precache-topic-followers-debug

cache/precache.py

@@ -1,7 +1,7 @@
 import asyncio
 import traceback
 
-from sqlalchemy import and_, join, select
+from sqlalchemy import and_, func, join, select
 
 # Импорт Author, AuthorFollower отложен для избежания циклических импортов
 from cache.cache import cache_author, cache_topic
@@ -69,29 +69,43 @@ async def precache_topics_authors(topic_id: int, session) -> None:
 
 # Предварительное кеширование подписчиков тем
 async def precache_topics_followers(topic_id: int, session) -> None:
-    followers_query = select(TopicFollower.follower).where(TopicFollower.topic == topic_id)
-    topic_followers = {row[0] for row in session.execute(followers_query) if row[0]}
+    try:
+        followers_query = select(TopicFollower.follower).where(TopicFollower.topic == topic_id)
+        topic_followers = {row[0] for row in session.execute(followers_query) if row[0]}
 
-    followers_payload = fast_json_dumps(list(topic_followers))
-    await redis.execute("SET", f"topic:followers:{topic_id}", followers_payload)
+        followers_payload = fast_json_dumps(list(topic_followers))
+        await redis.execute("SET", f"topic:followers:{topic_id}", followers_payload)
+
+        # Добавляем логирование для отладки
+        logger.debug(f"Precached {len(topic_followers)} followers for topic #{topic_id}")
+        if len(topic_followers) == 0:
+            logger.warning(f"⚠️ Topic #{topic_id} has 0 followers - this might indicate a data issue")
+        elif len(topic_followers) == 1:
+            logger.info(f"ℹ️ Topic #{topic_id} has exactly 1 follower - checking if this is correct")
+
+    except Exception as e:
+        logger.error(f"Error precaching followers for topic #{topic_id}: {e}")
+        # В случае ошибки, устанавливаем пустой список
+        await redis.execute("SET", f"topic:followers:{topic_id}", fast_json_dumps([]))
 
 
 async def precache_data() -> None:
     logger.info("precaching...")
     logger.debug("Entering precache_data")
+
+    # Список паттернов ключей, которые нужно сохранить при FLUSHDB
+    preserve_patterns = [
+        "migrated_views_*",  # Данные миграции просмотров
+        "session:*",  # Сессии пользователей
+        "env_vars:*",  # Переменные окружения
+        "oauth_*",  # OAuth токены
+    ]
+
+    # Сохраняем все важные ключи перед очисткой
+    all_keys_to_preserve = []
+    preserved_data = {}
+
     try:
-        # Список паттернов ключей, которые нужно сохранить при FLUSHDB
-        preserve_patterns = [
-            "migrated_views_*",  # Данные миграции просмотров
-            "session:*",  # Сессии пользователей
-            "env_vars:*",  # Переменные окружения
-            "oauth_*",  # OAuth токены
-        ]
-
-        # Сохраняем все важные ключи перед очисткой
-        all_keys_to_preserve = []
-        preserved_data = {}
-
         for pattern in preserve_patterns:
             keys = await redis.execute("KEYS", pattern)
             if keys:
@@ -153,6 +167,25 @@ async def precache_data() -> None:
 
         logger.info("Beginning topic precache phase")
         with local_session() as session:
+            # Проверяем состояние таблицы topic_followers перед кешированием
+            total_followers = session.execute(select(func.count(TopicFollower.topic))).scalar()
+            unique_topics_with_followers = session.execute(
+                select(func.count(func.distinct(TopicFollower.topic)))
+            ).scalar()
+            unique_followers = session.execute(select(func.count(func.distinct(TopicFollower.follower)))).scalar()
+
+            logger.info("📊 Database state before precaching:")
+            logger.info(f"   Total topic_followers records: {total_followers}")
+            logger.info(f"   Unique topics with followers: {unique_topics_with_followers}")
+            logger.info(f"   Unique followers: {unique_followers}")
+
+            if total_followers == 0:
+                logger.warning(
+                    "🚨 WARNING: topic_followers table is empty! This will cause all topics to show 0 followers."
+                )
+            elif unique_topics_with_followers == 0:
+                logger.warning("🚨 WARNING: No topics have followers! This will cause all topics to show 0 followers.")
+
             # topics
             q = select(Topic).where(Topic.community == 1)
             topics = get_with_stat(q)