==========================
Tuesday, February 23, 2016
==========================


I am still in the final sprint for Lino Voga.

The first release with splitted Lino
====================================

I upgraded :ref:`voga` on the :ref:`eiche` server in order to show to
Alexa my first suggestion for :ticket:`787`. Some translations and
layout optimizations.

When running :cmd:`git pull` I still had some messages of style
:message:`rm: remove write-protected regular file
'./lino_xl.lib.courses/models.pyc'?` which I now hopefully fixed by
doing::

  $ sudo chown -R admin:admin ~/repositories

As expected, restoring the snapshot failed with a traceback::

    $ python manage.py run snapshot/restore.py
    ...
    Traceback (most recent call last):
      ...
      File "cal_room.py", line 4, in <module>
        loader.save(create_cal_room(1,[u'Eupen (Spiegelsaal)', u'Eupen (salle miro\xeet\xe9e)'],101,None,None,6,2))
      File "snapshot/restore.py", line 437, in create_cal_room
      ...
    TypeError: 'tariff_id' is an invalid keyword argument for this function

This was because I did not write a migrator for yesterday's database
changes.  I didn't do this because it is easier to just edit the
:xfile:`restore.py` file. That file contains::

    def create_cal_room(id, name, company_id, contact_person_id, contact_role_id, tariff_id, calendar_id):
        kw = dict()
        kw.update(id=id)
        if name is not None: kw.update(bv2kw('name',name))
        kw.update(company_id=company_id)
        kw.update(contact_person_id=contact_person_id)
        kw.update(contact_role_id=contact_role_id)
        kw.update(tariff_id=tariff_id)
        kw.update(calendar_id=calendar_id)
        return cal_Room(**kw)
    
I just needed to change the line with `tariff_id` into::
    
        kw.update(fee_id=tariff_id)

And similar for `create_courses_line` and `create_courses_course`.
    
En passant I found a workaround for :ticket:`788`. The problem was
caused by the following virtual column::


    @dd.virtualfield(dd.HtmlBox(_("Participant")))
    def pupil_info(cls, self, ar):
        elems = [ar.obj2html(self.pupil,
                             self.pupil.get_full_name(nominative=True))]
        elems += [', ']
        elems += join_elems(
            list(self.pupil.address_location_lines()),
            sep=', ')
        return E.div(*elems)

The real guilty is :mod:`lino.utils.html2odf` who does not know how to
convert this to valid ODF, but we can avoid our problem by changing
the last line into::

        return E.p(*elems)

Linking places to a map image
=============================

Google Maps knows about `Vana-Vigala
<https://www.google.ee/maps/place/Vana-Vigala,+78003+Rapla+County/@58.7726168,24.2192473,13z/data=!3m1!4b1!4m2!3m1!1s0x46ed3940640fcbd9:0xab9ab4b052666943>`__.
And of course Google Maps has an API to embed this map into an iframe
`<iframe>`.
But that API is probably not
free and I won't invest my time into this unless somebody forces me
(e.g. using money ;-)

But also OpenStreetMap knows `Vana-Vigala
<https://www.openstreetmap.org/relation/354530>`__, and they have a
quick HTML snippet with an `<iframe>`:

.. raw:: html

    <iframe width="425" height="350" frameborder="0" scrolling="no"
    marginheight="0" marginwidth="0"
    src="http://www.openstreetmap.org/export/embed.html?bbox=24.140567779541016%2C58.756449286833046%2C24.301071166992188%2C58.82031895274005&amp;layer=mapnik"
    style="border: 1px solid black">
    </iframe>
    <br/>
    <small>
    <a href="http://www.openstreetmap.org/#map=13/58.7884/24.2208">Bigger
    map</a>
    </small>

So it should be possible to automatically include such a picture on a
virtual field in a Lino application.

But why is the village border missing on the iframe while it is
visible when using the link to the "relation"?


Inheriting quick search fields
==============================

I changed the kernel's (:mod:`lino.core.kernel`) behaviour about how
:attr:`quick_search_fields
<lino.core.model.Model.quick_search_fields>` should be
inherited. Until now they were *never* inherited, even not from an
abstract base class. Now they are *always* inherited. If you want to
not inherit them from a parent using standard MRO, then you must set
that field explictly to `None`.

Manually settable simulated date
================================

Until now we had :attr:`lino.core.site.Site.the_demo_date` which is
useful when generating demo data. 

Now we also have
:attr:`lino.modlib.system.models.SiteConfig.simulate_today` which is
useful e.g. when Alexa needs to generate invoices *à postériori*.

Miscellaneous
=============

- Compute amount when fee changed.
- Some tables still used some old versino of
  :meth:`get_simple_parameters<lino.core.actors.Actor.get_simple_parameters>`