feat: убираем денормализацию (антипреждевременная оптимизация)

2025-12-16 10:04:20 +03:00
parent 2339471956
commit 18b30eaf7f
26 changed files with 295 additions and 232 deletions
--- a/migrations/models/0_20251215212038_init.py
+++ b/migrations/models/0_20251215212038_init.py
@@ -1,3 +1,5 @@
+# ruff: noqa
+# mypy: ignore-errors
 from tortoise import BaseDBAsyncClient

 RUN_IN_TRANSACTION = True
@@ -244,74 +246,74 @@ async def downgrade(db: BaseDBAsyncClient) -> str:


 MODELS_STATE = (
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+    'FKRQ/pivzUZmgSTs5Bmvog+WUaE9IvMWJ31kDdjh3L6QMl+Y0dp7tz1D3rnh+fdr3w3F5K'
+    'muufG4E7WRZ4QXryypSNXqDKnkeTCn5O6NDIAaJTfDsBPDo8zAAgKZV89TbNY9x3xLof95'
+    '37jnCt9x2t7SO8Gzcb/f4/gXYk2A=='
 )
--- a/migrations/models/1_20251215220358_update.py
+++ b/migrations/models/1_20251215220358_update.py
@@ -1,90 +0,0 @@
-from tortoise import BaseDBAsyncClient
-
-RUN_IN_TRANSACTION = True
-
-
-async def upgrade(db: BaseDBAsyncClient) -> str:
-    return """
-        COMMENT ON COLUMN "placement"."status" IS 'ACTIVE: active
-ARCHIVED: archived';"""
-
-
-async def downgrade(db: BaseDBAsyncClient) -> str:
-    return """
-        COMMENT ON COLUMN "placement"."status" IS 'PENDING: pending
-ACTIVE: active
-DELETED: deleted
-ARCHIVED: archived';"""
-
-
-MODELS_STATE = (
-    "eJztXWtv2zgW/SuGP3WAbJE4zqPBYgHHUVNNHduwnXR2mkJQZMbRRpY8eiQNiv73JfWkJE"
-    "rRy5Zs3y9Fw5elc0mK5/Dy8ld7qc2RYnzsP4mqipT2RetXWxWXCP8nmnXQaourVZBBEkzx"
-    "QbHLSlShB8PURcnEyY+iYiCcNEeGpMsrU9ZUnKpaikISNQkXlNVFkGSp8j8WEkxtgcwnpO"
-    "OM7z9wsqzO0U9keH+unoVHGSnz0MPKc/Lbdrpgvq3stNtb/uqzXZL83IMgaYq1VIPSqzfz"
-    "SVP94pYlzz+SOiRvgVSkiyaaU69BntJ9YS/JeWKcYOoW8h91HiTM0aNoKQSM9r8fLVUiGL"
-    "TsXyL/dP/TzgGPpKkEWlk1CRa/fjtvFbyzndomP9X/0pt8OD79w35LzTAXup1pI9L+bVcU"
-    "TdGpauMaACnpiLy2IJpxQK9wjikvERvUcM0IuHO36kfvP0VA9hIClIMe5sHswVcM0zZ+h/"
-    "lIVd5cC6ZgPONvuOmsdzMmb7I0jH8UG6LejCM5HTv1LZL6wTGJhseHM278Rlrf+NmXFvmz"
-    "9fdoyEUN55eb/d0mzyRapiao2qsgzqnO5qV6wOCSgWGt1bygYcM1wbC1GtZ9+MCueC5Gxe"
-    "warlmBXd2n3aBZt8SM3munDlATm2Ohi0uB9S27lBe8arLtGKkYMSSGaj0ftJIDckF+5V+f"
-    "Op3j47PO4fHp+Un37Ozk/PAcl7UfKZ51lmLuS/6aH87C1iMJv8MYy6aC4ujiNY6egK1XIY"
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-    "GKUKrHZ4oLkIQHUXp+FfW5EMqhQFVECS2RysL20q37+esEKaL9SnFEXXI59tpp5mT62+se"
