Fix the request comments count

app/models/request.rb

@@ -563,6 +563,11 @@
   def manifest_processed!
   end
 
+  def self.get_all_comments(request)
+    counts = Comment.counts_for_requests([request])
+    counts[request.id]
+  end
+
   private
 
   def calculate_next_request_type_id

app/views/requests/show.html.erb

@@ -1,7 +1,7 @@
 
 <% add :about, "This page displays details of requests" %>
 <% add :menu, "View event history" => history_request_path(@request) -%>
-<% add :menu, (pluralize @request.comments.size, "comment") => request_comments_path(@request) -%>
+<% add :menu, (pluralize Request.get_all_comments(@request), "comment") => request_comments_path(@request) -%>
 
 <% if can?(:cancel, @request) && @request.try(:may_cancel_before_started?) %>
   <% add :menu, { "Cancel" => cancel_request_url(@request) }, { confirm: "Are you sure you want to cancel this request?" }  -%>

app/views/shared/_batch.html.erb

@@ -55,8 +55,8 @@
         <% end %>
 
         <td><%= request.state.humanize %></td>
-
-        <td><%= link_to (pluralize request.comments.size, 'comment'),  request_comments_url(request) %></td>
+        
+        <td><%= link_to (pluralize Request.get_all_comments(request), 'comment'),  request_comments_url(request) %></td>
 
       </tr>
     <% end -%>

spec/models/request_spec.rb

@@ -494,4 +494,21 @@
       expect(subject[request_type2].started).to eq(1)
     end
   end
+
+  describe '#get_all_comments' do
+    let(:labware) { create :labware }
+    let(:receptacle) { create :receptacle, labware: labware }
+    let(:request) { create :request, asset: receptacle }
+
+    before do
+      create :comment, commentable: labware, description: 'comment on labware'
+      create :comment, commentable: receptacle, description: 'comment on receptacle'
+      create :comment, commentable: request, description: 'first comment on request'
+      create :comment, commentable: request, description: 'second comment on request'
+    end
+
+    it 'returns all of the comments including associated labware, receptacle and request itself' do
+      expect(described_class.get_all_comments(request)).to eq(4)
+    end
+  end
 end