Show related microposts on learning goals

app/models/learning_goal.rb

@@ -8,4 +8,10 @@ class LearningGoal < ApplicationRecord
 
   has_and_belongs_to_many :tags
   accepts_nested_attributes_for :tags
+
+  def microposts
+    microposts = Micropost.none
+    tags.each { |tag| microposts = microposts.or(tag.microposts) }
+    microposts
+  end
 end

app/views/learning_goals/show.html.erb

@@ -1,4 +1,5 @@
 <div id="learning_goal_<%= @learning_goal.id %>" class="learning_goal">
+  <%= link_to t(".edit"), edit_learning_goal_path(@learning_goal) if @learning_goal.user == current_user %>
   <h2><%= @learning_goal.title %></h2>
   <p><%= @learning_goal.starts_on %>-<%= @learning_goal.ends_on %></p>
   <h3><%= t(".description") %></h3>
@@ -7,5 +8,14 @@
     <h3><%= t(".retrospective") %></h3>
     <p><%= @learning_goal.retrospective %></p>
   <% end %>
-  <%= link_to t(".edit"), edit_learning_goal_path(@learning_goal) if @learning_goal.user == current_user %>
+
+  <h3><%= t(".tags") %></h3>
+  <ul>
+    <% @learning_goal.tags.each do |tag| %>
+      <li><%= link_to tag.name, tag %></li>
+    <% end %>
+  </ul>
+
+  <h3><%= t(".related_microposts") %></h3>
+  <p><%= render @learning_goal.microposts %></p>
 </div>

config/locales/views/learning_goals/en.yml

@@ -18,3 +18,5 @@ en:
       edit: Edit
       description: Description
       retrospective: Retrospective
+      tags: Tags
+      related_microposts: Related μposts