I have a course on edge.edx.org with some videos, and I exported the course and wanted to import to my Open edX instance (eucalyptus.1) but I would get this error:
2017-11-21 04:47:42,307 ERROR 3995 [xmodule.vertical_block] vertical_block.py:122 - Unable to load child when parsing Vertical. Continuing...
Traceback (most recent call last):
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/vertical_block.py", line 119, in definition_from_xml
child_block = system.process_xml(etree.tostring(child, encoding='unicode'))
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/modulestore/xml.py", line 196, in process_xml
id_manager,
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 1595, in xblock_from_node
block = block_class.parse_xml(node, self, keys, id_generator)
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/xml_module.py", line 559, in parse_xml
return super(XmlParserMixin, cls).parse_xml(node, runtime, keys, id_generator) # pylint: disable=bad-super-call
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 1074, in parse_xml
block = cls.from_xml(xml, runtime, id_generator)
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/video_module.py", line 527, in from_xml
field_data = cls._parse_video_xml(xml_object, id_generator)
File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/video_module.py", line 788, in _parse_video_xml
course_id=course_id
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/edxval/api.py", line 508, in import_from_xml
create_video(data)
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/edxval/api.py", line 104, in create_video
raise ValCannotCreateError(serializer.errors)
ValCannotCreateError: {'duration': [u'This field may not be null.'], 'edx_video_id': [u'This field may not be blank.'], 'client_video_id': [u'This field may not be null.']}
Upon inspecting the content of the video block in the exported XML file, I would see the differences between that one (edx.edx.org) and a course with video that I created and exported on my local instance (eucalyptus.1). The XML content for the video from Edge:
<video youtube="1.00:abc123123" url_name="123123123123" license="all-rights-reserved" display_name="TestVideo" download_track="true" download_video="false" edx_video_id="" html5_sources="[]" sub="abc123123" youtube_id_1_0="abc123123">
<video_asset/>
</video>
Video from local (eucalyptus.1) instance:
<video youtube="1.00:abc123123" url_name="123123123123" license="all-rights-reserved" display_name="TestVideo" download_track="true" download_video="false" html5_sources="[]" sub="abc123123" youtube_id_1_0="abc123123"/>
My question is, is it possible to import courses from a higher version of edX to a lower one (everything except the videos are imported correctly actually), and if not, is there a known workaround for this? Also, if the error says that the those fields may not be null, why are they set to null on the export in the first place?
