Add timestamps to Topic. Add fields on topic list.

app/controllers/topics_controller.rb

@@ -1,4 +1,5 @@
 class TopicsController < ApplicationController
+  # include CommentableActions
 
   before_action :set_community
 

app/views/topics/_topics.html.erb

@@ -6,6 +6,10 @@
   <% topics.each do |topic| %>
     <div id="<%= dom_id(topic) %>">
       <%= link_to topic.title, community_topic_path(@community, topic) %>
+      <br>
+      <%= topic.author.name %>
+      <br>
+      <%= I18n.l topic.created_at %>
       <% if topic.author == current_user %>
         <%= link_to t("topic.edit"), edit_community_topic_path(@community.id, topic), class: 'button expanded' %>
       <% end %>

app/views/topics/new.html.erb

@@ -1,5 +1,6 @@
 <div class="topic-new row">
   <div class="small-12 medium-9 column">
+    <%= render "shared/back_link" %>
     <h1><%= t("topic.create") %></h1>
 
     <%= render '/topics/form' %>

db/migrate/20170807082243_create_topics.rb

@@ -4,6 +4,7 @@ class CreateTopics < ActiveRecord::Migration
       t.string :title, null: false
       t.integer :author_id
       t.references :community, index: true
+      t.timestamps null: false
     end
   end
 end

db/schema.rb

@@ -891,9 +891,11 @@ ActiveRecord::Schema.define(version: 20170807082243) do
   add_index "tags", ["spending_proposals_count"], name: "index_tags_on_spending_proposals_count", using: :btree
 
   create_table "topics", force: :cascade do |t|
-    t.string  "title",        null: false
+    t.string   "title",        null: false
-    t.integer "author_id"
+    t.integer  "author_id"
-    t.integer "community_id"
+    t.integer  "community_id"
+    t.datetime "created_at",   null: false
+    t.datetime "updated_at",   null: false
   end
 
   add_index "topics", ["community_id"], name: "index_topics_on_community_id", using: :btree