Provide sufficient context to check 'delete' permission in AjaxEditRelationCtxComponent
Call rdef.check only when both fromeid and toeid are available. Though only
call it once (for the first encountered related entity).
Factorize a bit to keep handling of CSS/JS addition the same.
Closes #3670209.
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)