[web/views/rdf] Take the second element of XY equivalent for non final relation When given a Yams snippet of the form `<etype> <rtype>` ``xy.xeq()`` will return the XML snippet equivalent to this relation in the form of a tuple `(subject, rtype, object)` so ``item`` will always be a tuple here. In fact, the correct code appears just a few lines above (around line 88) for final relations so I guess this is a copy-paste mistake. Closes #4745929.

     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)