feat: primeira versão da produção

app/routes/export.py

@@ -0,0 +1,32 @@
+from fastapi import APIRouter
+from fastapi.responses import StreamingResponse
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+from models import Fatura
+from database import AsyncSessionLocal
+import pandas as pd
+from io import BytesIO
+
+router = APIRouter()
+
+@router.get("/export-excel")
+async def exportar_excel():
+    async with AsyncSessionLocal() as session:
+        result = await session.execute(select(Fatura))
+        faturas = result.scalars().all()
+
+        # Converte os objetos para lista de dicionários
+        data = [f.__dict__ for f in faturas]
+        for row in data:
+            row.pop('_sa_instance_state', None)  # remove campo interno do SQLAlchemy
+
+        df = pd.DataFrame(data)
+
+        # Converte para Excel em memória
+        buffer = BytesIO()
+        with pd.ExcelWriter(buffer, engine='xlsxwriter') as writer:
+            df.to_excel(writer, index=False, sheet_name='Faturas')
+
+        buffer.seek(0)
+        return StreamingResponse(buffer, media_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+                                 headers={"Content-Disposition": "attachment; filename=faturas.xlsx"})