Merge branch 'feature/track-file-downloads' into staging

Author: tsubik

app/controllers/uploads_controller.rb

@@ -59,7 +59,7 @@ def ensure_valid_db_record
     raise_not_found_exception unless allowed_models.include?(@model_name)
 
     model_class = @model_name.classify.constantize
-    raise_not_found_exception unless model_class.uploaders.keys.map(&:to_s).include(@uploader_name) # ensure valid uploader
+    raise_not_found_exception unless model_class.uploaders.keys.map(&:to_s).include?(@uploader_name) # ensure valid uploader
 
     record = model_class.find(@record_id)
     uploader = record.public_send(@uploader_name)