FastAPI Restify

This project helps create a restful api using FastAPI and pydantic with storage engines including file and mongodb.

The project uses pydantic to map incoming request body data into a storage format.

The project provides

• File database implementing list, get, insert, update, replace, delete
• Mongo database implementing list, get, insert, update, replace, delete
• FastAPI router with routes for each HTTP verb get, post, put, patch, delete
• Authentication helpers including a FastAPI router for login and create user plus a token_listener dependancy for ensuring login on a route

This project is based on the example provided by https://github.com/Youngestdev/fastapi-mongo.

Usage

1. First up install the package pip install fastapi_mongo_restify

2. Then create a model object that extends MongoDatabase (or FileDatabase)

• provides pydantic model classes as class variables, updateModelClass and insertModelClass. The insert model is applied to parsing POST requests and the update model is used for PUT/PATCH requests.
• calls super().__init('collectionName') in it's constructor

from fastapi_restify.mongo_database import MongoDatabase

from pydantic import BaseModel, EmailStr, Field

# used to map request parameters on insert/post
class InsertOrderModel(BaseModel):
    name : str
    status: str
    time_started: int
    time_completed: int
        
# used to map request parameters on update/put
class UpdateOrderModel(BaseModel):
    id: int = Field(..., alias='_id')  # update model needs an id field aliased to _id
    name : str
    status: str
    time_started: int
    time_completed: int
   
class OrdersModel(MongoDatabase):
    # used by router for parameter mapping
    updateModelClass = UpdateOrderModel
    insertModelClass = InsertOrderModel
    
    def __init__(self, name = 'orders'): 
        super().__init__(name)

3. Use the restify router in your app, passing an instance of your model to the router and specifying the url prefix.

from fastapi import FastAPI, Depends
from fastapi_restify.restful_router import get_router
from orders_model_mongo import OrdersModel
orders_model = OrdersModel()

app = FastAPI(title='Test FastAPI Mongo Restify')
app.include_router(get_router(orders_model), tags=["Orders"], prefix="/orders") 

4. start your app with uvicorn

import uvicorn

if __name__ == '__main__':
    uvicorn.run('app:app', host="0.0.0.0", port=8080, reload=True)

5. Open http://localhost:8080/docs to see the FASTAPI generated documentation for your API.

Authentication

To use authentication, include the admin router and token_listener. !! Note that authentication is incomplete and create_user is exposed as a public endpoint.

from fastapi_restify.auth.jwt_bearer import JWTBearer
from fastapi_restify.auth.admin_router import router as AdminRouter

app.include_router(AdminRouter, tags=["Administrator"], prefix="/admin")
token_listener = JWTBearer()
# protect the products endpoint
app.include_router(get_router(products_model), tags=["Products"], prefix="/products" , dependencies=[Depends(token_listener)])

Change Callbacks

The database classes can be called with a dict of callbacks with keys insert, update, replace, delete . When a data modification is applied the callback is triggered with dict parameter including modification type and modified record. This behavior is intended to facilitate websocket streaming of changes posted through the restful API.

TODO

https://pynamodb.readthedocs.io/en/latest/local.html