Old template causes TypeError: 'Milestone' object does not support indexing

[anonymous]

My Trac .egg file contained two templates:

• admin/templates/admin_milestones.html​ and
• ticket/templates/admin_milestones.html​

because both were still in build/lib/ from earlier builds.

This lead to a TypeError: 'Milestone' object does not support indexing (names ('milestone', 'ticket_count')) while doing a GET operation on /admin/ticket/milestones:

File "build/bdist.win32/egg/trac/web/main.py", line 543, in _dispatch_request
    dispatcher.dispatch(req)
File "build/bdist.win32/egg/trac/web/main.py", line 243, in dispatch
    method=method)
File "build/bdist.win32/egg/trac/web/chrome.py", line 1067, in render_template
    encoding='utf-8')
File "build/bdist.win32/egg/genshi/core.py", line 183, in render
    return encode(generator, method=method, encoding=encoding, out=out)
File "build/bdist.win32/egg/genshi/output.py", line 58, in encode
    for chunk in iterator:
File "build/bdist.win32/egg/genshi/output.py", line 339, in __call__
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/output.py", line 826, in __call__
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/output.py", line 670, in __call__
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/output.py", line 771, in __call__
    for kind, data, pos in chain(stream, [(None, None, None)]):
File "build/bdist.win32/egg/genshi/output.py", line 586, in __call__
    for ev in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/trac/web/chrome.py", line 1215, in _strip_accesskeys
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/trac/web/chrome.py", line 1204, in _generate
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
File "build/bdist.win32/egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
File "build/bdist.win32/egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
File "build/bdist.win32/egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
File "build/bdist.win32/egg/genshi/template/markup.py", line 327, in _match
    for event in stream:
File "build/bdist.win32/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/genshi/path.py", line 588, in _generate
    subevent = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
File "build/bdist.win32/egg/genshi/template/markup.py", line 316, in _strip
    event = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/genshi/path.py", line 588, in _generate
    subevent = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
File "build/bdist.win32/egg/genshi/template/markup.py", line 316, in _strip
    event = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
File "build/bdist.win32/egg/genshi/path.py", line 588, in _generate
    subevent = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
File "build/bdist.win32/egg/genshi/template/markup.py", line 316, in _strip
    event = next()
File "build/bdist.win32/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
File "build/bdist.win32/egg/genshi/template/directives.py", line 367, in __call__
    assign(scope, item)
File "build/bdist.win32/egg/genshi/template/directives.py", line 130, in _assign
    _assign(data, value[idx], names[idx])

Deleting the build folder and rebuilding the egg fixed the problem, so you might not consider this a defect per se; feel free to close this ticket. I just wanted to report it in case someone else has the same issue.

[Jun Omae]

Yeah, I think that is an InstallationIssue and not a defect. I consider that we should remove build directory before building source files, e.g. using setup.py clean --all, if the source files are changed.