# 20160215 (Monday, 15 February 2016)¶

I did some changes to https://github.com/lsaffre/dblog after feedback from James who is starting to get his developer blog up and running (and published).

I continued to work on #701. A room, in Lino Voga, no longer overrides __unicode__ to add the city name. This was just a stupid idea of mine and irritating magic.

Repaired several tests which were failing with UnicodeErrors caused by Hamza’s recent changes in atelier. Most notably the test_simple_doctests method now must use atelier.doctest_utf8 again.

After committing everything, the Lino test suite still broke on Travis. Yes of course, I must release atelier to PyPI so that the new test_simple_doctests method gets used.

But before doing this, I did yet another subtle change in atelier about docs_rsync_dest. Because I guess that James will soon stumble over this “design flaw”: until now it was not possible to specify a template as the on in the example on https://github.com/lsaffre/dblog

#777. Cannot reproduce it on my machine. I guess it is related to the fact that on their site we use WKHTMLTOPDF_CMD to run it within xvfb-run. Maybe I must set the html encoding in my generated temporay html file (presence_sheet.html).

## Coverage¶

I had a voice session with Sandeep to introduce him to #463. Current output (in atelier) is:

\$ inv invlib.cov
Running tests for 'atelier' within coverage...
.......
----------------------------------------------------------------------
Ran 7 tests in 1.346s

OK
Name                                                             Stmts   Miss  Cover
------------------------------------------------------------------------------------
atelier/invlib.py                                                  336    332     1%
atelier/projects.py                                                118    116     2%
/virtualenvs/py27/lib/python2.7/site-packages/invoke/config.py     223    217     3%
------------------------------------------------------------------------------------
TOTAL


But these numbers are wrong, the percentage is not that low. It is because coverage does not “see” the tests which are being run in a subprocess. I seem to set the COVERAGE_PROCESS_START variable, but for some reason this has no effect.

## How Lino Voga generates invoices¶

The general functionality for automatically generating invoices is in lino_cosi.lib.auto.sales which extends lino_xl.lib.sales.

On the user-visible level it adds a CreateInvoice action per partner, a table InvoicesToCreate to the main menu, and a field invoiceable per invoice item.

On the API level it defines the Invoiceable mixin.

It also defines two utility functions get_invoiceables_for and create_invoice_for.

Lino Voga uses this functionality by extending Enrolment so that it inherits from Invoiceable. In Lino Voga, enrolments are the things for which they write invoices.

An important new challenge appeared when I was in Belgium: they recently started to have a new invoicing method which they name “Abo-Kurse” (“Subscription courses”). #766 is to implement a first proof of concept. A subscription course does not end and start at a given date, the course itself is continously being given. Participants can start on any time of the year. They usually pay for 12 sessions in advance (the first invoice for that enrolment), and Lino must write a new invoice every 12 weeks.