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-    "+oYWETfle3bKnPXsyQiYJ2uNLmdOySo7FiKRuCQFS7T+vNDI+6tvQpefEJhtEMzDZ1O4gU"
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-    "ZET8o1iv4Tnpx96iiBbVOc2gRXWiYz/QokhW1H9HZV/b8ud0NEzy31ETbm65VbFdv89lyT"
-    "xoKbJh/libFhgsQR8sWcHAGh/Jz65pFUqwCE2+MSefqD9PZFYlDVyyqHs9vMlmpQy65LHV"
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-    "3U278ZJ4RL2gtxURe3PY9hMrCYgflYO3W9tiTKjIHAAMGxiyYKgKluq8BDYGyjrlqSC6DU"
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-    "K/D0R+C4/7r5A6J+aJGbA95oZX/PD6ouUWuVd7/T43tuNNipKEVqYTsvJu9NWJWPmiPRc7"
-    "+1/xHRTOGmcuPLzlPOocq7gnR52jXj05YaOq7CFgcHVHVcfq4eqOg9JXdwRTWAUgbv2x+t"
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-    "SU8m9B+lI2jPKnckI0c+y32sxVYjbXH/8lBEPSVpV5vIQBmpKmtwyljekZVD96T9kId7ms"
-    "GoewCldbm9xBLyCCnwTZA2QPYMcge4BhQfbYddkj/KUtIn2EW6g7hmDv6oYfCp9vB4OLlj"
-    "hfyqrwiMv5MfmmwoTrXflx+AyBjFAq99uEn3FU9qsum1T8P6+6fzrDrR/kuw0EBdwWxoNe"
-    "n7vhhsET+McavGcISnhPERRxW+kNe4P/zvi+1wherilvpix5bQT5pOeMbmdCf8D3v07pkq"
-    "8ytpBlCpIiS8/kelYnWKL/ak6ERP/NvFzvxbxs+4mKyEadbpZjNd3kUzXdqHLEXM/lV0P2"
-    "T03KIokIFRH7NfjQ166NbMPmc5TTZmdsPgcuQNscbl4HecN/2b/t9D//L9jNBloHq3+gdW"
-    "BYoHVA64DWAa1rPK0LL+MKeWWEWqi7D7u90e+GQf8KOhbVX6iO4tvLN1QRC33KYKBPifb5"
-    "xDZPzkv6qDrr5dgb/DgUctkApQKUClAqekiXpac2Q5Nwcw7S1AcxKNOYkH6JEbuzBup27V"
-    "hOHyjJb5w43Z2j7ln3/Pi064fn9lPSXP+8CNzJssAL0pNXpmz0qCp7Hk2K/pyQoZEDRLf4"
-    "dgJ4dHiYAUBcKvnqbZLHuO+IdT/uO/cdqbXed7S2j/Bu3Gz0+/9WjBjY"
-)
--- a/migrations/models/1_20251216100730_update.py
+++ b/migrations/models/1_20251216100730_update.py
@@ -0,0 +1,98 @@
+# ruff: noqa
+# mypy: ignore-errors
+from tortoise import BaseDBAsyncClient
+
+RUN_IN_TRANSACTION = True
+
+
+async def upgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        ALTER TABLE "creative" DROP COLUMN "placements_count";
+        ALTER TABLE "placement" DROP COLUMN "subscriptions_count";
+        COMMENT ON COLUMN "placement"."status" IS 'ACTIVE: active
+ARCHIVED: archived';
+        CREATE UNIQUE INDEX IF NOT EXISTS "uid_subscriptio_placeme_8fcb8f" ON "subscription" ("placement_id", "subscriber_id");"""
+
+
+async def downgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        DROP INDEX IF EXISTS "uid_subscriptio_placeme_8fcb8f";
+        ALTER TABLE "creative" ADD "placements_count" INT NOT NULL DEFAULT 0;
