Cache manager for Django querysets / serialization

This module takes a Django model, queryset or (app_name, model_name) tuple and generates an 8 character md5 hash of the contents. It caches that hash along with the time the hash was generated using a unique key for each query.

Where a model uses a field with auto_now this field can be used as an alternative to generating the md5 hash, saving a bit of processor thrashing and i/o. You might want to check that you're using a DateTimeField rather than a DateField however or your cache might be unexpectedly stale.

Takes a Django model, queryset or (app_name, model_name) tuple and optional params. If a Fingerprinting instance is provided it's used to generate hashes and detect changes; otherwise a Fingerprint instance is generated on init. This allows different cache backends and even different queries to be used for the fingerprint and cache, which is beneficial when there are costly database calls (one example being geographic processing... mvt tiles perhaps?)

This is a special form of CachedQuerySet which should generate valid GeoJSON features from a model or queryset. Note that the geometry field is expected to be a GeoJSON field not a geometry field.

pre-commit is nice

'''bash pip install pre-commit pre-commit install '''