Enabled mods if needed to match requested URL

src/scripts/models/item_page.coffee

@@ -34,7 +34,7 @@ module.exports = class ItemPage extends BaseModel
         if not @params?.name?
             @params = null
         else
-            item = @modPack.findItemByName @params.name
+            item = @modPack.findItemByName @params.name, enableAsNeeded:true
             return unless item? and item.isCraftable
 
             quantity = if @params.quantity? then parseInt(@params.quantity) else 1

src/scripts/models/mod.coffee

@@ -64,14 +64,19 @@ module.exports = class Mod extends BaseModel
 
     findItem: (slug, options={})->
         options.includeDisabled ?= false
+        options.enableAsNeeded  ?= false
 
         if not options.includeDisabled
             return unless @_activeModVersion?
             return @_activeModVersion.findItem slug
         else
             for modVersion in @_modVersions
+                modVersion.fetch()
+
                 item = modVersion.findItem slug
-                return item if item?
+                if item?
+                    if options.enableAsNeeded then @setActiveVersion modVersion.version
+                    return item
 
         return null
 
@@ -121,6 +126,8 @@ module.exports = class Mod extends BaseModel
         return @_activeVersion
 
     setActiveVersion: (version)->
+        return if version is @_activeVersion
+
         version ?= Mod.Version.None
         if version is Mod.Version.Latest then version = _.last(@_modVersions).version
 

src/scripts/models/mod_pack.coffee

@@ -32,12 +32,14 @@ module.exports = class ModPack extends BaseModel
 
         return null
 
-    findItemByName: (name)->
-        slug = _.slugify name
+    findItemByName: (name, options={})->
+        options.enableAsNeeded ?= false
+        options.includeDisabled = true if options.enableAsNeeded
 
+        slug = _.slugify name
         for mod in @_mods
-            continue unless mod.enabled?
-            item = mod.findItem slug
+            continue unless mod.enabled or options.includeDisabled
+            item = mod.findItem slug, options
             return item if item?
 
         return null