+        ALTER TABLE "placement" ADD "subscriptions_count" INT NOT NULL DEFAULT 0;
+        COMMENT ON COLUMN "placement"."status" IS 'PENDING: pending
+ACTIVE: active
+DELETED: deleted
+ARCHIVED: archived';"""
+
+
+MODELS_STATE = (
+    'eJztXWtv2zgW/SuGP3WAbJE4zqPBYgHHUVNNHduwnXR2mkJQZMbRRpY8eiQNiv73JfWkJE'
+    'rRy5Zs3y9Fw5elc0mK5/Dy8ld7qc2RYnzsP4mqipT2RetXWxWXCP8nmnXQaourVZBBEkzx'
+    'QbHLSlShB8PURcnEyY+iYiCcNEeGpMsrU9ZUnKpaikISNQkXlNVFkGSp8j8WEkxtgcwnpO'
+    'OM7z9wsqzO0U9keH+unoVHGSnz0MPKc/Lbdrpgvq3stNtb/uqzXZL83IMgaYq1VIPSqzfz'
+    'SVP94pYlzz+SOiRvgVSkiyaaU69BntJ9YS/JeWKcYOoW8h91HiTM0aNoKQSM9r8fLVUiGL'
+    'TsXyL/dP/TzgGPpKkEWlk1CRa/fjtvFbyzndomP9X/0pt8OD79w35LzTAXup1pI9L+bVcU'
+    'TdGpauMaACnpiLy2IJpxQK9wjikvERvUcM0IuHO36kfvP0VA9hIClIMe5sHswVcM0zZ+h/'
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+    '+a/mysRAnlBC5ab0+gi6lVDCTjMH7WdCQv1K/oLTbs2az7G91WU+GLUW2crIuvPsWM9RH8'
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+    'oVqFWJAzQvWS3FU+sYgg0iqhBUH4LqM7Bw3AfKIlFlOMR6cIDLBaKQADUHal4bNXe7SxpB'
+    'D3pUBpruCk3Vs/X4paKke0D4BCDywPeAyINhgcjvA5HfwuP+K6TOiXliBmyPueEVP7y+aL'
+    'lF7tVev8+N7YCUoiShlenEtLwbfXVCWr5oz8XO/ld8SYWzxpkLD285jzrHKu7JUeeoV09O'
+    '2KgqewgY3O1R1bF6uNvjoPTdHsEUVgGIW3+sPjahvw+gd/Ri36GjJvUmxSIIK0Zpusj7p2'
+    'zCUhZoIqCJgCbSKM4FmsjeGBY0EdBEGqOJZA6ByA/veFsPcRea9+rlYNS35ZAHRZMKyiFp'
+    'R3M8OeQsUQ45i8VBBEYPjB4YfTNoVX5GD4S0NCGl/FuQvpQNo/ypnBDNHPutNnOVmM31x3'
+    '8JwZC0VWUeL2GApqTpLUNpY3oG1Y/eUzbCXS6rxiGswtXWJnfQC4jgJ0H2ANkD2DHIHmBY'
+    'kD12XfYIf2mLSB/hFuqOIdi7uuGHwufbweCiJc6Xsio84nJ+TL6pMOF6V34cPkMgI5TK/T'
+    'bhZxyV/arLJhX/z6vun85w6wf5bgNBAbeF8aDX5264YfAE/rEG7xmCEt5TBEXcVnrD3uC/'
+    'M77vNYKXa8qbKUteG0E+6Tmj25nQH/D9r1O65KuMLWSZgqTI0jO5v9UJlui/mhMh0X8zL9'
+    'd7MS/bfqIislGnm+VYTTf5VE03qhwx13P51ZD9U5OySCJCRcR+DT70tWsj27D5HOW02Rmb'
+    'z4EL0DaHm9dB3vBf9m87/c//C3azgdbB6h9oHRgWaB3QOqB1QOsaT+vCy7hCXhmhFuruw2'
+    '5v9Lth0L+CjkX1F6qj+PbyDVXEQp8yGOhTon0+sc2T85I+qs56OfYGPw6FXDZAqQClApSK'
+    'HtJl6anN0CTcnIM09UEMyjQmpF9ixO6sgbpdO5bTB0ryGydOd+eoe9Y9Pz7t+uG5/ZQ01z'
+    '8vAneyLPCC9OSVKRs9qsqeR5OiPydkaOQA0S2+nQAeHR5mABCXSr56m+Qx7jti3Y/7zn1H'
+    'aq33Ha3tI7wbNxv9/j9vKFN0'
+)
--- a/src/adapter/postgres.py
+++ b/src/adapter/postgres.py
@@ -497,3 +497,45 @@ class Postgres(DatabaseBase):

