Assignment completed : shakti chaturvedi

database.py

@@ -0,0 +1,10 @@
+# database.py
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+SQLALCHEMY_DATABASE_URL = "sqlite:///./users.db"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False})
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()

main.py

@@ -0,0 +1,71 @@
+from fastapi import FastAPI, HTTPException, Depends
+from sqlalchemy.orm import Session
+from database import SessionLocal, engine
+import models, schemas
+from pydantic import EmailStr
+
+app = FastAPI()
+
+models.Base.metadata.create_all(bind=engine)
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@app.post("/users/", response_model=schemas.User)
+def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
+    db_user = models.User(**user.dict())
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+@app.get("/users/", response_model=list[schemas.User])
+def read_users(db: Session = Depends(get_db)):
+    return db.query(models.User).all()
+
+@app.get("/users/{user_id}", response_model=schemas.User)
+def read_user(user_id: int, db: Session = Depends(get_db)):
+    user = db.query(models.User).filter(models.User.id == user_id).first()
+    if user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    return user
+
+@app.put("/users/{user_id}", response_model=schemas.User)
+def update_user(user_id: int, user: schemas.UserUpdate, db: Session = Depends(get_db)):
+    db_user = db.query(models.User).filter(models.User.id == user_id).first()
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    for key, value in user.dict(exclude_unset=True).items():
+        setattr(db_user, key, value)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+@app.delete("/users/{user_id}", response_model=schemas.User)
+def delete_user(user_id: int, db: Session = Depends(get_db)):
+    db_user = db.query(models.User).filter(models.User.id == user_id).first()
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    db.delete(db_user)
+    db.commit()
+    return db_user
+
+@app.get("/users/{user_id}/matches", response_model=list[schemas.User])
+def find_matches(user_id: int, db: Session = Depends(get_db)):
+    user = db.query(models.User).filter(models.User.id == user_id).first()
+    if user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    potential_matches = db.query(models.User).filter(
+        models.User.id != user_id,
+        models.User.gender != user.gender,
+        models.User.city == user.city,
+        models.User.interests==user.interests
+    ).all()
+    return potential_matches
+
+
+

models.py

@@ -0,0 +1,14 @@
+# models.py
+from sqlalchemy import Column, Integer, String
+from database import Base
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, index=True)
+    age = Column(Integer)
+    gender = Column(String)
+    email = Column(String, unique=True, index=True)
+    city = Column(String)
+    interests = Column(String)

schemas.py

@@ -0,0 +1,27 @@
+
+from pydantic import BaseModel, EmailStr
+from typing import Optional
+
+class UserBase(BaseModel):
+    name: str
+    age: int
+    gender: str
+    email: EmailStr
+    city: str
+    interests: str
+
+class UserCreate(UserBase):
+    pass
+
+class UserUpdate(BaseModel):
+    name: Optional[str] = None
+    age: Optional[int] = None
+    gender: Optional[str] = None
+    email: Optional[EmailStr] = None
+    city: Optional[str] = None
+    interests: Optional[str] = None
+
+class User(UserBase):
+    id: int
+    class Config:
+        orm_mode = True