Update missing body ID prediction to handle, say, the Maraquan Mynci.

It turns out that some pets for seemingly nonstandard colors have the
standard body type anyway, and vice-versa. This implies that we should
stop relying on a color's standardness, but, for the time being, we've
just revised the prediction model:

Old model:
    * If I see a body_id, I find the corresponding color_ids, and it's wearable
      by all pet types with those color_ids.

New model:
    * If I see a body_id,
        * If it also belongs to a basic pet type, it's a standard body ID.
            * It therefore fits all pet types of standard color (if there's
              more than one body ID modeled already). (Not really,
              because of weird exceptions like Orange Chia. Should that be
              standard or not?)
        * If it doesn't also belong to a basic pet type, it's a nonstandard
          body ID.
            * It therefore only belongs to one color, and therefore the item
              fits all pet types of the same color.

app/models/item.rb

@@ -219,16 +219,12 @@ class Item < ActiveRecord::Base
                                    map(&:color_id)
   end
 
-  def modeled_colors
+  def basic_body_ids
-    @modeled_colors ||= Color.select([:id, :standard]).find(modeled_color_ids)
+    @basic_body_ids ||= begin
+      basic_color_ids ||= Color.select([:id]).basic.map(&:id)
+      PetType.select('DISTINCT body_id').
+        where(color_id: basic_color_ids).map(&:body_id)
     end
-
-  def modeled_standard_colors?
-    modeled_colors.any?(&:standard)
-  end
-
-  def modeled_nonstandard_colors
-    modeled_colors.reject(&:standard)
   end
 
   def predicted_body_ids
@@ -249,10 +245,23 @@ class Item < ActiveRecord::Base
       # all bodies of the same color. (To my knowledge, anyway. I'm not aware
       # of any exceptions.) So, let's find those bodies by first finding those
       # colors.
-      PetType.select('DISTINCT body_id').
+      basic_modeled_body_ids, nonbasic_modeled_body_ids = modeled_body_ids.
-              where(color_id: modeled_color_ids).
+        partition { |bi| basic_body_ids.include?(bi) }
+
+      output = []
+      if basic_modeled_body_ids.present?
+        output += basic_body_ids
+      end
+      if nonbasic_modeled_body_ids.present?
+        nonbasic_modeled_color_ids = PetType.select('DISTINCT color_id').
+          where(body_id: nonbasic_modeled_body_ids).
+          map(&:color_id)
+        output += PetType.select('DISTINCT body_id').
+          where(color_id: nonbasic_modeled_color_ids).
           map(&:body_id)
       end
+      output
+    end
   end
 
   def predicted_missing_body_ids
@@ -277,7 +286,7 @@ class Item < ActiveRecord::Base
 
   def predicted_missing_nonstandard_body_pet_types
     PetType.joins(:color).
-            where(body_id: predicted_missing_body_ids,
+            where(body_id: predicted_missing_body_ids - basic_body_ids,
                   colors: {standard: false})
   end
 

app/views/outfits/new.html.haml

@@ -71,10 +71,7 @@
     = latest_contribution_description(@latest_contribution)
     %abbr#latest-contribution-created-at{:title => @latest_contribution.created_at.getutc.iso8601}
 
-
--#
 #whats-new
-    -# TODO: i18n all the things
   -# TODO: cache this entire block? or just request newest items every time?
   - if @newest_unmodeled_items.present?
     #modeling-neopets-users{'data-usernames' => @neopets_usernames.to_json}