    async def clear_telegram_state(self, telegram_id: int) -> None:
        await domain.TelegramState.filter(telegram_id=telegram_id).delete()
+
+    # Count methods
+    async def count_placements_by_creative(self, creative_id: uuid.UUID) -> int:
+        return await domain.Placement.filter(creative_id=creative_id).count()
+
+    async def count_subscriptions_by_placement(self, placement_id: uuid.UUID) -> int:
+        return await domain.Subscription.filter(placement_id=placement_id).count()
+
+    async def count_placements_by_creative_batch(self, creative_ids: list[uuid.UUID]) -> dict[uuid.UUID, int]:
+        if not creative_ids:
+            return {}
+
+        from tortoise.functions import Count
+
+        results = (
+            await domain.Placement.filter(creative_id__in=creative_ids)
+            .group_by('creative_id')
+            .annotate(count=Count('id'))
+            .values('creative_id', 'count')
+        )
+
+        counts = {row['creative_id']: row['count'] for row in results}
+        return {cid: counts.get(cid, 0) for cid in creative_ids}
+
+    async def count_subscriptions_by_placement_batch(self, placement_ids: list[uuid.UUID]) -> dict[uuid.UUID, int]:
+        if not placement_ids:
+            return {}
+
+        from tortoise.functions import Count
+
+        results = (
+            await domain.Subscription.filter(placement_id__in=placement_ids)
+            .group_by('placement_id')
+            .annotate(count=Count('id'))
+            .values('placement_id', 'count')
+        )
+
+        counts = {row['placement_id']: row['count'] for row in results}
+        return {pid: counts.get(pid, 0) for pid in placement_ids}
+
+    async def has_placements_for_creative(self, creative_id: uuid.UUID) -> bool:
+        return await domain.Placement.filter(creative_id=creative_id).exists()
--- a/src/domain/creative.py
+++ b/src/domain/creative.py
@@ -20,7 +20,6 @@ class Creative(TimestampedModel):
    name = fields.CharField(max_length=255)
    text = fields.TextField()
    status = fields.CharEnumField(CreativeStatus, default=CreativeStatus.ACTIVE)
-    placements_count = fields.IntField(default=0)

