FIX: Safer scoring with concurrency

app/jobs/regular/create_user_reviewable.rb

@@ -23,14 +23,15 @@ class Jobs::CreateUserReviewable < Jobs::Base
           email: user.email
         }
       )
-      return if @reviewable.score > 0
 
-      @reviewable.add_score(
-        Discourse.system_user,
-        ReviewableScore.types[:needs_approval],
-        reason: reason,
-        force_review: true
-      )
+      if @reviewable.created_new
+        @reviewable.add_score(
+          Discourse.system_user,
+          ReviewableScore.types[:needs_approval],
+          reason: reason,
+          force_review: true
+        )
+      end
     end
   end
 end

app/models/reviewable.rb

@@ -15,6 +15,7 @@ class Reviewable < ActiveRecord::Base
     end
   end
 
+  attr_accessor :created_new
   validates_presence_of :type, :status, :created_by_id
   belongs_to :target, polymorphic: true
   belongs_to :created_by, class_name: 'User'
@@ -85,7 +86,7 @@ class Reviewable < ActiveRecord::Base
     topic = target.topic if topic.blank? && target.is_a?(Post)
     category_id = topic.category_id if topic.present?
 
-    create!(
+    reviewable = create!(
       target: target,
       target_created_by_id: target_created_by_id,
       topic: topic,
@@ -95,6 +96,9 @@ class Reviewable < ActiveRecord::Base
       payload: payload,
       potential_spam: potential_spam
     )
+    reviewable.created_new = true
+    reviewable
+
   rescue ActiveRecord::RecordNotUnique
 
     row_count = DB.exec(<<~SQL, status: statuses[:pending], id: target.id, type: target.class.name)