feature: Füge dotEnv configuration hinzu

api/main.py

@@ -1,28 +1,35 @@
 import datetime
 
 from fastapi import FastAPI
+from sqlalchemy.exc import IntegrityError
 from sqlmodel import Session, SQLModel, create_engine, select
 from contextlib import asynccontextmanager
-
 from api.models import Car, FuelItem
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
-sqlite_file_name = "database.db"
-sqlite_url = f"sqlite:///{sqlite_file_name}"
+
+class Settings(BaseSettings):
+    database_url: str = ""
+    sqlite_file_name: str = ""
+
+    model_config = SettingsConfigDict(env_file=".env")
+
+
+settings = Settings()
+
+database_url = settings.database_url
 
 connect_args = {
         "check_same_thread": False
         }
-engine = create_engine(sqlite_url, echo=True, connect_args=connect_args)
+engine = create_engine(database_url, echo=True, connect_args=connect_args)
 
 
 def create_db_and_tables():
     SQLModel.metadata.create_all(engine)
 
 
-@asynccontextmanager
-async def lifespan(app: FastAPI):
-    # startup
-    create_db_and_tables()
+def fill_database():
     car = Car(id_string="Auto 1")
     with Session(engine) as session:
         session.add(car)
@@ -37,6 +44,16 @@ async def lifespan(app: FastAPI):
         session.add(fill_item)
         session.commit()
         session.refresh(fill_item)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # startup
+    create_db_and_tables()
+    try:
+        fill_database()
+    except IntegrityError as e:
+        print(e)
     yield