nicedjango 1.1.0

Extensions for Django

nicedjango

Nice django tools

ModelGraph

Selective dumping and loading of only the needed model data for all objects and their related objects of one or more querysets.

This is done by

• getting a graph of all relations between models,

• than getting all pks first chunked in steps of 10k

• and than dump them in an order that enables correct loading.

For now the serialization is handled by django’s yaml decoder to enable queries in chunks for big data.

Examples

# show model graph parts that would be dumped and those which not:
./manage.py dump_graph -s -q 'a'
 a1.a:
   ignored subs:
     a1.a.b > a1.b

# add relations to the to be dumped graph
./manage.py dump_graph -s -q 'a' -e 'a.b'
  a1.a:
    subs:
      a1.a.b > a1.b
  a1.b:
    parents:
      a1.b.a_ptr > a1.a
    ignored subs:
      a1.b.c > a1.c

# dump all objects from myapp.models.MyModel.objects.filter(..)
./manage.py dump_graph -d dump.yaml -q 'myapp.mymodel.filter(..)'

# load dump.yaml
./manage.py load_graph dump.yaml