def update_video_image(edx_video_id, course_id, image_data, file_name):
"""
Update video image for an existing video.
NOTE: If `image_data` is None then `file_name` value will be used as it is, otherwise
a new file name is constructed based on uuid and extension from `file_name` value.
`image_data` will be None in case of course re-run and export.
Arguments:
image_data (InMemoryUploadedFile): Image data to be saved for a course video.
Returns:
course video image url
Raises:
Raises ValVideoNotFoundError if the CourseVideo cannot be retrieved.
"""
try:
course_video = CourseVideo.objects.select_related('video').get(
course_id=course_id, video__edx_video_id=edx_video_id)
except ObjectDoesNotExist:
error_message = u'VAL: CourseVideo not found for edx_video_id: {0} and course_id: {1}'.format(
edx_video_id, course_id)
raise ValVideoNotFoundError(error_message)
video_image, _ = VideoImage.create_or_update(course_video, file_name,
image_data)
return video_image.image_url()
def _get_video(edx_video_id):
"""
Get a Video instance, prefetching encoded video and course information.
Raises ValVideoNotFoundError if the video cannot be retrieved.
"""
try:
return Video.objects.prefetch_related(
"encoded_videos", "courses").get(edx_video_id=edx_video_id)
except Video.DoesNotExist:
error_message = u"Video not found for edx_video_id: {0}".format(
edx_video_id)
raise ValVideoNotFoundError(error_message)
except Exception:
error_message = u"Could not get edx_video_id: {0}".format(edx_video_id)
logger.exception(error_message)
raise ValInternalError(error_message)
def _get_video(edx_video_id):
"""
Get a Video instance, prefetching encoded video and course information.
Raises ValVideoNotFoundError if the video cannot be retrieved.
"""
try:
encoded_videos = EncodedVideo.objects.select_related("profile")
return Video.objects \
.prefetch_related(Prefetch("encoded_videos", queryset=encoded_videos)) \
.prefetch_related("courses") \
.get(edx_video_id=edx_video_id)
except Video.DoesNotExist as no_video_error:
error_message = f"Video not found for edx_video_id: {edx_video_id}"
raise ValVideoNotFoundError(error_message) from no_video_error
except Exception as exc:
error_message = f"Could not get edx_video_id: {edx_video_id}"
logger.exception(error_message)
raise ValInternalError(error_message) from exc
def update_video_status(edx_video_id, status):
"""
Update status for an existing video.
Args:
edx_video_id: ID of the video
status: video status
Raises:
Raises ValVideoNotFoundError if the video cannot be retrieved.
"""
try:
video = _get_video(edx_video_id)
except Video.DoesNotExist:
error_message = u"Video not found when trying to update video status with edx_video_id: {0}".format(
edx_video_id)
raise ValVideoNotFoundError(error_message)
video.status = status
video.save()
def update_video(video_data):
"""
Called on to update Video objects in the database
update_video is used to update Video objects by the given edx_video_id in the video_data.
Args:
video_data (dict):
{
url: api url to the video
edx_video_id: ID of the video
duration: Length of video in seconds
client_video_id: client ID of video
encoded_video: a list of EncodedVideo dicts
url: url of the video
file_size: size of the video in bytes
profile: ID of the profile
courses: Courses associated with this video
}
Raises:
Raises ValVideoNotFoundError if the video cannot be retrieved.
Raises ValCannotUpdateError if the video cannot be updated.
Returns the successfully updated Video object
"""
try:
video = _get_video(video_data.get("edx_video_id"))
except Video.DoesNotExist:
error_message = u"Video not found when trying to update video with edx_video_id: {0}".format(
video_data.get("edx_video_id"))
raise ValVideoNotFoundError(error_message)
serializer = VideoSerializer(video, data=video_data)
if serializer.is_valid():
serializer.save()
return video_data.get("edx_video_id")
else:
raise ValCannotUpdateError(serializer.errors)
