Flask-jsonapi

JSONAPI 1.0 server implementation for Flask.

Installation

This package requires at least python 3.7. To install run: pip install flask-jsonapi. You can install SQLAlchemy support with: pip install flask-jsonapi[sqlalchemy].

Documentation

Full documentation is available at: https://flask-jsonapi.readthedocs.io/.

Simple example

Let’s create a working example of a minimal Flask application. It will expose a single resource Article as a REST endpoint with fetch/create/update/delete operations. For persistence layer, it will use an in-memory SQLite database with SQLAlchemy for storage.

Configuration

import flask
import sqlalchemy
from sqlalchemy.orm import scoped_session
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from marshmallow_jsonapi import Schema, fields

import flask_jsonapi
from flask_jsonapi.resource_repositories import sqlalchemy_repositories

db_engine = sqlalchemy.create_engine('sqlite:///')
session = scoped_session(sessionmaker(bind=db_engine))
Base = declarative_base()
Base.query = session.query_property()

class Article(Base):
    __tablename__ = 'articles'
    id = sqlalchemy.Column(sqlalchemy.Integer, primary_key=True)
    title = sqlalchemy.Column(sqlalchemy.String)

Base.metadata.create_all(db_engine)

class ArticleRepository(sqlalchemy_repositories.SqlAlchemyModelRepository):
    model = Article
    instance_name = 'articles'
    session = session

class ArticleSchema(Schema):
    id = fields.Int()
    title = fields.Str()

    class Meta:
        type_ = 'articles'
        strict = True

class ArticleRepositoryViewSet(flask_jsonapi.resource_repository_views.ResourceRepositoryViewSet):
    schema = ArticleSchema
    repository = ArticleRepository()

app = flask.Flask(__name__)
api = flask_jsonapi.Api(app)
api.repository(ArticleRepositoryViewSet(), 'articles', '/articles/')
app.run(host='127.0.0.1', port=5000)

Usage

Create a new Article with title “First article”:

curl -H 'Content-Type: application/vnd.api+json' \
    -H 'Accept: application/vnd.api+json' \
    http://localhost:5000/articles/ \
    --data '{"data": {"attributes": {"title": "First article"}, "type": "articles"}}' \
    2>/dev/null | python -m json.tool

Result:

{
    "data": {
        "type": "articles",
        "id": 1,
        "attributes": {
            "title": "First article"
        }
    },
    "jsonapi": {
        "version": "1.0"
    }
}

Get the list of Articles:

curl -H 'Accept: application/vnd.api+json' \
    http://localhost:5000/articles/ \
    2>/dev/null | python -m json.tool

Result:

{
    "data": [
        {
            "type": "articles",
            "id": 1,
            "attributes": {
                "title": "First article"
            }
        }
    ],
    "jsonapi": {
        "version": "1.0"
    },
    "meta": {
        "count": 1
    }
}

Running tests

virtualenv -p python3.7 ~/flask-jsonapi-virtualenv
. ~/flask-jsonapi-virtualenv/bin/activate
pip install -r base_requirements.txt
pip install -U pytest==3.0.5
pytest

Credits

Some parts of this project were written based on Flask-REST-JSONAPI.