lostplaces-backend/django_lostplaces/docs/developer.md

django lostplaces documentation for developer

Greetings, this documentation is for anyone who wants to work with this projects codebase or is just curious about our project.

Models

The models contain an custom user profile, some abstract base models and the models holding the actual data for this project

Explorer user profile

The class lostplaces.models.Explorer is our custom user profile. It has an ForeignKey pointing at django's default user model instead of providing an entire custom user model. That way this django app does not conflict with any other app that has to bring it's own user model.

You can access the explorer profile by accessing the 'explorer' attribute of any user instance

user.explorer

Currently the explorer profile is used by the abstract model 'Submittable' and thus referenced by 'Place' and 'PlaceImage'. The explorer profile therefore has two attributes

user.explorer.places
user.explorer.placeimages

places
A list containing all (lost) places the user has submitted
placeimages
A list containing all images relating a place that a user has submitted

Taggable

The abstract model Taggable represents an model that is taggable. It depends on the django app taggit. It only consists of one field:
tag
TaggableManager, allows the sub class to be tagged, blank=True allows the admin form to be submitted without any tags

Mapable

The abstract model Mapable represents an model that can be displayed on a map. It consists of tree members
name
Name of the object, displayed on the map, max length 50 characters
latitude
Latitude of the referenced location, -90 <= value <= 90
longitude
Longitude of the referenced location -180 <= value <= 180
A mapable model has to provide its own get_absolute_url, in order to provide a link when clicked.

Submittable

The abstract model Submittable represents an model that can be submitted by an user. It knows who submitted something and when:
submitted_by
Referencing the explorer profile, see Explorer. If the explorer profile is deleted, this instance is kept (on_delete=models.SET_NULL). The related_name is set to the class name, lower case appending an s (%(class)ss)
submitted_when
When the object was submitted, automatically set by django (auto_now_add=True)

Voucher

A voucher code is needed to sign up using lostplaces sign up form. The model contains
code
The voucher code, max length 30 characters created_when
When the voucher was created automatically set by django (auto_now_add=True)
expires_when
Till what date the voucher remains valid

Place

The place model is the heart of this project. It stores all information about a place needed.
location
Human readable location description (town, village, street), max length 50 characters
description
Describing the place in detail
The place model uses these abstract super classes

• Submittable, see Submittable for additional fields
• Taggable, see Taggable for additional fields
• Mapable, see Mapable for additional fields The average_latlon function takes a list of places and returns the center point of all these places