system-pri/backend

Installation

Python 3.8 version is required.

python3 --version

Create virtual environment and install packages

virtualenv venv
source ./venv/bin/activate
pip install -r requirements.txt

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Usage

Create .env file and fill with similar data like .env.example. Then run application:

flask run

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Testing

Run tests

pytest

Run all tests in specific python module

pytest ./tests/unit_tests/test_file.py

Run one test inside of python module

pytest ./tests/unit_tests/test_file.py::test_function_name

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Format code:

black path/to/file.py
isort path/to/file.py
flake8

Useful commands:

Add new package

pip install NAME_OF_PACKAGE

Save new added package to requirements

pip freeze > requirements.txt

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Flask commands:

Create the application structure directories

flask startapp NAME_OF_APP

Above command create package structure:
Create serializer in schemas.py file:

from marshmallow import Schema, fields

class ExampleSchema(Schema):
    id = fields.Integer()
    name = fields.Str()

Create models in models.py file:

from ..dependencies import db

class Example(db.Model):
    __tablename__ = "examples"

    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    title = db.Column(db.String(255), unique=True)

Create api routes in routes.py file. You only have to register blueprint in app/__init__.py.

from flask import Blueprint, make_response, jsonify, Response


bp = Blueprint("{name}", __name__, url_prefix="/{name}")


@bp.route("/", methods=["GET"])
def index() -> Response:
    return make_response(jsonify({{"hello": "{name}"}}), 200)

Print all your routes

flask routes

Create migration, but first you have to create model

flask db migrate

Apply your changes to database, use after migration command

flask db upgrade

If you want back changes in your databases, use below command

flask db downgrade

Create empty migration, you can write manually migration here.

flask db revision