[entity,views/json] backout 353bbd17a8b6 (reopens #2559931) Calling .complete() unconditionnally from the json encoder is unsafe since on entity creation validation: * an eid may have been drawn (hence even .has_eid() would not help) while processing form data in the edit controller * a ValidationError may have been raised and the entity-creating transaction rollbacked This leads to a crash on the return path from the validation to the browser, where the json_dumps((status, args, entity)) call will stumble upon the .complete() call which will fail because the entity does not (any more) exist in the database.

     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)