Make dependent strategy configurable

lib/acts_as_votable/extenders/votable.rb

@@ -4,6 +4,7 @@ module ActsAsVotable
   module Extenders
     module Votable
       ALLOWED_CACHEABLE_STRATEGIES = %i[update update_columns]
+      ALLOWED_DEPENDENT_STRATEGIES = %i[destroy_all delete_all]
 
       def votable?
         false
@@ -16,14 +17,19 @@ def acts_as_votable(args = {})
         if args.key?(:cacheable_strategy) && !ALLOWED_CACHEABLE_STRATEGIES.include?(args[:cacheable_strategy])
           raise ArgumentError, args[:cacheable_strategy]
         end
+
+        if args.key?(:dependent_strategy) && !ALLOWED_DEPENDENT_STRATEGIES.include?(args[:dependent_strategy])
+          raise ArgumentError, args[:dependent_strategy]
+        end
 
         define_method :acts_as_votable_options do
           self.class.instance_variable_get("@acts_as_votable_options")
         end
 
         class_eval do
           @acts_as_votable_options = {
-            cacheable_strategy: :update
+            cacheable_strategy: :update,
+            dependent_strategy: :delete_all
           }.merge(args)
 
           def self.votable?

lib/acts_as_votable/votable.rb

@@ -35,7 +35,7 @@ def self.included(base)
       }
 
       base.class_eval do
-        has_many :votes_for, class_name: "ActsAsVotable::Vote", as: :votable, dependent: :delete_all do
+        has_many :votes_for, class_name: "ActsAsVotable::Vote", as: :votable, dependent: acts_as_votable_options[:dependent_strategy] do
           def voters
             includes(:voter).map(&:voter)
           end
@@ -110,7 +110,7 @@ def unvote(args = {})
       votes = find_votes_by(args[:voter], args[:vote_scope])
 
       ActiveRecord::Base.transaction do
-        deleted_count = votes.delete_all
+        deleted_count = votes.send(acts_as_votable_options[:dependent_strategy])
         update_cached_votes(args[:vote_scope]) if deleted_count > 0
       end
       self.vote_registered = false

lib/acts_as_votable/voter.rb

@@ -18,7 +18,7 @@ def self.included(base)
 
       base.class_eval do
 
-        has_many :votes, class_name: "ActsAsVotable::Vote", as: :voter, dependent: :delete_all do
+        has_many :votes, class_name: "ActsAsVotable::Vote", as: :voter, dependent: acts_as_votable_options[:dependent_strategy] do
           def votables
             includes(:votable).map(&:votable)
           end