added errors to creating new rating

app/controllers/ratings_controller.rb

@@ -9,10 +9,15 @@ class RatingsController < ApplicationController
   end
 
   def create
-    rating = Rating.create params.require(:rating).permit(:score, :beer_id)
-    session[:last_rating] = "#{rating.beer.name} #{rating.score} points"
+    @rating = Rating.create params.require(:rating).permit(:score, :beer_id)
+    @rating.user = current_user
 
-    redirect_to ratings_path
+    if @rating.save
+      redirect_to user_path current_user
+    else
+      @beers = Beer.all
+      render :new, status: :unprocessable_entity
+    end
   end
 
   def destroy

app/views/ratings/new.html.erb

@@ -1,6 +1,18 @@
 <h2>Create new rating</h2>
 
 <%= form_for(@rating) do |f| %>
+  <% if @rating.errors.any? %>
+    <div style="color: red">
+      <h2><%= pluralize(user.errors.count, "error") %> prohibited this user from being saved:</h2>
+
+      <ul>
+        <% user.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
   <%= f.select :beer_id, options_from_collection_for_select(@beers, :id, :to_s) %>
   score: <%= f.number_field :score %>
   <%= f.submit %>

config/routes.rb

@@ -8,6 +8,7 @@ Rails.application.routes.draw do
   # root "articles#index"
   get '/', to: 'breweries#index'
   get 'signup', to: 'users#new'
+  get 'signin', to: 'sessions#new'
   delete 'signout', to: 'sessions#destroy'
   resources :ratings, only: [:index, :new, :create, :destroy]
   resource :session, only: [:new, :create, :destroy]