separate-stat-query
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This commit is contained in:
2024-04-23 14:31:34 +03:00
parent 8e130027f0
commit 8436bc4305
12 changed files with 170 additions and 111 deletions

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@@ -10,39 +10,51 @@ from services.db import local_session
from services.logger import root_logger as logger
def add_topic_stat_columns(q):
aliased_shout_topic = aliased(ShoutTopic)
aliased_authors = aliased(ShoutAuthor)
aliased_followers = aliased(TopicFollower)
aliased_shout = aliased(Shout)
# shouts
q = q.outerjoin(aliased_shout_topic, aliased_shout_topic.topic == Topic.id)
q = q.add_columns(
func.count(distinct(aliased_shout_topic.shout)).label("shouts_stat")
def get_topic_shouts_stat(topic_id: int):
q = (
select(func.count(distinct(ShoutTopic.shout)))
.select_from(join(ShoutTopic, Shout, ShoutTopic.shout == Shout.id))
.filter(
and_(
ShoutTopic.topic == topic_id,
Shout.published_at.is_not(None),
Shout.deleted_at.is_(None),
)
)
)
[shouts_stat] = local_session().execute(q)
return shouts_stat or 0
def get_topic_authors_stat(topic_id: int):
# authors
q = q.outerjoin(
aliased_shout,
and_(
aliased_shout.id == aliased_shout_topic.shout,
aliased_shout.published_at.is_not(None),
aliased_shout.deleted_at.is_(None),
),
)
q = q.outerjoin(aliased_authors, aliased_shout.authors.any(id=aliased_authors.id))
q = q.add_columns(
func.count(distinct(aliased_authors.author)).label("authors_stat")
q = (
select(func.count(distinct(ShoutAuthor.author)))
.select_from(join(ShoutTopic, Shout, ShoutTopic.shout == Shout.id))
.join(ShoutAuthor, ShoutAuthor.shout == Shout.id)
.filter(
and_(
ShoutTopic.topic == topic_id,
Shout.published_at.is_not(None),
Shout.deleted_at.is_(None),
)
)
)
[authors_stat] = local_session().execute(q)
return authors_stat or 0
# followers
q = q.outerjoin(aliased_followers, aliased_followers.topic == Topic.id)
q = q.add_columns(
func.count(distinct(aliased_followers.follower)).label("followers_stat")
)
# comments
def get_topic_followers_stat(topic_id: int):
aliased_followers = aliased(TopicFollower)
q = select(func.count(distinct(aliased_followers.follower))).filter(
aliased_followers.topic == topic_id
)
with local_session() as session:
[followers_stat] = session.execute(q)
return followers_stat or 0
def get_topic_comments_stat(topic_id: int):
sub_comments = (
select(
Shout.id.label("shout_id"),
@@ -61,39 +73,48 @@ def add_topic_stat_columns(q):
.group_by(Shout.id)
.subquery()
)
q = q.outerjoin(sub_comments, aliased_shout_topic.shout == sub_comments.c.shout_id)
q = q.add_columns(
func.coalesce(sub_comments.c.comments_count, 0).label("comments_stat")
q = select(func.coalesce(func.sum(sub_comments.c.comments_count), 0)).filter(
ShoutTopic.topic == topic_id
)
group_list = [Topic.id, sub_comments.c.comments_count]
q = q.group_by(*group_list)
logger.debug(q)
return q
q = q.outerjoin(sub_comments, ShoutTopic.shout == sub_comments.c.shout_id)
[comments_stat] = local_session().execute(q)
return comments_stat or 0
def add_author_stat_columns(q):
def get_author_shouts_stat(author_id: int):
aliased_shout_author = aliased(ShoutAuthor)
q = select(func.count(distinct(aliased_shout_author.shout))).filter(
aliased_shout_author.author == author_id
)
with local_session() as session:
[shouts_stat] = session.execute(q)
return shouts_stat or 0
def get_author_authors_stat(author_id: int):
aliased_authors = aliased(AuthorFollower)
q = select(func.count(distinct(aliased_authors.author))).filter(
and_(
aliased_authors.follower == author_id,
aliased_authors.author != author_id,
)
)
with local_session() as session:
[authors_stat] = session.execute(q)
return authors_stat or 0
def get_author_followers_stat(author_id: int):
aliased_followers = aliased(AuthorFollower)
q = q.outerjoin(aliased_shout_author, aliased_shout_author.author == Author.id)
q = q.add_columns(
func.count(distinct(aliased_shout_author.shout)).label("shouts_stat")
q = select(func.count(distinct(aliased_followers.follower))).filter(
aliased_followers.author == author_id
)
with local_session() as session:
[followers_stat] = session.execute(q)
return followers_stat or 0
q = q.outerjoin(aliased_authors, aliased_authors.follower == Author.id)
q = q.add_columns(
func.count(distinct(aliased_authors.author)).label("authors_stat")
)
q = q.outerjoin(aliased_followers, aliased_followers.author == Author.id)
q = q.add_columns(
func.count(distinct(aliased_followers.follower)).label("followers_stat")
)
# Create a subquery for comments count
def get_author_comments_stat(author_id: int):
sub_comments = (
select(
Author.id, func.coalesce(func.count(Reaction.id)).label("comments_count")
@@ -109,37 +130,43 @@ def add_author_stat_columns(q):
.group_by(Author.id)
.subquery()
)
q = q.outerjoin(sub_comments, Author.id == sub_comments.c.id)
q = q.add_columns(sub_comments.c.comments_count)
group_list = [Author.id, sub_comments.c.comments_count]
q = q.group_by(*group_list)
return q
q = select(sub_comments.c.comments_count).filter(sub_comments.c.id == author_id)
with local_session() as session:
[comments_stat] = session.execute(q)
return comments_stat or 0
def get_with_stat(q):
records = []
try:
is_author = f"{q}".lower().startswith("select author")
is_topic = f"{q}".lower().startswith("select topic")
if is_author:
q = add_author_stat_columns(q)
elif is_topic:
q = add_topic_stat_columns(q)
f"{q}".lower().startswith("select topic")
result = []
with local_session() as session:
result = session.execute(q)
for cols in result:
entity = cols[0]
stat = dict()
stat["shouts"] = cols[1]
stat["authors"] = cols[2]
stat["followers"] = cols[3]
if is_author:
stat["comments"] = cols[4]
entity.stat = stat
records.append(entity)
for cols in result:
entity = cols[0]
stat = dict()
stat["shouts"] = (
get_author_shouts_stat(entity.id)
if is_author
else get_topic_shouts_stat(entity.id)
)
stat["authors"] = (
get_author_authors_stat(entity.id)
if is_author
else get_topic_authors_stat(entity.id)
)
stat["followers"] = (
get_author_followers_stat(entity.id)
if is_author
else get_topic_followers_stat(entity.id)
)
if is_author:
stat["comments"] = get_author_comments_stat(entity.id)
entity.stat = stat
records.append(entity)
except Exception as exc:
import traceback