remove RemovedInDjango20Warning:
on_delete will be a required arg for ForeignKey in Django 2.0.
Set it to models.CASCADE on models and in existing migrations if you want to
maintain the current default behavior.
See https://docs.djangoproject.com/en/1.11/ref/models/
fields/#django.db.models.ForeignKey.on_delete
The parameter cell create a combox box which update a context variable named,
parameters. Any change to the combobox modify the query string of the current
URL, which modifies the parameters dictionnary in the context. This dictionnary
can be looked up by other celle for parameters. For example the cubes cells
could look for any key with prefix cubes-cut-, for example
cubes-cut-comune=CLAPIERS and produces a cut filter from it.
Valentin Deniaud
Lauréline Guérin
Frédéric Péters
Benjamin Dauvergne