AFIP integration for django
Project description
django-afip is a django application for interacting with AFIP’s web-services (and models all related data). For the moment only WSFE and WSAA are implemented.
Instalation
First install the actual package:
pip install django-afip
And then configure your project to use it by adding it to settings.py:
INSTALLED_APPS = (
...
'django_afip',
...
)
Getting started
First of all, you’ll need to create a TaxPayer instance, and upload the related ssl key and certificate (for authorization).
django-afip includes admin views for every model included, and it’s the recommended way to create TaxPayer objects.
Once you have created a TaxPayer, you’ll need its points of sales. This, again, can be done via the admin by selecting “fetch points of sales’. You may also do this programmatically via TaxPayer.fetch_points_of_sales.
Finally, you’ll need to pre-populate certain models with AFIP-defined metadata (ReceiptTypes, DocumentTypes and a few others).
Rather than include fixtures which require updating over time, we fetch this information from AFIP’s web services via an included django management command. This command is idempotent, and running it more than once will not create any duplicate data. To fetch all metadata, simply run:
python manage.py afipmetadata
This metadata can also be downloaded programmatically, via models.populate_all().
You are now ready to start creating and validating receipts. While you may do this via the admin as well, you probably want to do this programmatically or via some custom view.
PDF Receipts
Version 1.2.0 introduces PDF-generation for validated receipts. These PDFs are backed by the ReceiptPDF model.
There are two ways of creating these objects; you can do this manually, or via these steps:
Creating a TaxPayerProfile object for your TaxPayer, with the right default values.
Create the PDFs via ReceiptPDF.objects.create_for_receipt().
Add the proper ReceiptEntry objects to the Receipt. Each ReceiptEntry represents a line in the resulting PDF file.
The PDF file itself can then be generated via:
# Save the file as a model field into your MEDIA_ROOT directory: receipt_pdf.save_pdf() # Save to some custom file-like-object: receipt_pdf.save_pdf_to(file_object)
The former is usually recommended since it allows simpler interaction via standard django patterns.
Exposing receipts
Generated PDF files may be exposed both as pdf or html with an existing view, for example, using:
url(
r'^invoices/pdf/(?P<pk>\d+)?$',
views.ReceiptPDFView.as_view(),
name='receipt_view',
),
url(
r'^invoices/html/(?P<pk>\d+)?$',
views.ReceiptHTMLView.as_view(),
name='receipt_view',
),
You’ll generally want to subclass this view, and add some authorization checks to it. If you want some other, more complex generation (like sending via email), these views should serve as a reference to the PDF API.
The template used for the HTML and PDF receipts is found in templates/django_afip/invoice.html. If you want to override the default (you probably do), simply place a template with the same path/name inside your own app, and make sure it’s listed before django_afip in INSTALLED_APPS.
Contributing
Unit tests are run via tox. Any code contributions must pass all tests. New features must include corresponding unit tests. Any bugfixes must include tests that fail without it, and pass with it.
Note that tests use AFIP’s testing servers and a specific key that’s know to contain at least one point of sale.
CI
CI does not use the in-tree test key/certificate, but ones provided via environment variables. This allows re-running older commits after their in-tree certificate has expired, by merely updating the CI configuration.
Note that the CI variables need to have newlines replaced with the \n sequence.
Caveats
While the app can have production and sandbox users co-exist, metadata models (tax types, receipt types, etc) will be shared between both. In theory, these should never diverge upstream. If they do, we are not prepared to handle it (though it is expected that an update will be available when this change is announced upstream).
Licence
This software is distributed under the ISC licence. See LICENCE for details.
Copyright (c) 2015 Hugo Osvaldo Barrera <hugo@barrera.io>
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