first commit

.gitignore

+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
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+
+# Distribution / packaging
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+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
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+
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+# Translations
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+# Django stuff:
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+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
\ No newline at end of file

README.md

+RUN
+```
+uvicorn src.main:app --reload 
+```
\ No newline at end of file

requirements.txt

 annotated-types==0.5.0

src/__init__.py

+from fastapi import Depends, FastAPI, HTTPException
+from sqlalchemy.orm import Session
+
+from . import crud, models, schemas
+from .database import SessionLocal, engine
+
+models.Base.metadata.create_all(bind=engine)
+
+app = FastAPI()
+
+
+# Dependency
+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 = crud.get_user_by_email(db, email=user.email)
+    if db_user:
+        raise HTTPException(status_code=400, detail="Email already registered")
+    return crud.create_user(db=db, user=user)
+
+
+@app.get("/users/", response_model=list[schemas.User])
+def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    users = crud.get_users(db, skip=skip, limit=limit)
+    return users
+
+
+@app.get("/users/{user_id}", response_model=schemas.User)
+def read_user(user_id: int, db: Session = Depends(get_db)):
+    db_user = crud.get_user(db, user_id=user_id)
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    return db_user
+
+
+@app.post("/users/{user_id}/items/", response_model=schemas.Item)
+def create_item_for_user(
+    user_id: int, item: schemas.ItemCreate, db: Session = Depends(get_db)
+):
+    return crud.create_user_item(db=db, item=item, user_id=user_id)
+
+
+@app.get("/items/", response_model=list[schemas.Item])
+def read_items(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    items = crud.get_items(db, skip=skip, limit=limit)
+    return items

src/crud.py

+from sqlalchemy.orm import Session
+
+from . import models, schemas
+
+
+def create_fake_items():
+    items= []
+    for i in range(5):
+        item = {
+            models.Item.title.name  : f"Item {i+1}",
+            models.Item.description.name : f"Item Description {i+1}"
+        }
+        items.append(item)
+    items = [models.Item(**item) for item in items]
+    return items
+
+def get_user(db: Session, user_id: int):
+    return db.query(models.User).filter(models.User.id == user_id).first()
+
+
+def get_user_by_email(db: Session, email: str):
+    return db.query(models.User).filter(models.User.email == email).first()
+
+
+def get_users(db: Session, skip: int = 0, limit: int = 100):
+    return db.query(models.User).offset(skip).limit(limit).all()
+
+
+def create_user(db: Session, user: schemas.UserCreate):
+    fake_hashed_password = user.password + "notreallyhashed"
+    db_user = models.User(email=user.email, hashed_password=fake_hashed_password)
+    db_user.items.extend(create_fake_items())
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+
+def get_items(db: Session, skip: int = 0, limit: int = 100):
+    return db.query(models.Item).offset(skip).limit(limit).all()
+
+
+def create_user_item(db: Session, item: schemas.ItemCreate, user_id: int):
+    db_item = models.Item(**item.dict(), owner_id=user_id)
+    db.add(db_item)
+    db.commit()
+    db.refresh(db_item)
+    return db_item
+
+
+
+
+def change_image(db:Session):
+    image = db.query(models.Image).first()
+    if image.url == 1 :
+        image.url = 2
+    else :
+        image.url = 1
+    db.commit()
+def get_image(db:Session):
+    image = db.query(models.Image).first()
+    if image is None :
+        image = models.Image(url=1)
+    db.add(image)
+    db.commit()
+    db.refresh(image)
+    return image
\ No newline at end of file

src/database.py

+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+SQLALCHEMY_DATABASE_URL = "sqlite:///./sql_app.db"
+# SQLALCHEMY_DATABASE_URL = "postgresql://user:password@postgresserver/db"
+
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()

