Nice extensions for django
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,
- getting all pks first in chunks,
- dump them in an order that enables correct loading.
# show model graph parts that would be dumped and those which not: # example for query model a1.A with relation to child a1.B(A) ./manage.py dump_graph -p -q a -r a.b a1-a: a1-a.b to child a1-b.pk excludes: a1-a.f to foreign a1-f.a a1-b: a1-b.pk to parent a1-a.pk excludes: a1-b.c to child a1-c.pk a1-b.e to child a1-e.pk # dump all objects from a1.models.A.objects.filter() with relation a.b as compact yaml: ./manage.py dump_graph -f dump.yaml -s compact_yaml -q a.filter(pk__in=(1,2)) -r a.b - a1-a: [pk] -  -  - a1-b: [pk] -  # load back the dumped dump.yaml ./manage.py load_graph -f dump.yaml -s compact_yaml # by default serializing into compact csv files is enabled: mkdir dump_folder ./manage.py dump_graph -f dump_folder -q a.filter(pk__in=(1,2)) -r a.b #results in two files under dump_folder: # a1-a.csv: a1-a:pk 1 2 # and a1-b.csv: a1-b:pk 2
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