    workspace: fields.ForeignKeyRelation['Workspace'] = fields.ForeignKeyField(
        'models.Workspace', related_name='creatives', on_delete=fields.CASCADE, index=True
--- a/src/domain/placement.py
+++ b/src/domain/placement.py
@@ -39,7 +39,6 @@ class Placement(TimestampedModel):
    invite_link = fields.CharField(max_length=512)

    status = fields.CharEnumField(PlacementStatus, default=PlacementStatus.ACTIVE)
-    subscriptions_count = fields.IntField(default=0)

    project: fields.ForeignKeyRelation['Project'] = fields.ForeignKeyField(
        'models.Project', related_name='placements', on_delete=fields.CASCADE, index=True
--- a/src/domain/subscription.py
+++ b/src/domain/subscription.py
@@ -34,3 +34,4 @@ class Subscription(TimestampedModel):

    class Meta:
        table = 'subscription'
+        unique_together = (('placement_id', 'subscriber_id'),)
--- a/src/usecase/init.py
+++ b/src/usecase/init.py
@@ -230,6 +230,17 @@ class Database(typing.Protocol):
        self, subscriber_id: UUID, project_id: UUID
    ) -> domain.Subscription | None: ...

+    # Count methods
+    async def count_placements_by_creative(self, creative_id: UUID) -> int: ...
+
+    async def count_subscriptions_by_placement(self, placement_id: UUID) -> int: ...
+
+    async def count_placements_by_creative_batch(self, creative_ids: list[UUID]) -> dict[UUID, int]: ...
+
+    async def count_subscriptions_by_placement_batch(self, placement_ids: list[UUID]) -> dict[UUID, int]: ...
+
+    async def has_placements_for_creative(self, creative_id: UUID) -> bool: ...
+
    # Post methods
    async def create_post(self, post: domain.Post) -> None: ...

--- a/src/usecase/analytics/get_channel_analytics.py
+++ b/src/usecase/analytics/get_channel_analytics.py
@@ -65,13 +65,17 @@ async def get_channel_analytics(
    post_ids = [p.post.id for p in placements if p.post]
    views_map = await self.database.get_latest_views_data_batch(post_ids) if post_ids else {}

+    # Batch fetch subscriptions counts
+    placement_ids = [p.id for p in placements]
+    subscriptions_counts = await self.database.count_subscriptions_by_placement_batch(placement_ids)
+
    for p in placements:
        stats = channel_stats.get(p.placement_channel_id)
        if stats is None:
            continue

        stats.total_cost += p.cost if p.cost is not None else 0
-        stats.total_subscriptions += p.subscriptions_count
+        stats.total_subscriptions += subscriptions_counts.get(p.id, 0)

        # Get views from batch data
        if p.post and p.post.id in views_map:
--- a/src/usecase/analytics/get_creatives_analytics.py
+++ b/src/usecase/analytics/get_creatives_analytics.py
@@ -53,13 +53,17 @@ async def get_creatives_analytics(
    post_ids = [p.post.id for p in placements if p.post]
    views_map = await self.database.get_latest_views_data_batch(post_ids) if post_ids else {}

+    # Batch fetch subscriptions counts
+    placement_ids = [p.id for p in placements]
+    subscriptions_counts = await self.database.count_subscriptions_by_placement_batch(placement_ids)
+
    for p in placements:
        stats = creative_stats.get(p.creative_id)
        if stats is None:
            continue

        stats.total_cost += p.cost if p.cost is not None else 0
-        stats.total_subscriptions += p.subscriptions_count
+        stats.total_subscriptions += subscriptions_counts.get(p.id, 0)

        # Get views from batch data
        if p.post and p.post.id in views_map:
--- a/src/usecase/analytics/get_placements_analytics.py
+++ b/src/usecase/analytics/get_placements_analytics.py
@@ -48,6 +48,10 @@ async def get_placements_analytics(
    post_ids = [p.post.id for p in placements if p.post]
    views_map = await self.database.get_latest_views_data_batch(post_ids) if post_ids else {}

+    # Batch fetch subscriptions counts
+    placement_ids = [p.id for p in placements]
+    subscriptions_counts = await self.database.count_subscriptions_by_placement_batch(placement_ids)
+
    return [
        dto.PlacementAnalyticsOutput(
            id=p.id,
@@ -59,9 +63,9 @@ async def get_placements_analytics(
            creative_name=p.creative.name,
            placement_date=p.placement_date,
            cost=p.cost,
-            subscriptions_count=p.subscriptions_count,
+            subscriptions_count=subscriptions_counts.get(p.id, 0),
            views_count=views_map[p.post.id][0] if p.post and p.post.id in views_map else None,
-            cpf=_calculate_cpf(p.cost, p.subscriptions_count),
+            cpf=_calculate_cpf(p.cost, subscriptions_counts.get(p.id, 0)),
            cpm=_calculate_cpm(p.cost, views_map[p.post.id][0] if p.post and p.post.id in views_map else None),
        )
        for p in placements
--- a/src/usecase/analytics/get_spending_analytics.py
+++ b/src/usecase/analytics/get_spending_analytics.py
@@ -74,6 +74,10 @@ async def get_spending_analytics(
    post_ids = [p.post.id for p in filtered if p.post]
    views_map = await self.database.get_latest_views_data_batch(post_ids) if post_ids else {}

+    # Batch fetch subscriptions counts
+    placement_ids = [p.id for p in filtered]
+    subscriptions_counts = await self.database.count_subscriptions_by_placement_batch(placement_ids)
+
    # Группировка по периодам
    period_data: dict[str, PeriodData] = defaultdict(PeriodData)

