 0, delay: 0, autoFocus: true)
-    input.val(@getCurrentItem() or '')
+    input = valEl.find 'input'
+    if @constructor.thangTypes
+      source = (thangType.name for thangType in @constructor.thangTypes when @filterThangType thangType)
+      input.autocomplete(source: source, minLength: 0, delay: 0, autoFocus: true)
+    input.val(@getCurrentThangType() or '')
     valEl
-    
-  getCurrentItem: ->
-    window.itemData = @getData()
-    window.items = ItemThangTypeNode.items
-    return null unless ItemThangTypeNode.items
-    original = @getData()
-    return null unless original
-    item = _.find ItemThangTypeNode.items, { original: original }
-    item?.name or '...'
-    
-  getItems: ->
-    return if ItemThangTypeNode.itemsCollection
-    ItemThangTypeNode.itemsCollection = new CocoCollection([], {
+
+  filterThangType: (thangType) -> true
+
+  getCurrentThangType: ->
+    return null unless @constructor.thangTypes
+    return null unless original = @getData()
+    thangType = _.find @constructor.thangTypes, { original: original }
+    thangType?.name or '...'
+
+  getThangTypes: ->
+    return if ThangTypeNode.thangTypesCollection
+    ThangTypeNode.thangTypesCollection = new CocoCollection([], {
       url: '/db/thang.type'
       project:['name', 'components', 'original']
       model: ThangType
     })
-    res = ItemThangTypeNode.itemsCollection.fetch()
-    ItemThangTypeNode.itemsCollection.once 'sync', => @processItems(ItemThangTypeNode.itemsCollection)
-    
-  processItems: (itemCollection) ->
-    ItemThangTypeNode.items = []
-    for itemThang in itemCollection.models
-      itemComponent = _.find itemThang.get('components'), {original: LevelComponent.ItemID}
-      continue unless itemComponent
-      slots = itemComponent.config?.slots
-      continue unless slots?.length
-      ItemThangTypeNode.items.push {
-        name: itemThang.get('name')
-        original: itemThang.get('original')
-        slots: slots
-      }
+    res = ThangTypeNode.thangTypesCollection.fetch()
+    ThangTypeNode.thangTypesCollection.once 'sync', => @processThangTypes(ThangTypeNode.thangTypesCollection)
+
+  processThangTypes: (thangTypeCollection) ->
+    @constructor.thangTypes = []
+    @processThangType thangType for thangType in thangTypeCollection.models
+
+  processThangType: (thangType) ->
+    @constructor.thangTypes.push name: thangType.get('name'), original: thangType.get('original')
 
   saveChanges: ->
     thangTypeName = @$el.find('input').val()
-    item = _.find(ItemThangTypeNode.items, {name: thangTypeName})
-    return @remove() unless item
-    @data = item.original
+    thangType = _.find(@constructor.thangTypes, {name: thangTypeName})
+    return @remove() unless thangType
+    @data = thangType.original
+
+module.exports.ItemThangTypeNode = ItemThangTypeNode = class ItemThangTypeNode extends ThangTypeNode
+  valueClass: 'treema-item-thang-type'
+
+  filterThangType: (thangType) ->
+    @keyForParent in thangType.slots
+
+  processThangType: (thangType) ->
+    return unless itemComponent = _.find thangType.get('components'), {original: LevelComponent.ItemID}
+    return unless itemComponent.config?.slots?.length
+    @constructor.thangTypes.push name: thangType.get('name'), original: thangType.get('original'), slots: itemComponent.config.slots