def create(cls, course_overview, course=None):
"""
Create thumbnail images for this CourseOverview.
This will save the CourseOverviewImageSet before it returns.
"""
from openedx.core.lib.courses import create_course_image_thumbnail
# If image thumbnails are not enabled, do nothing.
config = CourseOverviewImageConfig.current()
if not config.enabled:
return
# If a course object was provided, use that. Otherwise, pull it from
# CourseOverview's course_id. This happens because sometimes we are
# generated as part of the CourseOverview creation (course is available
# and passed in), and sometimes the CourseOverview already exists.
if not course:
course = modulestore().get_course(course_overview.id)
image_set = cls(course_overview=course_overview)
if course.course_image:
# Try to create a thumbnails of the course image. If this fails for any
# reason (weird format, non-standard URL, etc.), the URLs will default
# to being blank. No matter what happens, we don't want to bubble up
# a 500 -- an image_set is always optional.
try:
image_set.small_url = create_course_image_thumbnail(course, config.small)
image_set.large_url = create_course_image_thumbnail(course, config.large)
except Exception: # pylint: disable=broad-except
log.exception(
u"Could not create thumbnail for course %s with image %s (small=%s), (large=%s)",
course.id,
course.course_image,
config.small,
config.large
)
# Regardless of whether we created thumbnails or not, we need to save
# this record before returning. If no thumbnails were created (there was
# an error or the course has no source course_image), our url fields
# just keep their blank defaults.
try:
with transaction.atomic():
image_set.save()
course_overview.image_set = image_set
except (IntegrityError, ValueError):
# In the event of a race condition that tries to save two image sets
# to the same CourseOverview, we'll just silently pass on the one
# that fails. They should be the same data anyway.
#
# The ValueError above is to catch the following error that can
# happen in Django 1.8.4+ if the CourseOverview object fails to save
# (again, due to race condition).
#
# Example: ValueError: save() prohibited to prevent data loss due
# to unsaved related object 'course_overview'.")
pass
def create(cls, course_overview, course=None):
"""
Create thumbnail images for this CourseOverview.
This will save the CourseOverviewImageSet before it returns.
"""
from openedx.core.lib.courses import create_course_image_thumbnail
# If image thumbnails are not enabled, do nothing.
config = CourseOverviewImageConfig.current()
if not config.enabled:
return
# If a course object was provided, use that. Otherwise, pull it from
# CourseOverview's course_id. This happens because sometimes we are
# generated as part of the CourseOverview creation (course is available
# and passed in), and sometimes the CourseOverview already exists.
if not course:
course = modulestore().get_course(course_overview.id)
image_set = cls(course_overview=course_overview)
if course.course_image:
# Try to create a thumbnails of the course image. If this fails for any
# reason (weird format, non-standard URL, etc.), the URLs will default
# to being blank. No matter what happens, we don't want to bubble up
# a 500 -- an image_set is always optional.
try:
image_set.small_url = create_course_image_thumbnail(course, config.small)
image_set.large_url = create_course_image_thumbnail(course, config.large)
except Exception: # pylint: disable=broad-except
log.exception(
"Could not create thumbnail for course %s with image %s (small=%s), (large=%s)",
course.id,
course.course_image,
config.small,
config.large
)
# Regardless of whether we created thumbnails or not, we need to save
# this record before returning. If no thumbnails were created (there was
# an error or the course has no source course_image), our url fields
# just keep their blank defaults.
try:
with transaction.atomic():
image_set.save()
course_overview.image_set = image_set
except (IntegrityError, ValueError):
# In the event of a race condition that tries to save two image sets
# to the same CourseOverview, we'll just silently pass on the one
# that fails. They should be the same data anyway.
#
# The ValueError above is to catch the following error that can
# happen in Django 1.8.4+ if the CourseOverview object fails to save
# (again, due to race condition).
#
# Example: ValueError: save() prohibited to prevent data loss due
# to unsaved related object 'course_overview'.")
pass
