usda linking

app/controllers/ingredients_controller.rb

@@ -1,6 +1,6 @@
 class IngredientsController < ApplicationController
 
-  before_action :set_ingredient, only: [:edit, :update, :destroy, :select_ndbn]
+  before_action :set_ingredient, only: [:edit, :update, :destroy]
 
   before_filter :ensure_valid_user, only: [:new, :edit, :create, :update, :destroy]
 
@@ -64,7 +64,14 @@ class IngredientsController < ApplicationController
   end
 
   def select_ndbn
+    if params[:id].present?
+      @ingredient = Ingredient.find(params[:id])
+    else
+      @ingredient = Ingredient.new
+    end
+
     @ingredient.assign_attributes(ingredient_params)
+
     if @ingredient.ndbn.present?
       @ingredient.set_usda_food(UsdaFood.find_by_ndbn(@ingredient.ndbn))
     end

config/routes.rb

@@ -16,12 +16,10 @@ Rails.application.routes.draw do
         get :convert
       end
     end
-
-    member do
-      match :select_ndbn, via: [:post, :patch, :put]
-    end
   end
 
+  match '/ingredients(/:id)/select_ndbn' => 'ingredients#select_ndbn', via: [:post, :patch, :put]
+
   resource :user, only: [:new, :create, :edit, :update]
 
   get '/login' => 'users#login', as: :login