sg101: user_photos/s3.py annotate

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bgneal@718	1 """Module for all S3 related operations for the user_photos application."""
bgneal@718	2
bgneal@718	3 import logging
bgneal@718	4
bgneal@718	5 from django.conf import settings
bgneal@718	6
bgneal@718	7 from core.s3 import S3Bucket
bgneal@718	8
bgneal@718	9
bgneal@718	10 logger = logging.getLogger(__name__)
bgneal@718	11
bgneal@718	12
bgneal@718	13 def delete_photos(qs):
bgneal@718	14 """Delete the photos stored on S3 for the given Photo queryset.
bgneal@718	15
bgneal@718	16 Returns the number of photos actually deleted.
bgneal@718	17
bgneal@718	18 """
bgneal@718	19
bgneal@718	20 bucket = S3Bucket(settings.USER_PHOTOS_ACCESS_KEY,
bgneal@718	21 settings.USER_PHOTOS_SECRET_KEY,
bgneal@718	22 settings.USER_PHOTOS_BASE_URL,
bgneal@718	23 settings.USER_PHOTOS_BUCKET)
bgneal@718	24
bgneal@718	25 key_urls = []
bgneal@718	26 for photo in qs:
bgneal@718	27 key_urls.append(photo.url)
bgneal@718	28 key_urls.append(photo.thumb_url)
bgneal@718	29 req_cnt = len(key_urls)
bgneal@718	30
bgneal@718	31 logger.info("Requesting deletion of %d user photo(s) from S3", req_cnt)
bgneal@718	32
bgneal@718	33 act_cnt = bucket.delete_keys(key_urls)
bgneal@718	34
bgneal@718	35 if act_cnt == req_cnt:
bgneal@718	36 logger.info("Deleted %d user photo(s) from S3", act_cnt)
bgneal@718	37 else:
bgneal@718	38 logger.warning("Deleted %d user photo(s) out of %d", act_cnt, req_cnt)
bgneal@718	39
bgneal@718	40 return act_cnt

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