More setup

.gitignore

@@ -172,3 +172,5 @@ cython_debug/
 
 # PyPI configuration file
 .pypirc
+
+venv

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "python.defaultInterpreterPath": ".venv/bin/python",
+}

Makefile

@@ -1,14 +1,14 @@
 # Variables
 APP_NAME=app/main.py
 VENV_DIR=venv
-REQ_FILE=requirements.txt
+REQ_FILE=backend/requirements.txt
 
 # Create virtual environment
 venv:
 	python3 -m venv $(VENV_DIR)
 
 # Install dependencies
-install: venv
+install:
 	$(VENV_DIR)/bin/pip install -r $(REQ_FILE)
 
 # Run the application

backend/app/dtos/predictions.py

@@ -1,27 +0,0 @@
-from fastapi import APIRouter, HTTPException
-from app.models.prediction import HousePredictionInput, HousePredictionOutput
-from app.services.ml_model import HousePricePredictor
-
-router = APIRouter()
-model = HousePricePredictor()
-
-@router.get("/predictions/house-price", 
-    response_model=HousePredictionOutput,
-    summary="Get a house price prediction",
-    description="Predicts the price of a house based on its features"
-)
-async def predict_price(input_data: HousePredictionInput) -> HousePredictionOutput:
-    try:
-        predicted_price, confidence_score, similar_listings = model.predict(
-            input_data.square_feet,
-            input_data.bedrooms,
-            input_data.bathrooms
-        )
-        
-        return HousePredictionOutput(
-            predicted_price=predicted_price,
-            confidence_score=confidence_score,
-            similar_listings=similar_listings
-        )
-    except Exception as e:
-        raise HTTPException(status_code=500, detail=str(e)) 

backend/app/main.py

@@ -1,6 +1,6 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
-from app.routers import predictions
+from backend.app.dtos import predictions
 
 app = FastAPI(
     title="Housing Price Predictor API",

backend/app/providers/db_provider.py

@@ -0,0 +1,118 @@
+
+import os
+import subprocess
+from collections.abc import AsyncGenerator
+from contextlib import asynccontextmanager
+
+import asyncpg
+import pg8000
+import pg8000.dbapi
+from google.cloud.sql.connector import Connector, IPTypes, create_async_connector
+from sqlalchemy import Engine
+from sqlalchemy.ext.asyncio import (
+    AsyncConnection,
+    AsyncEngine,
+    AsyncSession,
+    async_sessionmaker,
+    create_async_engine,
+)
+from sqlmodel import create_engine
+
+from ..config import get_settings
+from ..db.seed import seed
+from ..models.base_db_model import BaseDBModel
+
+
+async def _get_async_engine() -> AsyncEngine:
+    settings = get_settings()
+    if settings.app.environment == "development":
+        engine = create_async_engine(
+            f"postgresql+asyncpg://{settings.db.username}:{settings.db.password}@localhost/{settings.db.db_name}",
+            future=True,
+        )
+    else:
+        connector = await create_async_connector()
+
+        async def getconn() -> asyncpg.Connection:
+            return await connector.connect_async(
+                settings.db.connection_name,
+                "asyncpg",
+                user=settings.db.username,
+                password=settings.db.password,
+                db=settings.db.db_name,
+                ip_type=IPTypes.PUBLIC,
+            )
+
+        engine = create_async_engine("postgresql+asyncpg://", async_creator=getconn, future=True)
+    return engine
+
+
+async def get_session() -> AsyncGenerator[AsyncSession, None]:
+    """
+    Initialize a database session and return it.
+
+    Use this when interacting via the ORM.
+    """
+    engine = await _get_async_engine()
+    async_session = async_sessionmaker(bind=engine, expire_on_commit=False)
+    async with async_session() as session:
+        yield session
+
+
+@asynccontextmanager
+async def get_connection() -> AsyncGenerator[AsyncConnection, None]:
+    """
+    Initialize a database connection and return it.
+
+    Only use this when you need to execute raw SQL queries.
+    """
+    engine = await _get_async_engine()
+    async with engine.connect() as connection:
+        yield connection
+
+    await engine.dispose()
+
+
+def _get_engine() -> Engine:
+    settings = get_settings()
+    if settings.app.environment == "development":
+        engine = create_engine(
+            f"postgresql+pg8000://{settings.db.username}:{settings.db.password}@localhost/{settings.db.db_name}"
+        )
+    else:
+        connector = Connector()
+
+        def getconn() -> pg8000.dbapi.Connection:
+            conn: pg8000.dbapi.Connection = connector.connect(
+                settings.db.connection_name,
+                "pg8000",
+                user=settings.db.username,
+                password=settings.db.password,
+                db=settings.db.db_name,
+                ip_type=IPTypes.PUBLIC,
+            )
+            return conn
+
+        engine = create_engine("postgresql+pg8000://", creator=getconn)
+    return engine
+
+
+def create_db_and_tables():
+    # TODO Move this to use asyncpg
+    engine = _get_engine()
+    BaseDBModel.metadata.create_all(engine)
+
+    if get_settings().app.environment == "development":
+        seed(engine)
+
+
+def startup_migrations():
+    """Run Alembic migrations"""
+    print("Running Alembic migrations...")
+
+    api_path = os.path.dirname(os.path.abspath(__file__)) + "/../.."
+    try:
+        subprocess.run(["alembic", "upgrade", "head"], check=True, cwd=api_path)
+        print("Migrations applied successfully!")
+    except subprocess.CalledProcessError as e:
+        print(f"Error applying migrations: {e}")

backend/requirements.txt

@@ -1,4 +1,5 @@
 fastapi
 uvicorn
 sqlmodel
-pydantic
+pydantic
+sqlalchemy