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https://github.com/leosimoes/rocketseat-nlw-python-flask-codigodebarras
Rocketseat's NLW event project using Python and Flask to generate barcode.
https://github.com/leosimoes/rocketseat-nlw-python-flask-codigodebarras
barcode flask pillow pytest python
Last synced: 24 days ago
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Rocketseat's NLW event project using Python and Flask to generate barcode.
- Host: GitHub
- URL: https://github.com/leosimoes/rocketseat-nlw-python-flask-codigodebarras
- Owner: leosimoes
- Created: 2024-02-08T13:31:59.000Z (11 months ago)
- Default Branch: master
- Last Pushed: 2024-02-14T20:37:29.000Z (11 months ago)
- Last Synced: 2024-02-14T21:39:17.893Z (11 months ago)
- Topics: barcode, flask, pillow, pytest, python
- Language: Python
- Homepage:
- Size: 372 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Rocketseat - NLW - Python - Flask - Barcode
Rocketseat's NLW event project using Python and Flask to generate barcode.
## Steps
1. Create Flask project in PyCharm:
2. Install other dependencies:
- pillow
- python-barcode
- Cerberus
- pytest
3. Change `app.py`:
- remove route `/`;
- add route `POST '/create_tag'` which receives "product_code" and creates an image in the program folder;
4. Test route `http://127.0.0.1:5000/create_tag` with Postman passing ```{"tag path": "987-654-321"}```;
5. Create directories:
- from the project root: `/src`, `/src/controllers`, `/src/drivers`, `/src/errors`, `/src/main`,
`/src/main/routes`, `/src/main/server`, `/src/validators`, `/src/views`, `/src/views/http_types`
- everyone must have a `__init__.py` file
6. Extract part of the code from `app.py` to
- `server.py`: creates app and registers Blueprints
- `tag_routes.py`: creates a Blueprint for the `POST '/create_tag'` route
7. Extract part of the `create_tag` function code from `tag_routes.py` to the files:
- `src/drivers/barcode_handler.py` with the BarcodeHandler class;
- `src/views/tag_creator_view.py` with the TagCreatorView class;
- `src/controllers/tag_creator_controller.py` with the TagCreatorController class;
- `src/views/http_types/http_request.py` with the HttpRequest class;
- `src/views/http_types/http_response.py` with the HttpResponse class.
8. Create a function to display an error after handling it with `try except`:
- `src/errors/error_handler.py` with `handle_errors` function;
- function `create_tag` handles exceptions with `try except`.
9. Add custom error and validation:
- `src/errors/error_types/http_unprocessable_entity.py` with class `HttpUnprocessableEntityError`;
- `src/validators/tag_creator_validator.py` with the `tag_creator_validator` function.
10. Create tests:
- test file names must end with `_test.py`;
- `pytest -s -v` to run all tests in the directory.
## Certificate
