Commit on top of https://github.com/CodiTramuntana/decidim-module-action_delegator/pull/1

improvement.patch

commit b5680a7effab8bb9f1b1542366b6dad36fe23611
Author: Pau Perez <saulopefa@gmail.com>
Date:   Thu Jan 7 11:21:00 2021 +0100

    Turn to 2 queries into one with another INNER JOIN
    
    There's no need to fetch the votes' authors first if we can scope the
    query to the votes' records we care about in a single statement.
    Letting the DB do its job results in less code on our side and better
    performance. We skip Ruby CPU cycles and a network round trip for each
    query.

diff --git a/app/queries/decidim/action_delegator/delegates_votes.rb b/app/queries/decidim/action_delegator/delegates_votes.rb
index 9035a27..1a04a59 100644
--- a/app/queries/decidim/action_delegator/delegates_votes.rb
+++ b/app/queries/decidim/action_delegator/delegates_votes.rb
@@ -3,17 +3,12 @@
 module Decidim
   module ActionDelegator
     class DelegatesVotes < Rectify::Query
-      def initialize(authors_ids_votes = nil)
-        @authors_ids_votes = authors_ids_votes
-      end
-
       def query
         Decidim::User
           .joins("INNER JOIN decidim_action_delegator_delegations
                     ON decidim_users.id = decidim_action_delegator_delegations.granter_id
                   INNER JOIN decidim_consultations_votes
                     ON decidim_consultations_votes.decidim_author_id = decidim_action_delegator_delegations.granter_id")
-          .where(decidim_action_delegator_delegations: { granter_id: authors_ids_votes })
       end
 
       private
diff --git a/app/queries/decidim/action_delegator/delegates_votes_by_consultation.rb b/app/queries/decidim/action_delegator/delegates_votes_by_consultation.rb
index 2ef72b6..56405b5 100644
--- a/app/queries/decidim/action_delegator/delegates_votes_by_consultation.rb
+++ b/app/queries/decidim/action_delegator/delegates_votes_by_consultation.rb
@@ -3,25 +3,27 @@
 module Decidim
   module ActionDelegator
     class DelegatesVotesByConsultation < Rectify::Query
-      def initialize(consultation, relation = nil)
-        @relation = relation.presence || Decidim::ActionDelegator::DelegatesVotes
+      def initialize(consultation, relation = Decidim::ActionDelegator::DelegatesVotes)
+        @relation = relation
         @consultation = consultation
       end
 
       def query
-        authors_ids_votes = Decidim::Consultations::Vote
-                            .joins("INNER JOIN decidim_consultations_questions
-                                        ON decidim_consultations_votes.decidim_consultation_question_id = decidim_consultations_questions.id
-                                      INNER JOIN decidim_consultations
-                                        ON decidim_consultations.id = decidim_consultations_questions.decidim_consultation_id")
-                            .where(decidim_consultations: { id: consultation.id })
-                            .pluck(:decidim_author_id)
-        relation.new(authors_ids_votes).query.count
+        relation.new.query.merge(consultation_votes).count
       end
 
       private
 
       attr_reader :consultation, :relation
+
+      def consultation_votes
+        Decidim::Consultations::Vote
+          .joins("INNER JOIN decidim_consultations_questions
+                    ON decidim_consultations_votes.decidim_consultation_question_id = decidim_consultations_questions.id
+                  INNER JOIN decidim_consultations
+                    ON decidim_consultations.id = decidim_consultations_questions.decidim_consultation_id")
+          .where(decidim_consultations: { id: consultation.id })
+      end
     end
   end
 end
diff --git a/app/queries/decidim/action_delegator/delegates_votes_by_question.rb b/app/queries/decidim/action_delegator/delegates_votes_by_question.rb
index 256c8d2..27f6c23 100644
--- a/app/queries/decidim/action_delegator/delegates_votes_by_question.rb
+++ b/app/queries/decidim/action_delegator/delegates_votes_by_question.rb
@@ -3,18 +3,18 @@
 module Decidim
   module ActionDelegator
     class DelegatesVotesByQuestion < Rectify::Query
-      def initialize(question, relation = nil)
-        @authors_ids_votes = question.votes.pluck(:decidim_author_id)
-        @relation = relation.presence || Decidim::ActionDelegator::DelegatesVotes
+      def initialize(question, relation = Decidim::ActionDelegator::DelegatesVotes)
+        @question = question
+        @relation = relation
       end
 
       def query
-        relation.new(authors_ids_votes).query.distinct.count
+        relation.new.query.merge(question.votes).distinct.count
       end
 
       private
 
-      attr_reader :authors_ids_votes, :relation
+      attr_reader :question, :relation
     end
   end
 end
diff --git a/spec/queries/decidim/action_delegator/delegates_votes_by_consultation_spec.rb b/spec/queries/decidim/action_delegator/delegates_votes_by_consultation_spec.rb
index 602621f..b07e52d 100644
--- a/spec/queries/decidim/action_delegator/delegates_votes_by_consultation_spec.rb
+++ b/spec/queries/decidim/action_delegator/delegates_votes_by_consultation_spec.rb
@@ -14,9 +14,13 @@ describe Decidim::ActionDelegator::DelegatesVotesByConsultation do
   let!(:delegation) { create(:delegation, setting: setting, granter: granter) }
   let!(:delegated_vote) { create(:vote, author: granter, question: question) }
 
+  let(:another_granter) { create(:user, organization: organization) }
+  let!(:another_delegation) { create(:delegation, setting: setting, granter: another_granter) }
+  let!(:another_delegated_vote) { create(:vote, author: another_granter, question: question) }
+
   describe "#query" do
     it "total votes count is correct" do
-      expect(subject.query).to eq(1)
+      expect(subject.query).to eq(2)
     end
   end
 end
diff --git a/spec/queries/decidim/action_delegator/delegates_votes_by_question_spec.rb b/spec/queries/decidim/action_delegator/delegates_votes_by_question_spec.rb
index bd8a87a..af727eb 100644
--- a/spec/queries/decidim/action_delegator/delegates_votes_by_question_spec.rb
+++ b/spec/queries/decidim/action_delegator/delegates_votes_by_question_spec.rb
@@ -14,9 +14,13 @@ describe Decidim::ActionDelegator::DelegatesVotesByQuestion do
   let!(:delegation) { create(:delegation, setting: setting, granter: granter) }
   let!(:delegated_vote) { create(:vote, author: granter, question: question) }
 
+  let(:another_granter) { create(:user, organization: organization) }
+  let!(:another_delegation) { create(:delegation, setting: setting, granter: another_granter) }
+  let!(:another_delegated_vote) { create(:vote, author: another_granter, question: question) }
+
   describe "#query" do
     it "total votes count is correct" do
-      expect(subject.query).to eq(1)
+      expect(subject.query).to eq(2)
     end
   end
 end