src/main.py

+from fastapi import Depends, FastAPI, HTTPException
+from sqlalchemy.orm import Session
+import os
+import pandas as pd
+import io
+from pydantic import Field 
+from fastapi.responses import PlainTextResponse,RedirectResponse,FileResponse,StreamingResponse
+from fastapi_pagination import Page, add_pagination, paginate
+from sqlalchemy import select
+from . import crud, models, schemas
+from .database import SessionLocal, engine
+
+models.Base.metadata.create_all(bind=engine)
+
+app = FastAPI()
+
+
+Page = Page.with_custom_options(
+    size=Field(5,ge=1,le=1000)
+)
+
+
+# Dependency
+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 = crud.get_user_by_email(db, email=user.email)
+    if db_user:
+        raise HTTPException(status_code=400, detail="Email already registered")
+    return crud.create_user(db=db, user=user)
+
+@app.post("/create-fake-users")
+def create_fake_users(db:Session=Depends(get_db)):
+    users = []
+    for i in range(10) :
+        dd = {
+            "email" : f"fake{i+1}@example.com",
+            "password" : f"fake{i+1}@pass"
+        }
+        user = schemas.UserCreate(**dd)
+        uu = crud.create_user(db=db,user=user)
+        users.append(uu)
+    return users
+        
+@app.get("/users/", response_model=list[schemas.User])
+def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    users = crud.get_users(db, skip=skip, limit=limit)
+    return users
+
+@app.get('/users-page')
+def get_users(page: int = 1, page_size: int = 10, db: Session = Depends(get_db)):
+    # Calculate the offset for pagination
+    offset = (page - 1) * page_size
+
+    # Fetch users from the database using SQLAlchemy query
+    users = db.query(models.User).offset(offset).limit(page_size).all()
+
+    # Get the total count of users
+    total_users = db.query(models.User).count()
+
+    # Calculate the next and previous page numbers
+    next_page = page + 1 if (offset + page_size) < total_users else None
+    previous_page = page - 1 if page > 1 else None
+
+    # Construct the response
+    response = {
+        "users": users,
+        "total": total_users,
+        "page": page,
+        "next_page": next_page,
+        "previous_page": previous_page,
+    }
+
+    # Return the response
+    return response
+
+@app.get('/',include_in_schema=False)
+def docs_redirect():
+    docs_url = f"/docs"
+    return RedirectResponse(url=docs_url)
+
+@app.get("/text",response_class=PlainTextResponse)
+def return_text():
+    return "Hello World"
+
+
+@app.get("/image",response_class=FileResponse)
+def return_image(db:Session= Depends(get_db)) :
+    image = crud.get_image(db)
+    return os.path.join("static","images",f"{image.url}.jpg")
+
+@app.get('/change/image')
+def change_image(db:Session= Depends(get_db)) :
+    crud.change_image(db)
+    return "OK"
+
+@app.get('/csv')
+def return_csv (db:Session= Depends(get_db)) : 
+    df = pd.read_sql(
+        sql= db.query(models.User).statement,
+        con =engine
+    )
+    stream = io.StringIO()
+    df.to_csv(stream,index=False)
+    response = StreamingResponse(iter([stream.getvalue()]),media_type="text/csv")
+    response.headers["Content-Disposition"] = "attachment; filename=export.csv"
+    return response
+
+
+@app.get("/excel")
+def return_excel (db:Session=Depends(get_db)):
+    df = pd.read_sql(
+        sql= db.query(models.User).statement,
+        con =engine
+    )
+    stream = io.BytesIO()
+    df.to_excel(stream,index=False)
+    response = StreamingResponse(iter([stream.getvalue()]),media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
+    response.headers["Content-Disposition"] = "attachment; filename=export.xlsx"
+    return response
+
+
+add_pagination(app)

src/models.py

+from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from .database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=False, index=True)
+    hashed_password = Column(String)
+    is_active = Column(Boolean, default=True)
+
+    items = relationship("Item", back_populates="owner")
+
+
+class Item(Base):
+    __tablename__ = "items"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, index=True)
+    description = Column(String, index=True)
+    owner_id = Column(Integer, ForeignKey("users.id"))
+
+    owner = relationship("User", back_populates="items")
+
+
+class Image(Base):
+    __tablename__ = "image"
+    id = Column(Integer,primary_key=True)
+    url = Column(Integer)
+    
+    
\ No newline at end of file

src/schemas.py

+from pydantic import BaseModel
+
+
+class ItemBase(BaseModel):
+    title: str
+    description: str | None = None
+
+
+class ItemCreate(ItemBase):
+    pass
+
+
+class Item(ItemBase):
+    id: int
+    owner_id: int
+
+    class Config:
+        from_attributes = True
+
+
+class UserBase(BaseModel):
+    email: str
+
+
+class UserCreate(UserBase):
+    password: str
+
+
+class User(UserBase):
+    id: int
+    is_active: bool
+    items: list[Item] = []
+
+    class Config:
+        from_attributes = True