Documentation for "choices" should mention "get_FOO_display"

[James Bennett]

The documentation for the choices attribute on model fields mentions that choices should be a tuple of 2-tuples, including an actual value and a human-readable name, but documentation on how to retrieve the human-readable name of the selected choice from an instance of the model lives elsewhere, in the database API documentation, under the unintuitive name of get_FOO_display. This hinders a new user of Django trying to understand how best to make use of choices.

At the very least, the model documentation should include, under choices, a link to the get_FOO_display entry in the DB documentation for an explanation of how to get the human-readable name back out of a model instance. Ideally, we'd do that and come up with better titles for the sections on the various get_FOO_display/get_next_by_FOO/etc. methods.

[James Bennett]

Patch pointing out get_FOO_display in "choices" docs

[Jacob]

(In [4625]) Fixed #3455: added documentation of Model.get_FIELD_display(). Thanks, Ubernostrum.