misc/scripts/detect_cycle.py
author Julien Cristau <julien.cristau@logilab.fr>
Mon, 14 Dec 2015 14:54:23 +0100
changeset 10986 ca8321b32392
parent 6198 f8dea560703f
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[dataimport] separate entities table from other metadata in SQLGenObjectStore 'entities' needs to be updated first as every other table has references to its rows. Remove use of thread-local storage in the process. related to #9177565.


try:
    rtype, = __args__
except ValueError:
    print 'USAGE: cubicweb-ctl shell <instance> detect_cycle.py -- <relation type>'
    print

graph = {}
for fromeid, toeid in rql('Any X,Y WHERE X %s Y' % rtype):
    graph.setdefault(fromeid, []).append(toeid)

from logilab.common.graph import get_cycles

for cycle in get_cycles(graph):
    print 'cycle', '->'.join(str(n) for n in cycle)