FastAPI Boilerplate

Overview

FastAPI Boilerplate

Features

  • SQlAlchemy session
  • Custom user class
  • Top-level dependency
  • Dependencies for specific permissions
  • Celery

SQLAlchemy for asyncio context

Session

from core.db import session

Just import session and use it.

Transaction

To guarantee of transaction, session's autocommit option is True.

So you have to use Transaction class.

from core.db import Transaction, session


@Transaction()
async def create_user(self):
    session.add(User(email="[email protected]"))

Usage as decorator.

from core.db import Transaction, session


with Transaction():
    session.add(User(email="[email protected]"))

Usage as context manager.

In this case, only one transaction is supported.

Note. Do not use explicit commit(). Transaction class automatically do.

Custom user for authentication

from fastapi import Request


@home_router.get("/")
def home(request: Request):
    return request.user.id

Note. you have to pass jwt token via header like Authorization: Bearer 1234

Custom user class automatically decodes header token and store user information into request.user

If you want to modify custom user class, you have to update below files.

  1. core/fastapi/schemas/current_user.py
  2. core/fastapi/middlewares/authentication.py

CurrentUser

class CurrentUser(BaseModel):
    id: int = None

Simply add more fields based on your needs.

AuthBackend

current_user = CurrentUser()

After line 18, assign values that you added on CurrentUser.

Top-level dependency

Note. Available from version 0.62 or higher.

Set a callable function when initialize FastAPI() app through dependencies argument.

Refer Logging class inside of core/fastapi/dependencies/logging.py

Dependencies for specific permissions

Permissions IsAdmin and IsAuthenticated have already been implemented.

from core.fastapi.dependencies import (
    PermissionDependency,
    IsAdmin,
)


user_router = APIRouter()


@user_router.get(
    "",
    response_model=List[GetUserListResponseSchema],
    response_model_exclude={"id"},
    responses={"400": {"model": ExceptionResponseSchema}},
    dependencies=[Depends(PermissionDependency([IsAdmin]))],  # HERE
)
async def get_user_list(limit: int = 10, prev: int = None):
    pass

Insert permission through dependencies argument.

If you want to make your own permission, inherit BasePermission and implement has_permission() function.

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