commit inicial

app/database.py

@@ -0,0 +1,35 @@
+from sqlalchemy import create_engine, text
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
+from app.config import settings
+
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args={"check_same_thread": False},
+)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def apply_migrations():
+    """Aplica migraciones incrementales compatibles con SQLite."""
+    with engine.connect() as conn:
+        for sql in [
+            "ALTER TABLE playlists ADD COLUMN spotify_type VARCHAR NOT NULL DEFAULT 'playlist'",
+            "ALTER TABLE playlists ADD COLUMN emoji VARCHAR NOT NULL DEFAULT ''",
+        ]:
+            try:
+                conn.execute(text(sql))
+                conn.commit()
+            except Exception:
+                pass  # columna ya existe