Skip to main content

Flask blueprints with SQLAlchemy for APIs -- what can I do to simplify?

I am designing an app that has a database, a CRUD web interface to manage its content, and exposing a REST API to be called by an external UI written in React. I am using native Flask Blueprints, SQLAlchemy, along with Marshmallow for API serialization.

The way I have structured Blueprints, based on what I learned from the Flask docs, seems unnecessarily complicated:

  • app.py -> __init__.py.create_app() registers blueprints
    • "factory" Flask pattern
    • each blueprint imports from a routes module
    • register_blueprint specifies two blueprints one for HTML, another for API as each has a different url_prefix
  • each routes module __init__.py
    • imports Blueprint, then
    • creates the blueprint instances for html and api, then
    • imports the actual routes for the module (e.g. from routes.user import routes)
  • each routes implementation
    • imports the blueprints created in the module
    • imports the SQLAlchemy model and Marshmallow schema
    • creates the code for the routes, and decorates with the correct blueprint depending on HTML or API
  • each model imports required elements for SQLAlchemy

So the SQLAlchemy approach seems just right: in one place I define all the characteristics of the model and thus the associated database tables, as well as the schema for JSON output of my API.

But the Blueprints approach seems convoluted, with dependencies scattered about -- to define one new route, I typically have to modify three files:

  • app module (__init.py__)
  • routes module for the specific route (routes/user/__init.py__)
  • routes implementation for the specific route (routes/user/routes.py)
  • and each of these implicitly depend on the model for the entity (e.g. user)

All of this is functional, but I am assuming there's a simpler way to approach the problem that I have not yet fully grasped. Is there a simpler, cleaner way to implement this?



source https://stackoverflow.com/questions/77664284/flask-blueprints-with-sqlalchemy-for-apis-what-can-i-do-to-simplify
Labels:

Comments

Post a Comment

Popular posts from this blog

Confusion between commands.Bot and discord.Client | Which one should I use?

Whenever you look at YouTube tutorials or code from this website there is a real variation. Some developers use client = discord.Client(intents=intents) while the others use bot = commands.Bot(command_prefix="something", intents=intents) . Now I know slightly about the difference but I get errors from different places from my code when I use either of them and its confusing. Especially since there has a few changes over the years in discord.py it is hard to find the real difference. I tried sticking to discord.Client then I found that there are more features in commands.Bot . Then I found errors when using commands.Bot . An example of this is: When I try to use commands.Bot client = commands.Bot(command_prefix=">",intents=intents) async def load(): for filename in os.listdir("./Cogs"): if filename.endswith(".py"): client.load_extension(f"Cogs.{filename[:-3]}") The above doesnt giveany response from my Cogs ...
Post a Comment
Read more

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more