def get_nearby(cls, lng, lat, user_id):
# get a list of the user's Facebook friends; tags authored by
# friends are ranked higher
friends = yield UsersModel.get_friends(user_id)
# add the user to the friends list; tags created by the user should
# also rank higher
friends.add(user_id)
# Query the database for tags, performing as much of the query
# algorithm in the database as possible for efficiency. Returns a list
# of the highest scoring tags that appears within a query radius.
tags = yield sundowner.data.content.get_nearby(
lng, lat, friends, cls._BATCH_SIZE_DB_FRIENDS,
cls._BATCH_SIZE_DB_FINAL)
# Now perform LIGHTWEIGHT manipulation of the database results before
# they're returned. Only manipulations that couldn't be performed in
# the database should be done here:
# allow the tag's distance from the query location to influence the
# sort order
tags = _DistanceSorter.sort(lng, lat, tags, cls._BATCH_SIZE_RESULT)
# Author data for tags not created by friends is not shown, but author
# data for tags created by friends needs to be retrieved from the
# `Users` collection. Tags created by the used have a special 'self'
# username (eg 'Me').
friend_user_ids = set()
usernames = {}
for tag in tags:
if tag["score"]["friend"]:
if tag["user_id"] == user_id:
usernames[user_id] = cls._SELF_USERNAME
else:
friend_user_ids.add(tag["user_id"])
friend_usernames = \
yield sundowner.data.users.get_usernames(friend_user_ids)
usernames.update(friend_usernames)
# format and return the result
result = []
for tag in tags:
entry = {
"id": str(tag["_id"]),
"text": tag["text"],
"score": tag["score"],
}
if tag["url"]:
entry["url"] = tag["url"]
if tag["score"]["friend"]:
entry["username"] = usernames[tag["user_id"]]
result.append(entry)
raise tornado.gen.Return(result)
def test():
result = yield UsersModel.get_friends(pete)
raise tornado.gen.Return(result)
def test():
result = yield UsersModel.get_friends(pete)
raise tornado.gen.Return(result)
