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()