🎉 Initialize FastAPI boilerplate

app/alembic.ini

@@ -0,0 +1,108 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to migrations/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = driver://user:pass@localhost/dbname
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

app/config.py

@@ -0,0 +1,14 @@
+import os
+from dotenv import load_dotenv
+from pathlib import Path
+
+env_path = Path('..') / '.env'
+load_dotenv(dotenv_path=env_path)
+
+
+class Settings:
+    app_name: str = "Awesome API"
+    admin_email: str
+    items_per_user: int = 50
+
+    DATABASE_URL: str = os.getenv("DATABASE_URL")

app/crud/__init__.py

@@ -0,0 +1 @@
+from .item import item

app/crud/base.py

@@ -0,0 +1,70 @@
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
+from fastapi import HTTPException
+
+from database import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+
+        **Parameters**
+
+        * `model`: A SQLAlchemy model class
+        * `schema`: A Pydantic model (schema) class
+        """
+        self.model = model
+
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        result = db.query(self.model).filter(self.model.id == id).first()
+        if not result:
+            raise HTTPException(status_code=404, detail="Item not found")
+        return result
+
+    def get_multi(
+        self, db: Session, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        return db.query(self.model).offset(skip).limit(limit).all()
+
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)  # type: ignore
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self,
+        db: Session,
+        *,
+        db_obj: ModelType,
+        obj_in: Union[UpdateSchemaType, Dict[str, Any]]
+    ) -> ModelType:
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def remove(self, db: Session, *, id: int) -> ModelType:
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj

app/crud/item.py

@@ -0,0 +1,40 @@
+from fastapi import HTTPException
+from sqlalchemy.orm import Session
+
+from models import Item
+from schemas.schemas import ItemCreate, ItemUpdate
+from crud.base import CRUDBase
+
+
+class CRUDItem(CRUDBase[Item, ItemCreate, ItemUpdate]):
+    pass
+    # def get_item(self, db: Session, item_id: int):
+        # item = db.query(Item).filter(Item.id == item_id).first()
+        # if not item:
+            # raise HTTPException(status_code=404, detail="Item not found")
+        # return item
+
+    # def get_items(self, db: Session, skip: int = 0, limit: int = 100):
+        # return db.query(Item).offset(skip).limit(limit).all()
+
+    # def create_item(self, db: Session, item: ItemCreate):
+        # db_item = Item(title=item.title, description=item.description)
+        # db.add(db_item)
+        # db.commit()
+        # db.refresh(db_item)
+        # return db_item
+
+    # def update_item(self, db: Session, item: ItemUpdate):
+        # db_item = Item(title=item.title, description=item.description)
+        # db.add(db_item)
+        # db.commit()
+        # db.refresh(db_item)
+        # return db_item
+
+    # def delete_item(self, db: Session, item_id: int):
+        # db.query(Item).filter(Item.id == item_id).first().delete()
+        # db.commit()
+        # return
+
+
+item = CRUDItem(Item)

app/database.py

@@ -0,0 +1,15 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+import config
+
+SQLALCHEMY_DATABASE_URL = config.Settings.DATABASE_URL
+# SQLALCHEMY_DATABASE_URL = "postgresql://user:password@postgresserver/db"
+
+print(SQLALCHEMY_DATABASE_URL)
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()

app/main.py

@@ -0,0 +1,51 @@
+from fastapi import Depends, FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from sqlalchemy.orm import Session
+from schemas import schemas
+import database
+import crud
+
+app = FastAPI()
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"]
+)
+
+
+# Dependency
+def get_db():
+    db = database.SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+@app.get("/")
+async def root():
+    return {"message": "Hello World"}
+
+
+@app.get("/items/{item_id}", response_model=schemas.Item)
+async def get_item(*, db: Session = Depends(get_db), item_id: int):
+    return crud.item.get(db, item_id)
+
+
+@app.get("/items/", response_model=list[schemas.Item])
+async def get_items(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    return crud.item.get_multi(db, skip=skip, limit=limit)
+
+
+@app.post("/items/", response_model=schemas.Item)
+async def create_item(item: schemas.ItemCreate, db: Session = Depends(get_db)):
+    return crud.item.create(db=db, item=item)
+
+
+@app.put("/items/{item_id}", response_model=schemas.ItemUpdate)
+async def update_item(item: schemas.ItemUpdate, db: Session = Depends(get_db)):
+    return crud.item.update(db=db, item=item)
+
+
+@app.delete("/items/{item_id}")
+async def delete_item(*, item: schemas.ItemUpdate, db: Session = Depends(get_db), item_id: int):
+    return crud.remove(item_id)

app/models/__init__.py

@@ -0,0 +1 @@
+from .item import Item

app/models/item.py

@@ -0,0 +1,11 @@
+from sqlalchemy import Boolean, Column, Integer, String
+
+from database import Base
+
+
+class Item(Base):
+    __tablename__ = "item"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, index=True)
+    description = Column(String, index=True)

app/requirements.txt

@@ -0,0 +1,18 @@
+alembic==1.11.2
+annotated-types==0.5.0
+anyio==3.7.1
+click==8.1.6
+fastapi==0.101.0
+greenlet==2.0.2
+h11==0.14.0
+idna==3.4
+Mako==1.2.4
+MarkupSafe==2.1.3
+pydantic==2.1.1
+pydantic_core==2.4.0
+python-dotenv==1.0.0
+sniffio==1.3.0
+SQLAlchemy==2.0.19
+starlette==0.27.0
+typing_extensions==4.7.1
+uvicorn==0.23.2

app/schemas/schemas.py

@@ -0,0 +1,21 @@
+from pydantic import BaseModel
+
+
+class ItemBase(BaseModel):
+    title: str
+    description: str | None = None
+
+
+class Item(ItemBase):
+    id: int
+
+    class Config:
+        from_attributes = True
+
+
+class ItemCreate(ItemBase):
+    pass
+
+
+class ItemUpdate(ItemBase):
+    pass