Fixes bug with empty users (which are valid in draft requests) (#1987)

Author: hectorcorrea

app/presenters/request_presenter.rb

@@ -23,7 +23,7 @@ def data_manager
   end
 
   def full_name(uid)
-    return "" if uid.nil?
+    return "" if uid.blank?
     user = User.find_by(uid: uid)
     user.display_name_safe.to_s
   end

spec/presenters/request_presenter_spec.rb

@@ -88,6 +88,14 @@
     end
   end
 
+  describe "#data_manager empty" do
+    let(:current_user) { FactoryBot.create :user }
+    let(:request) { FactoryBot.create :request, data_manager: "" }
+    it "handles empty users correctly" do
+      expect(presenter.data_manager).to eq("")
+    end
+  end
+
   describe "#full_name" do
     let(:current_user) { FactoryBot.create :user }
     it "returns the full name for a valid uid" do