Backend con base de datos relacional MySQL

backend/api/database/connection.py

@@ -0,0 +1,18 @@
+import os
+from sqlalchemy import create_engine
+
+DB_USER = "root"
+DB_PASSWORD = "root"
+DB_HOST = "db"
+DB_PORT = "3306"
+DB_NAME = "deckofcards"
+
+DATABASE_URL = (
+    f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}"
+)
+
+engine = create_engine(
+    DATABASE_URL,
+    pool_pre_ping=True,
+    echo=False
+)

backend/api/database/init_db.py

@@ -0,0 +1,5 @@
+from .connection import engine
+from .models import Base
+
+def init_db():
+    Base.metadata.create_all(bind=engine)

backend/api/database/models.py

@@ -0,0 +1,14 @@
+from sqlalchemy.orm import declarative_base
+from sqlalchemy import Column, Integer, String, Float
+
+Base = declarative_base()
+
+class DoCMFLevel(Base):
+    __tablename__ = "docmf_levels"
+
+    id = Column(Integer, primary_key=True, index=True)
+    term = Column(String(50), nullable=False)
+    core_a = Column(Float, nullable=False)
+    core_b = Column(Float, nullable=False)
+    support_c = Column(Float, nullable=False)
+    support_d = Column(Float, nullable=False)

backend/api/database/session.py

@@ -0,0 +1,15 @@
+from sqlalchemy.orm import sessionmaker
+from .connection import engine
+
+SessionLocal = sessionmaker(
+    autocommit=False,
+    autoflush=False,
+    bind=engine
+)
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

backend/api/main.py

@@ -1,14 +1,25 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
+from contextlib import asynccontextmanager
 
-from routers.value_function import router as value_router
-from routers.docmf_build import router as docmf_build_router
-from routers.docmf_evaluate import router as docmf_eval_router
-from routers.docmf_simple_validation import router as simple_validation_router
-from routers.docmf_validation import router as validation_router
+from api.database.init_db import init_db
+
+# Routers
+from api.routers.test_db import router as test_db_router
+from api.routers.value_function import router as value_router
+from api.routers.docmf_build import router as docmf_build_router
+from api.routers.docmf_evaluate import router as docmf_eval_router
+from api.routers.docmf_simple_validation import router as simple_validation_router
+from api.routers.docmf_validation import router as validation_router
 
 
-app = FastAPI()
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    init_db()
+    yield
+
+
+app = FastAPI(lifespan=lifespan)
 
 app.add_middleware(
     CORSMiddleware,
@@ -18,6 +29,7 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+app.include_router(test_db_router, prefix="/api")
 app.include_router(value_router, prefix="/api/criteria/doc")
 app.include_router(docmf_build_router, prefix="/api/criteria/doc-mf")
 app.include_router(docmf_eval_router, prefix="/api/criteria/doc-mf")

backend/api/routers/docmf_build.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, HTTPException
-from models.docmf_models import DoCMFMultiRequest
-from services.docmf_build_service import build_docmf_multi
+from api.models.docmf_models import DoCMFMultiRequest
+from api.services.docmf_build_service import build_docmf_multi
 
 router = APIRouter()
 

backend/api/routers/docmf_evaluate.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, HTTPException
-from models.evaluation_models import EvaluationRequest
-from services.docmf_evaluate_service import evaluate_docmf
+from api.models.evaluation_models import EvaluationRequest
+from api.services.docmf_evaluate_service import evaluate_docmf
 
 router = APIRouter()
 

backend/api/routers/docmf_simple_validation.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, HTTPException
-from models.docmf_simple_validation_models import SimpleValidationRequest
-from services.docmf_simple_validation_service import validate_simple_levels
+from api.models.docmf_simple_validation_models import SimpleValidationRequest
+from api.services.docmf_simple_validation_service import validate_simple_levels
 
 router = APIRouter()
 

backend/api/routers/docmf_validation.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, HTTPException
-from models.docmf_validation_models import ValidationRequest
-from services.docmf_validation_service import validate_levels
+from api.models.docmf_validation_models import ValidationRequest
+from api.services.docmf_validation_service import validate_levels
 
 router = APIRouter()
 

backend/api/routers/test_db.py

@@ -0,0 +1,13 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy import text
+from api.database.session import get_db
+
+router = APIRouter()
+
+@router.get("/test-db")
+def test_db_connection(db=Depends(get_db)):
+    try:
+        db.execute(text("SELECT 1"))
+        return {"status": "ok", "message": "Conexión a MySQL correcta"}
+    except Exception as e:
+        return {"status": "error", "message": str(e)}

backend/api/routers/value_function.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, HTTPException
-from models.value_function_models import ValueFunctionRequest
-from services.value_function_service import compute_value_function, compute_points
+from api.models.value_function_models import ValueFunctionRequest
+from api.services.value_function_service import compute_value_function, compute_points
 
 router = APIRouter()
 

backend/api/services/docmf_evaluate_service.py

@@ -1,4 +1,4 @@
-from utils.interpolation import linear_interpolation
+from api.utils.interpolation import linear_interpolation
 
 def evaluate_docmf(request):
     x = request.x