feat: Настройки БД & async клиент

src/fastapi_app/lib/app/settings.py

@@ -8,7 +8,7 @@ import lib.app.split_settings as app_split_settings
 
 class Settings(pydantic_settings.BaseSettings):
     api: app_split_settings.ApiSettings = pydantic.Field(default_factory=lambda: app_split_settings.ApiSettings())
-    postgres: app_split_settings.PostgresSettings = pydantic.Field(
+    db: app_split_settings.PostgresSettings = pydantic.Field(
         default_factory=lambda: app_split_settings.PostgresSettings()
     )
     logger: app_split_settings.LoggingSettings = pydantic.Field(

src/fastapi_app/lib/app/split_settings/__init__.py

@@ -1,12 +1,15 @@
 from .api import *
 from .logger import *
 from .postgres import *
+from .postgres import DBSettings, PostgresSettings
 from .project import *
 
 __all__ = [
     "ApiSettings",
+    "DBSettings",
     "LoggingSettings",
-    "get_logging_config",
+    "PostgresSettings",
     "PostgresSettings",
     "ProjectSettings",
+    "get_logging_config",
 ]

src/fastapi_app/lib/app/split_settings/postgres.py

@@ -4,7 +4,23 @@ import pydantic_settings
 import lib.app.split_settings.utils as app_split_settings_utils
 
 
-class PostgresSettings(pydantic_settings.BaseSettings):
+class DBSettings(pydantic_settings.BaseSettings):
+    """Abstract class for database settings."""
+
+    protocol: str
+    name: str
+    host: str
+    port: int
+    user: str
+    password: pydantic.SecretStr
+
+    @property
+    def dsn(self) -> str:
+        """Get database DSN."""
+        return f"{self.protocol}://{self.user}:{self.password}@{self.host}:{self.port}/{self.name}"
+
+
+class PostgresSettings(DBSettings):
     model_config = pydantic_settings.SettingsConfigDict(
         env_file=app_split_settings_utils.ENV_PATH,
         env_prefix="POSTGRES_",
@@ -12,6 +28,7 @@ class PostgresSettings(pydantic_settings.BaseSettings):
         extra="ignore",
     )
 
+    protocol: str = "postgresql+asyncpg"
     name: str = "database_name"
     host: str = "localhost"
     port: int = 5432

src/fastapi_app/lib/db/base.py

@@ -1,3 +1,7 @@
-# from libs.api.models.movies import *
-# from libs.api.models.notification_templates import *
-# from libs.api.models.users import *
+import sqlalchemy.orm
+
+
+class Base(sqlalchemy.orm.DeclarativeBase):
+    """Base Model Class for ORM Models and Alembic."""
+
+    pass

src/fastapi_app/lib/db/postgres.py

@@ -1,38 +1,31 @@
 import typing
 
-from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
-from sqlalchemy.orm import DeclarativeBase
+import sqlalchemy.ext.asyncio as sa_asyncio
 
 import lib.app.settings as app_settings
 
-settings = app_settings.settings
-
-# Создаём базовый класс для будущих моделей
+# settings = app_settings.settings
 
 
-class Base(DeclarativeBase):
-    pass
-
-
-# Создаём движок
-# Настройки подключения к БД передаём из переменных окружения, которые заранее загружены в файл настроек
 class AsyncDB:
-    def __init__(self):
-        self.database_dsn = (
-            f"postgresql+asyncpg://{settings.db.user}:{settings.db.password}"
-            f"@{settings.db.host}:{settings.db.port}/{settings.db.name}"
+    """Async DB connection."""
+
+    def __init__(self, settings: app_settings.Settings):
+        self.database_dsn = settings.db.dsn
+        self.engine = sa_asyncio.create_async_engine(self.database_dsn, echo=settings.project.debug, future=True)
+        self.async_session = sa_asyncio.async_sessionmaker(
+            self.engine, class_=sa_asyncio.AsyncSession, expire_on_commit=False
         )
-        self.engine = create_async_engine(self.database_dsn, echo=settings.project.debug, future=True)
-        self.async_session = async_sessionmaker(self.engine, class_=AsyncSession, expire_on_commit=False)
 
 
-db = AsyncDB()
-
-
-async def get_session() -> typing.AsyncGenerator[AsyncSession, typing.Any]:
+async def get_session(settings: app_settings.Settings) -> typing.AsyncGenerator[sa_asyncio.AsyncSession, typing.Any]:
+    db = AsyncDB(settings)
     async with db.async_session() as session:
         try:
             yield session
         except Exception:
             await session.rollback()
             raise
+        finally:
+            await session.close()
+            await db.engine.dispose()