Make EditController edit_entity method always return an eid
In cases the entity was to be created or copied, eid was None hence the method
returned None despite the dosctring says the method should always return an
eid. Now if the eid variable is None, it is assigned to the newly created
entity eid.
Closes #3593029.
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)