def migrating_cached_query(model, filter_fn=filter_identity):
"""Returns a CachedResults object that has a new-style cached query
attached as "new_query". This way, reads will happen from the old
query cache while writes can be made to go to both caches until a
backfill migration is complete."""
decorator = cached_query(model, filter_fn)
def migrating_cached_query_decorator(fn):
wrapped = decorator(fn)
def migrating_cached_query_wrapper(*args):
new_query = wrapped(*args)
old_query = make_results(new_query.query, filter_fn)
old_query.new_query = new_query
return old_query
return migrating_cached_query_wrapper
return migrating_cached_query_decorator
def migrating_cached_query(model, filter_fn=filter_identity):
"""Returns a CachedResults object that has a new-style cached query
attached as "new_query". This way, reads will happen from the old
query cache while writes can be made to go to both caches until a
backfill migration is complete."""
decorator = cached_query(model, filter_fn)
def migrating_cached_query_decorator(fn):
wrapped = decorator(fn)
def migrating_cached_query_wrapper(*args):
new_query = wrapped(*args)
old_query = make_results(new_query.query, filter_fn)
old_query.new_query = new_query
return old_query
return migrating_cached_query_wrapper
return migrating_cached_query_decorator
q = rel._query(rel.c._thing1_id == thing_id,
rel.c._t2_deleted == False,
rel.c._name == name,
sort = desc('_date'),
eager_load = True,
thing_data = not g.use_query_cache
)
if filters:
q._filter(*filters)
return q
vote_rel = Vote.rel(Account, Link)
cached_userrel_query = cached_query(UserQueryCache, filter_thing2)
cached_srrel_query = cached_query(SubredditQueryCache, filter_thing2)
migrating_cached_userrel_query = migrating_cached_query(UserQueryCache, filter_thing2)
migrating_cached_srrel_query = migrating_cached_query(SubredditQueryCache, filter_thing2)
@migrating_cached_userrel_query
def get_liked(user):
return rel_query(vote_rel, user, '1')
@migrating_cached_userrel_query
def get_disliked(user):
return rel_query(vote_rel, user, '-1')
@cached_userrel_query
def get_hidden(user):
return rel_query(SaveHide, user, 'hide')
q = rel._query(rel.c._thing1_id == thing_id,
rel.c._t2_deleted == False,
rel.c._name == name,
sort = desc('_date'),
eager_load = True,
thing_data = not g.use_query_cache
)
if filters:
q._filter(*filters)
return q
vote_rel = Vote.rel(Account, Link)
cached_userrel_query = cached_query(UserQueryCache, filter_thing2)
cached_srrel_query = cached_query(SubredditQueryCache, filter_thing2)
@cached_userrel_query
def get_liked(user):
return rel_query(vote_rel, user, '1')
@cached_userrel_query
def get_disliked(user):
return rel_query(vote_rel, user, '-1')
@cached_userrel_query
def get_hidden(user):
return rel_query(SaveHide, user, 'hide')
@cached_userrel_query
