def add_relationship(rel):
# this condition is already tested for, but is so bad if it happens
# that there is an extra check here just in case.
if rel.originid == rel.relatedid:
return [ ]
origin = PenName.get_by_id(rel.originid) #intransaction
if not origin:
logging.warn("add_relationship origin pen not found: " +\
str(rel.originid))
return [ ]
related = PenName.get_by_id(rel.relatedid) #intransaction
if not related:
logging.warn("add_relationship related pen not found: " +\
str(rel.relatedid))
return [ ]
if not origin.following:
origin.following = 0
if not related.followers:
related.followers = 0
origin.following += 1
related.followers += 1
cached_put(origin)
cached_put(related)
cached_put(rel)
return [ origin, related, rel ]
def delete_relationship(rel):
origin = PenName.get_by_id(rel.originid) #intransaction
origin.following -= 1
related = PenName.get_by_id(rel.relatedid) #intransaction
related.followers -= 1
cached_put(origin)
cached_put(related)
cached_delete(rel.key().id(), Relationship)
return [ origin, related ]
