{"action":"created","comment":{"url":"https://api.github.com/repos/edx/edx-platform/pulls/comments/34682632","id":34682632,"diff_hunk":"@@ -1036,7 +1038,16 @@ def _get_release_date(xblock, user=None):\n     Returns the release date for the xblock, or None if the release date has never been set.\n     \"\"\"\n     # If year of start date is less than 1900 then reset the start date to DEFAULT_START_DATE\n-    if xblock.start.year < 1900 and user:\n+    reset_to_default = False\n+    try:\n+        if xblock.start.year < 1900:\n+            reset_to_default = True\n+    except ValueError:\n+        # for old mongo courses accessing start date call to_json() which raises ValueError","path":"cms/djangoapps/contentstore/views/item.py","position":28,"original_position":28,"commit_id":"f49fa4fc56196dfb8e1c6b8776bd1ec4d87ae114","original_commit_id":"f49fa4fc56196dfb8e1c6b8776bd1ec4d87ae114","user":{"login":"adampalay","id":2748698,"avatar_url":"https://avatars.githubusercontent.com/u/2748698?v=3","gravatar_id":"","url":"https://api.github.com/users/adampalay","html_url":"https://github.com/adampalay","followers_url":"https://api.github.com/users/adampalay/followers","following_url":"https://api.github.com/users/adampalay/following{/other_user}","gists_url":"https://api.github.com/users/adampalay/gists{/gist_id}","starred_url":"https://api.github.com/users/adampalay/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/adampalay/subscriptions","organizations_url":"https://api.github.com/users/adampalay/orgs","repos_url":"https://api.github.com/users/adampalay/repos","events_url":"https://api.github.com/users/adampalay/events{/privacy}","received_events_url":"https://api.github.com/users/adampalay/received_events","type":"User","site_admin":false},"body":"```\r\nfor old mongo courses, accessing the start attribute calls `to_json()`, which raises a `ValueError` for years < 1900.\r\n```","created_at":"2015-07-15T14:20:16Z","updated_at":"2015-07-15T14:20:16Z","html_url":"https://github.com/edx/edx-platform/pull/8819#discussion_r34682632","pull_request_url":"https://api.github.com/repos/edx/edx-platform/pulls/8819","_links":{"self":{"href":"https://api.github.com/repos/edx/edx-platform/pulls/comments/34682632"},"html":{"href":"https://github.com/edx/edx-platform/pull/8819#discussion_r34682632"},"pull_request":{"href":"https://api.github.com/repos/edx/edx-platform/pulls/8819"}}},"pull_request":{"url":"https://api.github.com/repos/edx/edx-platform/pulls/8819","id":39471260,"html_url":"https://github.com/edx/edx-platform/pull/8819","diff_url":"https://github.com/edx/edx-platform/pull/8819.diff","patch_url":"https://github.com/edx/edx-platform/pull/8819.patch","issue_url":"https://api.github.com/repos/edx/edx-platform/issues/8819","number":8819,"state":"open","locked":false,"title":"start-date-reset-to-DEFAULT_START_DATE","user":{"login":"Shrhawk","id":7054417,"avatar_url":"https://avatars.githubusercontent.com/u/7054417?v=3","gravatar_id":"","url":"https://api.github.com/users/Shrhawk","html_url":"https://github.com/Shrhawk","followers_url":"https://api.github.com/users/Shrhawk/followers","following_url":"https://api.github.com/users/Shrhawk/following{/other_user}","gists_url":"https://api.github.com/users/Shrhawk/gists{/gist_id}","starred_url":"https://api.github.com/users/Shrhawk/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Shrhawk/subscriptions","organizations_url":"https://api.github.com/users/Shrhawk/orgs","repos_url":"https://api.github.com/users/Shrhawk/repos","events_url":"https://api.github.com/users/Shrhawk/events{/privacy}","received_events_url":"https://api.github.com/users/Shrhawk/received_events","type":"User","site_admin":false},"body":"[TNL-2592](https://openedx.atlassian.net/browse/TNL-2592)\r\n\r\nIf the start date is smaller than 1900 then reset it to DEFAULT_START_DATE for both modulestores (split and  old 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