{"action":"created","comment":{"url":"https://api.github.com/repos/biocore/qiita/pulls/comments/34086444","id":34086444,"diff_hunk":"@@ -113,54 +115,62 @@ def exists(cls, name, version):\n         QiitaDBNotImplementedError\n             If the method is not overwritten by a subclass\n         \"\"\"\n-        conn_handler = SQLConnectionHandler()\n-        return conn_handler.execute_fetchone(\n-            \"SELECT EXISTS(SELECT * FROM qiita.{0} WHERE \"\n-            \"reference_name=%s AND reference_version=%s)\".format(cls._table),\n-            (name, version))[0]\n+        with TRN:\n+            sql = \"\"\"SELECT EXISTS(\n+                        SELECT * FROM qiita.{0}\n+                        WHERE reference_name=%s\n+                            AND reference_version=%s)\"\"\".format(cls._table)\n+            TRN.add(sql, [name, version])\n+            return TRN.execute_fetchlast()\n \n     @property\n     def name(self):\n-        conn_handler = SQLConnectionHandler()\n-        return conn_handler.execute_fetchone(\n-            \"SELECT reference_name FROM qiita.{0} WHERE \"\n-            \"reference_id = %s\".format(self._table), (self._id,))[0]\n-        _, basefp = get_mountpoint('reference')[0]\n+        with TRN:\n+            sql = \"\"\"SELECT reference_name FROM qiita.{0}","path":"qiita_db/reference.py","position":111,"original_position":111,"commit_id":"f95983dade1cb7ad75f5ba4f0db5d98beb21bded","original_commit_id":"59becaaea2ef95138a6e444d403b7077c88f0cdc","user":{"login":"squirrelo","id":3079066,"avatar_url":"https://avatars.githubusercontent.com/u/3079066?v=3","gravatar_id":"","url":"https://api.github.com/users/squirrelo","html_url":"https://github.com/squirrelo","followers_url":"https://api.github.com/users/squirrelo/followers","following_url":"https://api.github.com/users/squirrelo/following{/other_user}","gists_url":"https://api.github.com/users/squirrelo/gists{/gist_id}","starred_url":"https://api.github.com/users/squirrelo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/squirrelo/subscriptions","organizations_url":"https://api.github.com/users/squirrelo/orgs","repos_url":"https://api.github.com/users/squirrelo/repos","events_url":"https://api.github.com/users/squirrelo/events{/privacy}","received_events_url":"https://api.github.com/users/squirrelo/received_events","type":"User","site_admin":false},"body":"Ah, got it.","created_at":"2015-07-07T20:30:35Z","updated_at":"2015-07-07T20:30:35Z","html_url":"https://github.com/biocore/qiita/pull/1333#discussion_r34086444","pull_request_url":"https://api.github.com/repos/biocore/qiita/pulls/1333","_links":{"self":{"href":"https://api.github.com/repos/biocore/qiita/pulls/comments/34086444"},"html":{"href":"https://github.com/biocore/qiita/pull/1333#discussion_r34086444"},"pull_request":{"href":"https://api.github.com/repos/biocore/qiita/pulls/1333"}}},"pull_request":{"url":"https://api.github.com/repos/biocore/qiita/pulls/1333","id":39331946,"html_url":"https://github.com/biocore/qiita/pull/1333","diff_url":"https://github.com/biocore/qiita/pull/1333.diff","patch_url":"https://github.com/biocore/qiita/pull/1333.patch","issue_url":"https://api.github.com/repos/biocore/qiita/issues/1333","number":1333,"state":"open","locked":false,"title":"Transactionize the Study, StudyPerson and Reference","user":{"login":"josenavas","id":2501478,"avatar_url":"https://avatars.githubusercontent.com/u/2501478?v=3","gravatar_id":"","url":"https://api.github.com/users/josenavas","html_url":"https://github.com/josenavas","followers_url":"https://api.github.com/users/josenavas/followers","following_url":"https://api.github.com/users/josenavas/following{/other_user}","gists_url":"https://api.github.com/users/josenavas/gists{/gist_id}","starred_url":"https://api.github.com/users/josenavas/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/josenavas/subscriptions","organizations_url":"https://api.github.com/users/josenavas/orgs","repos_url":"https://api.github.com/users/josenavas/repos","events_url":"https://api.github.com/users/josenavas/events{/privacy}","received_events_url":"https://api.github.com/users/josenavas/received_events","type":"User","site_admin":false},"body":"Modifies the Study, StudyPerson and Reference objects to use transactions\r\n\r\nFew comments:\r\n - `Study.create` was not checking for duplicates. A check and a test have been added.\r\n - ~~`StudyPerson.create` was not raising duplicate error in case of duplicate, just returned the existing object. Changed for consistency with the rest of the system~~ If it doesn't return the already existent object there isn't a way to retrieve the existent one from the DB. Created an issue to solve later https://github.com/biocore/qiita/issues/1336\r\n - `StudyPerson.exists` was missing tests. 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