add summary for the nodes

app/assets/stylesheets/application.scss

@@ -257,7 +257,7 @@ button {
   }
 }
 
-.nodes-summary {
+.nodes-list {
   font-size: 80%;
   ul {
     text-align: left;
@@ -277,6 +277,13 @@ button {
   }
 }
 
+.node {
+  .node-summary {
+    margin: 10px 0;
+    font-size: 80%;
+  }
+}
+
 .control-pad {
   display: block;
   text-align: center;

app/controllers/posts_controller.rb

@@ -4,10 +4,9 @@ class PostsController < ApplicationController
 
   def index
     @query_page = (params[:page] || '1').to_i
-    @query_node = params[:node_id].to_i if params[:node_id]
     conditions = {}
-    conditions[:user] = User.find(params[:user_id]) if params[:user_id]
-    conditions[:node] = Node.find(params[:node_id]) if params[:node_id]
+    @query_user = conditions[:user] = User.find(params[:user_id]) if params[:user_id]
+    @query_node = conditions[:node] = Node.find(params[:node_id]) if params[:node_id]
     @pages_total = (Post.where(conditions).count / posts_limit.to_f).ceil
     @posts = Post.order(id: :desc).where(conditions).limit(posts_limit).offset((@query_page - 1) * posts_limit)
     @nodes = Node.all

app/models/node.rb

@@ -1,4 +1,5 @@
 class Node < ActiveRecord::Base
   has_many :posts
   validates :name, presence: true
+  validates :summary, presence: true
 end

app/views/posts/index.html.erb

@@ -1,17 +1,23 @@
 <div class="posts">
-  <div class="nodes-summary">
-    <ul>
-    <% @nodes.each do |node| %>
-      <% if node.id == @query_node %>
-      <li class="selected">
-      <% else %>
-      <li>
+  <% if @query_user.nil? && @query_node.nil? %>
+    <div class="nodes-list">
+      <ul>
+      <% @nodes.each do |node| %>
+        <li>
+          <span><a href="/?node_id=<%= node.id %>"><%= node.name %></a></span>
+        </li>
       <% end %>
-        <span><a href="/?node_id=<%= node.id %>"><%= node.name %></a></span>
-      </li>
+      </ul>
+    </div>
+  <% else %>
+    <% if !@query_node.nil? %>
+      <div class="node">
+        <div class="node-name"><%= @query_node.name %></div>
+        <div class="node-summary"><%= @query_node.summary %></div>
+      </div>
     <% end %>
-    </ul>
-  </div>
+  <% end %>
+ 
 
   <% @posts.each do |post| %>
     <div class="post-summary">

db/migrate/20160813062205_add_summary_to_nodes.rb

@@ -0,0 +1,5 @@
+class AddSummaryToNodes < ActiveRecord::Migration
+  def change
+    add_column :nodes, :summary, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160724083228) do
+ActiveRecord::Schema.define(version: 20160813062205) do
 
   create_table "comments", force: :cascade do |t|
     t.text     "body"
@@ -40,6 +40,7 @@
     t.string   "name"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string   "summary"
   end
 
   create_table "posts", force: :cascade do |t|