PageOutline macro breaks on pages using the graphviz plugin

[rcastellucci@…]

If I use the PageOutline macro on a page that is using the graphviz plugin, I get the following error:

Error: Macro PageOutline(None) failed

'NoneType' object has no attribute 'args'

[Emmanuel Blot]

I can confirm it also occurs with the trunk version [2944].

[Christopher Lenz]

Anything related in the logs (for example, a traceback)?

[rcastellucci]

16:18:59 Trac[formatter] DEBUG: Executing Wiki macro PageOutline by provider <trac.wiki.macros.PageOutlin
eMacro object at 0x4113acac>
16:18:59 Trac[formatter] DEBUG: Executing Wiki macro graphviz by provider <graphviz.graphviz.GraphvizMacr
o object at 0x4113abac>
16:18:59 Trac[graphviz] DEBUG: dir(req): ['__class__', '__delattr__', '__doc__', '__getattribute__', '__h
ash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__']
16:18:59 Trac[formatter] ERROR: Macro PageOutline(None) failed
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 369, in _macro_formatter
    return macro.process(self.req, args, 1)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 108, in process
    text = self.processor(req, text)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 98, in _macro_processor
    return macro_provider.render_macro(req, self.name, text)
  File "/usr/lib/python2.3/site-packages/trac/wiki/macros.py", line 189, in render_macro
    max_depth=max_depth, min_depth=min_depth))
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 756, in wiki_to_outline
    min_depth)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 711, in format
    Formatter.format(self, text, NullOut())
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 576, in format
    self.handle_code_block(line)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 546, in handle_code_block
    self.out.write(self.code_processor.process(self.req, self.code_text))
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 108, in process
    text = self.processor(req, text)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 98, in _macro_processor
    return macro_provider.render_macro(req, self.name, text)
  File "build/bdist.linux-i686/egg/graphviz/graphviz.py", line 91, in render_macro
AttributeError: 'NoneType' object has no attribute 'args'

[anonymous]

See also ​http://trac-hacks.org/ticket/193

[Emmanuel Blot]

Temporary workaround

[Emmanuel Blot]

I've attached a workaround patch:

• discards debug traces that access the null req object
• discards the assignation of self.base_url which not used anyway.

However, the root cause is not fixed: why req becomes None when both macros are used ?

[Emmanuel Blot]

Ok, I think I got it:

macro renders wiki content, so when it encounters another macro, it attempts to render it, but does not forward the request object to the nested macro.

I'm closing this ticket, and re-opening a new ticket about this nested macro issue.

Closing has fixed (ticket number to come), as the workaround allows to make it work, and the cause is not related to the graphviz macro, but the way it is called.

[anonymous]

asdfasdasd

[Emmanuel Blot]

See #2916.