API endpoints to load alt styles as JSON, and filter by species

Gonna use this in the app for the alt style picker! Still deciding on
the UI details.

app/controllers/alt_styles_controller.rb

@@ -1,6 +1,16 @@
 class AltStylesController < ApplicationController
 	def index
 		@alt_styles = AltStyle.includes(:species, :color, :swf_assets).
-			order(:species_id, :color_id).all
+			order(:species_id, :color_id)
+
+		if params[:species_id]
+			@species = Species.find(params[:species_id])
+			@alt_styles = @alt_styles.merge(@species.alt_styles)
+		end
+
+		respond_to do |format|
+			format.html { render }
+			format.json { render json: @alt_styles }
+		end
 	end
 end

app/models/species.rb

@@ -1,6 +1,7 @@
 class Species < ApplicationRecord
   translates # TODO: Remove once we're all done with translations!
   has_many :pet_types
+  has_many :alt_styles
   
   scope :alphabetical, -> { order(:name) }
 

config/routes.rb

@@ -31,6 +31,7 @@ OpenneoImpressItems::Application.routes.draw do
     resources :colors, only: [] do
       get :pet_type, to: 'pet_types#show'
     end
+    resources :alt_styles, path: 'alt-styles', only: [:index]
   end
   resources :colors, only: [] do
     resources :pet_types, only: [:index]