First steps with the new registration app

new-registration-app/main.py

@@ -0,0 +1,49 @@
+from contextlib import asynccontextmanager
+from typing import Union, Annotated
+from models import  Event
+from fastapi import FastAPI, Request, Depends
+from fastapi.templating import Jinja2Templates
+from fastapi.staticfiles import StaticFiles
+from sqlmodel import Field, Session, SQLModel, create_engine, select
+
+sqlite_file_name = "database.db"
+sqlite_url = f"sqlite:///{sqlite_file_name}"
+
+connect_args = {"check_same_thread": False}
+engine = create_engine(sqlite_url, connect_args=connect_args)
+
+def get_session():
+    with Session(engine) as session:
+        yield session
+
+def create_db_and_tables():
+    SQLModel.metadata.create_all(engine)
+
+@asynccontextmanager
+async def on_startup(app_: FastAPI):
+    create_db_and_tables()
+    yield
+
+app = FastAPI(lifespan=on_startup)
+app.mount("/static", StaticFiles(directory="static"), name="static")
+
+templates = Jinja2Templates(directory="templates")
+
+
+SessionDep = Annotated[Session, Depends(get_session)]
+
+@app.get("/")
+async def read_root(request: Request, session: SessionDep):
+    statement = select(Event).order_by(Event.event_time)
+    events = session.exec(statement).all()
+    return templates.TemplateResponse(
+        request=request, name="index.html", context={"events": events}
+    )
+
+@app.get("/event/{event_id}")
+async def read_event(request: Request, event_id: int, session: SessionDep):
+    statement = select(Event).where(Event.id == event_id)
+    event = session.exec(statement).one()
+    return templates.TemplateResponse(
+        request=request, name="event.html", context={"event": event}
+    )