[session] deprecate `hijack_user` method The semantic of this method is wicked and lead to very hard violation of sanity. (multiple transaction using the very same cursors). We deprecated the API to be able to drop it as soon as possible. The method was added long ago for some notification trick. It is not needed since we sent notification on ``postcommit_event``. (closes #2781782)

     1

     2

try:

     3

    rtype, = __args__

     4

except ValueError:

     5

    print 'USAGE: cubicweb-ctl shell <instance> detect_cycle.py -- <relation type>'

     6

    print

     7

     8

graph = {}

     9

for fromeid, toeid in rql('Any X,Y WHERE X %s Y' % rtype):

    10

    graph.setdefault(fromeid, []).append(toeid)

    11

    12

from logilab.common.graph import get_cycles

    13

    14

for cycle in get_cycles(graph):

    15

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