Use where.not instead of where(NOT IN)

This way we simplify the code a bit and reduce our usage of raw SQL.

app/controllers/proposals_controller.rb

@@ -158,7 +158,7 @@ class ProposalsController < ApplicationController
                               .sort_by_confidence_score.limit(Setting["featured_proposals_number"])
         if @featured_proposals.present?
           set_featured_proposal_votes(@featured_proposals)
-          @resources = @resources.where("proposals.id NOT IN (?)", @featured_proposals.map(&:id))
+          @resources = @resources.where.not(id: @featured_proposals)
         end
       end
     end

app/controllers/users_controller.rb

@@ -96,7 +96,7 @@ class UsersController < ApplicationController
       disabled_commentables << "Debate" unless Setting["process.debates"]
       disabled_commentables << "Budget::Investment" unless Setting["process.budgets"]
       if disabled_commentables.present?
-        all_user_comments.where("commentable_type NOT IN (?)", disabled_commentables)
+        all_user_comments.where.not(commentable_type: disabled_commentables)
       else
         all_user_comments
       end

db/dev_seeds/votes.rb

@@ -1,5 +1,5 @@
 section "Voting Debates, Proposals & Comments" do
-  not_org_users = User.where(["users.id NOT IN(?)", User.organizations.pluck(:id)])
+  not_org_users = User.where.not(id: User.organizations)
   100.times do
     voter  = not_org_users.level_two_or_three_verified.all.sample
     vote   = [true, false].sample

lib/user_segments.rb

@@ -45,9 +45,8 @@ class UserSegments
 
   def self.not_supported_on_current_budget
     author_ids(
-      User.where(
-                  "id NOT IN (?)",
-                  Vote.select(:voter_id).where(votable: current_budget_investments).distinct
+      User.where.not(
+        id: Vote.select(:voter_id).where(votable: current_budget_investments).distinct
       )
     )
   end