@@ -85,8 +89,9 @@ async def get_spending_analytics(
            total_cost += p.cost
            pd.cost += p.cost

-        total_subs += p.subscriptions_count
-        pd.subscriptions += p.subscriptions_count
+        subs_count = subscriptions_counts.get(p.id, 0)
+        total_subs += subs_count
+        pd.subscriptions += subs_count

        # Get views from batch data
        if p.post and p.post.id in views_map:
--- a/src/usecase/creative/create_creative.py
+++ b/src/usecase/creative/create_creative.py
@@ -42,5 +42,5 @@ async def create_creative(
        project_channel_title=project.channel.title,
        created_at=creative.created_at,
        status=creative.status,
-        placements_count=creative.placements_count,
+        placements_count=0,
    )
--- a/src/usecase/creative/delete_creative.py
+++ b/src/usecase/creative/delete_creative.py
@@ -21,7 +21,8 @@ async def delete_creative(self: 'Usecase', input: dto.DeleteCreativeInput) -> No

    context.ensure_project_permission(domain.PermissionKey.PROJECTS_WRITE, creative.project_id)

-    if creative.placements_count > 0:
+    has_placements = await self.database.has_placements_for_creative(creative.id)
+    if has_placements:
        log.warning('Creative %s is used in placements and cannot be deleted', input.creative_id)
        raise domain.CreativeInUse(input.creative_id)

--- a/src/usecase/creative/get_creative.py
+++ b/src/usecase/creative/get_creative.py
@@ -20,6 +20,8 @@ async def get_creative(self: 'Usecase', input: dto.GetCreativeInput) -> dto.Crea

    context.ensure_project_permission(domain.PermissionKey.PROJECTS_READ, creative.project_id)

+    placements_count = await self.database.count_placements_by_creative(creative.id)
+
    return dto.CreativeOutput(
        id=creative.id,
        name=creative.name,
@@ -28,5 +30,5 @@ async def get_creative(self: 'Usecase', input: dto.GetCreativeInput) -> dto.Crea
        project_channel_title=creative.project.channel.title,
        created_at=creative.created_at,
        status=creative.status,
-        placements_count=creative.placements_count,
+        placements_count=placements_count,
    )
--- a/src/usecase/creative/get_creatives.py
+++ b/src/usecase/creative/get_creatives.py
@@ -24,6 +24,9 @@ async def get_creatives(self: 'Usecase', input: dto.GetCreativesInput) -> list[d
        allowed_project_ids=allowed_project_ids,
    )

+    creative_ids = [c.id for c in creatives]
+    placements_counts = await self.database.count_placements_by_creative_batch(creative_ids)
+
    return [
        dto.CreativeOutput(
            id=creative.id,
@@ -33,7 +36,7 @@ async def get_creatives(self: 'Usecase', input: dto.GetCreativesInput) -> list[d
            project_channel_title=creative.project.channel.title,
            created_at=creative.created_at,
            status=creative.status,
-            placements_count=creative.placements_count,
+            placements_count=placements_counts.get(creative.id, 0),
        )
        for creative in creatives
    ]
--- a/src/usecase/creative/update_creative.py
+++ b/src/usecase/creative/update_creative.py
@@ -35,6 +35,8 @@ async def update_creative(

    await self.database.update_creative(creative)

+    placements_count = await self.database.count_placements_by_creative(creative.id)
+
    return dto.CreativeOutput(
        id=creative.id,
        name=creative.name,
@@ -43,5 +45,5 @@ async def update_creative(
        project_channel_title=creative.project.channel.title,
        created_at=creative.created_at,
        status=creative.status,
-        placements_count=creative.placements_count,
+        placements_count=placements_count,
    )
--- a/src/usecase/placement/create_placement.py
+++ b/src/usecase/placement/create_placement.py
@@ -39,8 +39,6 @@ async def create_placement(
    if project.channel.telegram_id is None:
        raise domain.ChannelNotFound(project.channel.id)

