JSONClasses is a data flow pipeline and data graph framework written in Python. It supports data sanitization, data validation, data transformation, data presentation, data serialization, data graphing and data querying. It eliminates the redundant coding of the process by an intuitive and innovative declarative manner.

JSONClasses uses several Python features like type hinting and dataclasses. With the great metaprogramming functionalities that Python offers, we can easily extend it into a great DSL for declaring data structures, transforming rules and validation rules.

GraphQL's Schema Definition Language cannot work well with programming languages' syntax checking and type completion. To support more and more functions, a DSL would become more and more like a programming language.

This is similar React.js, Jetpack Compose and SwiftUI. The structures of the declaration is embedded in code, not in a special text file.

Python is the programming language which is nearest to AI areas. The era we are living is an era and a generation empowered by AI. AI algorithms empower products with unimaginable stunning features. A great product should adapt to some level of AI to continue providing great functions for it's targeting audience.

Let's say, you are building the base user functionality for a cross-platform dating app.

The product requirements are:

1. Unique phone number is required
2. Password should be secure, encrypted, hidden from response
3. Gender cannot be changed after set
4. This product is adult only
5. User intro should be brief

Let's transform the requirements into code.

from jsonclasses import jsonclass, types

@jsonclass
class User:
  phone_no: str = types.str.unique.index.match(local_phone_no_regex).required #1
  email: str = types.str.match(email_regex)
  password: str = types.str.writeonly.length(8, 16).match(secure_password_regex).transform(salt).required #2
  nickname: str = types.str.required
  gender: str = types.str.writeonce.oneof(['male', 'female']) #3
  age: int = types.int.min(18).max(100) #4
  intro: str = types.str.truncate(500) #5

Look how brief it is to describe our business requirements. JSON Classes has official support for some databases to store data permanently. If you are building a RESTful API, you can integrate JSON Classes with flask or any other web frameworks.

from flask import Blueprint, request, jsonify
from models.article import Article

bp = Blueprint('articles', __name__, url_prefix='/articles')

@bp.get('/')
async def articles(request: Request):
  return jsonify(await User.find())

@bp.get('/<id:string>')
async def user(request, id):
  return jsonify(await User.id(id))

@bp.post('/')
async def create_user(request):
  return jsonify(User(**request.json).save())

@bp.patch('/<id:string>')
async def update_user(request, id):
  return jsonify((await User.id(id)).set(**request.json).save())

@bp.delete('/<id:string>')
async def delete_user(request, id):
  return jsonify((await User.id(id)).delete())

Read the Documentation

• JSON Classes Pymongo The mongodb integration through pymongo driver.

• JSON Classes Sanic The sanic async web framework integration.

jsonclasses supports Python >= 3.9.0.

MIT License

Copyright (c) 2021 Fillmula Inc. Copyright (c) 2020 Reflection Co., Ltd.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.