Return full URLs in review serializer for both post and topic

Return full URLs, this fixes reviewable links to support subfolder

app/serializers/reviewable_serializer.rb

@@ -106,7 +106,7 @@ class ReviewableSerializer < ApplicationSerializer
   end
 
   def target_url
-    return object.target.url if object.target.is_a?(Post) && object.target.present?
+    return Discourse.base_url + object.target.url if object.target.is_a?(Post) && object.target.present?
     topic_url
   end
 

spec/serializers/reviewable_serializer_spec.rb

@@ -37,7 +37,7 @@ describe ReviewableSerializer do
     it "links to the flagged post" do
       fp = Fabricate(:reviewable_flagged_post)
       json = described_class.new(fp, scope: Guardian.new(admin), root: nil).as_json
-      expect(json[:target_url]).to eq(fp.post.url)
+      expect(json[:target_url]).to eq(Discourse.base_url + fp.post.url)
       expect(json[:topic_url]).to eq(fp.topic.url)
     end