-    print(f'Телега id: {project.channel.telegram_id}')
-
    invite_link = await self.telegram_bot.create_chat_invite_link(project.channel.telegram_id, requires_approval)

    placement = domain.Placement(
@@ -56,12 +54,8 @@ async def create_placement(
        status=domain.PlacementStatus.ACTIVE,
    )

-    async with self.database.transaction():
    await self.database.create_placement(placement)

-        creative.placements_count += 1
-        await self.database.update_creative(creative)
-
    return dto.PlacementOutput(
        id=placement.id,
        project_id=placement.project_id,
@@ -77,6 +71,6 @@ async def create_placement(
        invite_link_type=placement.invite_link_type,
        invite_link=placement.invite_link,
        status=placement.status,
-        subscriptions_count=placement.subscriptions_count,
+        subscriptions_count=0,
        created_at=placement.created_at,
    )
--- a/src/usecase/placement/delete_placement.py
+++ b/src/usecase/placement/delete_placement.py
@@ -21,14 +21,4 @@ async def delete_placement(self: 'Usecase', input: dto.DeletePlacementInput) ->

    context.ensure_project_permission(domain.PermissionKey.PLACEMENTS_WRITE, placement.project_id)

-    if placement.status != domain.PlacementStatus.ACTIVE:
-        await self.database.delete_placement(input.placement_id)
-        return
-
-    async with self.database.transaction():
-        creative = await self.database.get_creative(input.workspace_id, placement.creative_id)
-        if creative and creative.placements_count > 0:
-            creative.placements_count -= 1
-            await self.database.update_creative(creative)
-
    await self.database.delete_placement(input.placement_id)
--- a/src/usecase/placement/fetch_placement_post_cycle.py
+++ b/src/usecase/placement/fetch_placement_post_cycle.py
@@ -12,7 +12,6 @@ log = logging.getLogger(__name__)
 async def fetch_placement_post_cycle(self: 'Usecase', interval_seconds: int) -> None:
    log.debug('Starting fetch_placement_post_cycle')

-    # Получаем все placement без привязанного поста
    placements_without_post = (
        await domain.Placement.filter(
            post_id__isnull=True,
--- a/src/usecase/placement/get_placement.py
+++ b/src/usecase/placement/get_placement.py
@@ -25,18 +25,11 @@ async def get_placement(self: 'Usecase', input: dto.GetPlacementInput) -> dto.Pl

    # Compute post-related fields
    ad_post_url = None
-    views_count = None
-    views_availability = domain.PostViewsAvailability.UNKNOWN
-    last_views_fetch_at = None

    if placement.post:
        ad_post_url = generate_post_url(placement.post.channel.username, placement.post.message_id)

-        # Get latest views data
-        views_data = await self.database.get_latest_views_data(placement.post.id)
-        if views_data:
-            views_count, last_views_fetch_at = views_data
-            views_availability = domain.PostViewsAvailability.AVAILABLE
+    subscriptions_count = await self.database.count_subscriptions_by_placement(placement.id)

    return dto.PlacementOutput(
        id=placement.id,
@@ -53,6 +46,6 @@ async def get_placement(self: 'Usecase', input: dto.GetPlacementInput) -> dto.Pl
        invite_link_type=placement.invite_link_type,
        invite_link=placement.invite_link,
        status=placement.status,
-        subscriptions_count=placement.subscriptions_count,
+        subscriptions_count=subscriptions_count,
        created_at=placement.created_at,
    )
--- a/src/usecase/placement/get_placements.py
+++ b/src/usecase/placement/get_placements.py
@@ -28,6 +28,9 @@ async def get_placements(self: 'Usecase', input: dto.GetPlacementsInput) -> list
        allowed_project_ids=allowed_project_ids,
    )

