Work towards displaying list of zipcodes in Diaper app. (#294)

Author: Aliciawyse

app/models/partner.rb

@@ -249,7 +249,8 @@ def impact_metrics
     {
       families_served: families_served_count,
       children_served: children_served_count,
-      family_zipcodes: family_zipcodes_count
+      family_zipcodes: family_zipcodes_count,
+      family_zipcodes_list: family_zipcodes_list
     }
   end
 
@@ -293,4 +294,8 @@ def children_served_count
   def family_zipcodes_count
     families.pluck(:guardian_zip_code).uniq.count
   end
+
+  def family_zipcodes_list
+    families.pluck(:guardian_zip_code).uniq
+  end
 end

spec/models/partner_spec.rb

@@ -234,9 +234,12 @@
 
     it "returns a hash with family and children aggregate data" do
       partner = create(:partner, :with_families)
+      expect(partner.impact_metrics.size).to eq(4)
       expect(partner.impact_metrics[:families_served]).to eq(1)
       expect(partner.impact_metrics[:children_served]).to eq(1)
       expect(partner.impact_metrics[:family_zipcodes]).to eq(1)
+      expect(partner.impact_metrics[:family_zipcodes_list]).to be_a(Array)
+      expect(partner.impact_metrics[:family_zipcodes_list]).to eq(partner.families.pluck(:guardian_zip_code).uniq)
     end
   end
 end