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Please refer to django-reversion low level API v 1.8

It is valid for lower versions too.

The steps to follow are:

1. delete fields django-pro-history fields from the models, where they are present;
2. register the models from the previous step to django-reversion;
3. create initial revisions for the registered models;
4. use django-pro-history methods instead of django-reversion methods in “base” models API;
5. migrate registred models with South to remove django-pro-history fields from the db;

The final results to check are:

1. it is possible to obtain programmaticly the different versions of an objects;
2. it is possible to obtain programmaticly the different versions of an objects for a certain time interval;
3. the models do not have django-pro-history fields anymore and are registered to django-reversion;
4. django-reversion added to the base requirements;
5. history fields “eradicated” from db;
6. it is possible to install GF including django-reversion;
7. it is possible to upgrade GF with django-reversion through an automatic script.

“history” fields removed from the models:

• gas/models/order.py
  • GASSupplierOrder
  • GASSupplierOrderProduct
  • GASMemberOrder
  • Delivery
  • Withdrawal
• supplier/models.py
  • Supplier
  • SupplierAgent
  • Certification
  • ProductCategory
  • ProductMU
  • ProductPU
  • Product
  • SupplierStock
• base/models.py
  • Person
  • Contact
  • Place
  • DefaultTransition
• gas/models/base.py
  • GAS
  • GASConfig
  • GASActivist
  • GASMember
  • GASSupplierStock
  • GASSupplierSolidalPact

For each of the model in the previous step, add:

import reversion 
.
.
.
class MyModel():
    .
    .
    .
    
if not reversion.is_registered(MyModel):
    reversion.register(MyModel)

Exec:

django-admin.py createinitialrevisions [app[.model]] [-v {0,1,2,3}]

It is possible to use django-reversion to retrieve information from the saved objects versions.

To produce versions from an object updates, django-reversion has to be instructed accordingly.

The easiest way is to register the model to the reversion.middleware.RevisionMiddleware.

NOTE: django-reversion version 1.5.7 does not save the User for the incoming requests into the revision.
If you want to have this facility, please use beFair version based on version 1.5.7 .

From then, it is possible to retrieve versions and info from an object.

import reversion

from app.models import mymodel

obj = mymodel.objects.get(pk=1)

reversion.get_for_object(obj)

import reversion

from app.models import mymodel

obj = mymodel.objects.get(pk=1)

reversion.get_for_object(obj).filter(revision__date_created__gt=datetime.datetime(y, m, d), revision__date_created__lt=datetime.datetime(y1, m1, d1))