+    placement_ids = [p.id for p in placements]
+    subscriptions_counts = await self.database.count_subscriptions_by_placement_batch(placement_ids)
+
    placement_outputs = []
    for placement in placements:
        ad_post_url = None
@@ -51,7 +54,7 @@ async def get_placements(self: 'Usecase', input: dto.GetPlacementsInput) -> list
                invite_link_type=placement.invite_link_type,
                invite_link=placement.invite_link,
                status=placement.status,
-                subscriptions_count=placement.subscriptions_count,
+                subscriptions_count=subscriptions_counts.get(placement.id, 0),
                created_at=placement.created_at,
            )
        )
--- a/src/usecase/placement/update_placement.py
+++ b/src/usecase/placement/update_placement.py
@@ -44,6 +44,8 @@ async def update_placement(
    if placement.post:
        ad_post_url = generate_post_url(placement.post.channel.username, placement.post.message_id)

+    subscriptions_count = await self.database.count_subscriptions_by_placement(placement.id)
+
    return dto.PlacementOutput(
        id=placement.id,
        project_id=placement.project_id,
@@ -59,6 +61,6 @@ async def update_placement(
        invite_link_type=placement.invite_link_type,
        invite_link=placement.invite_link,
        status=placement.status,
-        subscriptions_count=placement.subscriptions_count,
+        subscriptions_count=subscriptions_count,
        created_at=placement.created_at,
    )
--- a/src/usecase/project/tg_add_project_1.py
+++ b/src/usecase/project/tg_add_project_1.py
@@ -73,9 +73,18 @@ async def tg_add_project_1(self: 'Usecase', input: dto.ConnectProjectInput) -> d
        channel = await self.database.get_channel(telegram_id=input.telegram_id)
        if channel:
            channel.title = input.title
+            if input.username is not None:
                channel.username = input.username
            await self.database.update_channel(channel)
        else:
+            if input.username is None:
+                log.warning('Cannot create channel %s without username', input.telegram_id)
+                await self.telegram_bot.send_message(
+                    f'⚠️ Канал "{input.title}" не может быть подключен.\n\nУ канала отсутствует публичный username.',
+                    input.user_telegram_id,
+                )
+                return None
+
            channel = domain.Channel(
                telegram_id=input.telegram_id,
                title=input.title,
--- a/src/usecase/subscription/handle_subscription.py
+++ b/src/usecase/subscription/handle_subscription.py
@@ -60,14 +60,10 @@ async def handle_subscription(
    existing_sub = await self.database.get_subscription_by_subscriber_and_placement(subscriber.id, placement.id)

    if existing_sub and existing_sub.status == domain.SubscriptionStatus.UNSUBSCRIBED:
-        async with self.database.transaction():
        existing_sub.status = domain.SubscriptionStatus.ACTIVE
        existing_sub.unsubscribed_at = None
        await self.database.update_subscription(existing_sub)

-            placement.subscriptions_count += 1
-            await self.database.update_placement(placement)
-
        log.info(
            'Subscription reactivated: subscriber %s (telegram_id: %s) resubscribed via same placement %s',
            subscriber.id,
@@ -81,12 +77,8 @@ async def handle_subscription(
        subscriber_id=subscriber.id,
        invite_link=invite_link,
    )
-    async with self.database.transaction():
    await self.database.create_subscription(subscription)

-        placement.subscriptions_count += 1
-        await self.database.update_placement(placement)
-
    log.info(
        'Subscription created: subscriber %s (telegram_id: %s) subscribed via placement %s (invite_link: %s)',
        subscriber.id,
--- a/src/usecase/subscription/handle_unsubscription.py
+++ b/src/usecase/subscription/handle_unsubscription.py
@@ -34,19 +34,13 @@ async def handle_unsubscription(self: 'Usecase', user_telegram_id: int, channel_
        return

    for subscription in subscriptions:
-        async with self.database.transaction():
        subscription.status = domain.SubscriptionStatus.UNSUBSCRIBED
        subscription.unsubscribed_at = timezone.now()
        await self.database.update_subscription(subscription)

-            placement = subscription.placement
-            if placement.subscriptions_count > 0:
-                placement.subscriptions_count -= 1
-                await self.database.update_placement(placement)
-
        log.info(
            'Subscription marked as unsubscribed: subscriber %s (telegram_id: %s) unsubscribed from placement %s',
            subscriber.id,
            user_telegram_id,
-        placement.id,
+            subscription.placement_id,
        )