{"action":"created","comment":{"url":"https://api.github.com/repos/loomio/loomio/pulls/comments/26341177","id":26341177,"diff_hunk":"@@ -11,9 +11,10 @@ class DiscussionReader < ActiveRecord::Base\n \n   def self.for(user: nil, discussion: nil)\n     if user.is_logged_in?\n-      where(user_id: user.id, discussion_id: discussion.id).first_or_initialize do |dr|\n-        dr.discussion = discussion\n-        dr.user = user\n+      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fyi: found this approach to making this thread safe:\r\n\r\nhttp://www.rubydoc.info/docs/rails/ActiveRecord/Relation:find_or_create_by\r\n\r\nSee the bottom of the doc, above the 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