Added a way to list the product drive participants for a product drive

app/models/product_drive.rb

@@ -26,6 +26,7 @@ class ProductDrive < ApplicationRecord
   }
 
   has_many :donations, dependent: :nullify
+  has_many :product_drive_participants, -> { distinct }, through: :donations
   validates :name, presence:
     { message: "A name must be chosen." }
   validates :start_date, presence:

app/models/product_drive_participant.rb

@@ -31,6 +31,10 @@ def volume
     donations.map { |d| d.line_items.total }.reduce(:+)
   end
 
+  def volume_by_product_drive(product_drive_id)
+    donations.by_product_drive(product_drive_id).map { |d| d.line_items.total }.sum
+  end
+
   def donation_source_view
     return if contact_name.blank?
 

app/views/product_drives/show.html.erb

@@ -100,3 +100,48 @@
     </div>
   </div>
 </section>
+
+<section class="content">
+  <div class="container-fluid">
+    <div class="row">
+      <div class="col-12">
+        <!-- Default box -->
+        <div class="card">
+          <div class="card-body p-0">
+            <table class="table">
+              <thead>
+              <tr>
+                <th>Business Name</th>
+                <th>Contact Name</th>
+                <th>Phone</th>
+                <th>Email</th>
+                <th>Address</th>
+                <th>Items for this Drive</th>
+                <th>Total Items (for all drives)</th>
+                <th>Comment</th>
+              </tr>
+              </thead>
+              <tbody>
+              <% @product_drive.product_drive_participants.each do |participant| %>
+                <tr>
+                  <td><%= participant.business_name %></td>
+                  <td><%= participant.contact_name %></td>
+                  <td><%= participant.phone %></td>
+                  <td><%= participant.email %></td>
+                  <td><%= participant.address %></td>
+                  <td><%= participant.volume_by_product_drive(@product_drive.id) %></td>
+                  <td><%= participant.volume %></td>
+                  <td><%= participant.comment %></td>
+                </tr>
+              <% end%>
+              </tbody>
+            </table>
+          </div>
+          <!-- /.card-body -->
+          <!-- /.card-footer-->
+        </div>
+        <!-- /.card -->
+      </div>
+    </div>
+  </div>
+</section>

spec/models/product_drive_participant_spec.rb

@@ -35,14 +35,27 @@
 
   context "Methods" do
     describe "volume" do
-      it "retrieves the amount of product that has been donated through this product drive" do
+      it "retrieves the amount of product that has been donated by participant" do
         dd = create(:product_drive)
         ddp = create(:product_drive_participant)
         create(:donation, :with_items, item_quantity: 10, source: Donation::SOURCES[:product_drive], product_drive: dd, product_drive_participant: ddp)
         expect(ddp.volume).to eq(10)
       end
     end
 
+    describe "volume_by_product_drive" do
+      it "retrieves the amount of product that has been donated through specific product drive" do
+        drive1 = create(:product_drive)
+        drive2 = create(:product_drive)
+        participant = create(:product_drive_participant)
+        create(:donation, :with_items, item_quantity: 10, source: Donation::SOURCES[:product_drive], product_drive: drive1, product_drive_participant: participant)
+        create(:donation, :with_items, item_quantity: 9, source: Donation::SOURCES[:product_drive], product_drive: drive2, product_drive_participant: participant)
+        expect(participant.volume).to eq(19)
+        expect(participant.volume_by_product_drive(drive1.id)).to eq(10)
+        expect(participant.volume_by_product_drive(drive2.id)).to eq(9)
+      end
+    end
+
     describe "donation_source_view" do
       let!(:participant) { create(:product_drive_participant, contact_name: contact_name) }
 

spec/models/product_drive_spec.rb

@@ -49,14 +49,23 @@
   end
 
   describe "associations" do
-    let!(:donation) { create(:donation) }
+    let!(:product_drive_participant) { create(:product_drive_participant) }
+    let!(:donation) { create(:product_drive_donation, product_drive_participant: product_drive_participant) }
+    let!(:product_drive2) { create(:product_drive) }
+    let!(:donation2) { create(:donation, :with_items, item_quantity: 7, product_drive: product_drive2, product_drive_participant: product_drive_participant) }
+
     subject { create(:product_drive) }
 
     it "has_many donations" do
       subject.donations << donation
 
       expect(subject.donations).to include(donation)
     end
+    it "has_many product_drive_participants through donations" do
+      subject.donations << donation
+      is_expected.to have_many(:product_drive_participants).through(:donations)
+      expect(subject.product_drive_participants).to include(donation.product_drive_participant)
+    end
   end
 
   describe "distinct_items" do