Running example "invoke app.run" fails with "Type Error:Tasks must have an initial Context argument"

[ilaif]

Hey,

Sounds like a great project. However I'm trying to run it on my local machine (OSX El-Capitan, Python 2.7.10) and I receive an error:

>> invoke app.run
2016-11-18 12:15:27,067 [WARNING] [tasks.app.db] Alembic cannot be imported, so some app.db.* tasks won't be available!
Traceback (most recent call last):
  File "/usr/local/bin/invoke", line 11, in <module>
    sys.exit(program.run())
  File "/usr/local/lib/python2.7/site-packages/invoke/program.py", line 269, in run
    self._parse(argv)
  File "/usr/local/lib/python2.7/site-packages/invoke/program.py", line 325, in _parse
    self.load_collection()
  File "/usr/local/lib/python2.7/site-packages/invoke/program.py", line 473, in load_collection
    coll = loader.load(coll_name) if coll_name else loader.load()
  File "/usr/local/lib/python2.7/site-packages/invoke/loader.py", line 53, in load
    module = imp.load_module(name, fd, path, desc)
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/__init__.py", line 61, in <module>
    from . import app
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/__init__.py", line 8, in <module>
    from . import dependencies, env, db, run, users
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/db.py", line 272, in <module>
    def init_development_data(context, upgrade_db=True, skip_on_failure=False):
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/_utils.py", line 58, in app_context_task
    return Task(wrapper, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/invoke/tasks.py", line 58, in __init__
    self.positional = self.fill_implicit_positionals(positional)
  File "/usr/local/lib/python2.7/site-packages/invoke/tasks.py", line 149, in fill_implicit_positionals
    args, spec_dict = self.argspec(self.body)
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/_utils.py", line 21, in argspec
    return super(Task, self).argspec(body)
  File "/usr/local/lib/python2.7/site-packages/invoke/tasks.py", line 144, in argspec
    raise TypeError("Tasks must have an initial Context argument!")
TypeError: Tasks must have an initial Context argument!

I must be missing something very trivial, I event tried to manually pip install the requirements to make sure I have all the dependencies.

Thanks,
Ilai.

[frol]

It seems like you are using Invoke <0.13. Either update it or wait a couple of hours while I backport all new features and fixes back to this example project.

[ilaif]

Thanks! However:

 » pip show invoke
Name: invoke
Version: 0.13.0
Summary: Pythonic task execution
Home-page: http://docs.pyinvoke.org
Author: Jeff Forcier
Author-email: jeff@bitprophet.org
License: BSD
Location: /usr/local/lib/python2.7/site-packages
Requires: 

[frol]

Maybe it is the other way around... Try downgrading it to <0.13.

[ilaif]

Thanks, I've downgraded and upgraded pip and now it's no longer an issue.

Now I'm having a problem with migrations:

2016-11-18 17:10:47,940 [INFO] [tasks.app.dependencies] Swagger UI is installed.
/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.babel is deprecated, use flask_babel instead.
  .format(x=modname), ExtDeprecationWarning
Traceback (most recent call last):
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/bin/inv", line 11, in <module>
    sys.exit(program.run())
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/program.py", line 270, in run
    self.execute()
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/program.py", line 379, in execute
    executor.execute(*self.tasks)
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/executor.py", line 114, in execute
    result = call.task(*args, **call.kwargs)
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/tasks.py", line 113, in __call__
    result = self.body(*args, **kwargs)
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/run.py", line 37, in run
    context.invoke_execute(context, 'app.db.upgrade', app=app)
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/__init__.py", line 72, in invoke_execute
    results = Executor(namespace, config=context.config).execute((command_name, kwargs))
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/executor.py", line 114, in execute
    result = call.task(*args, **call.kwargs)
  File "/Users/ilaif/.virtualenvs/flask_restplus_example/lib/python2.7/site-packages/invoke/tasks.py", line 113, in __call__
    result = self.body(*args, **kwargs)
  File "/Users/ilaif/Desktop/flask-restplus-server-example/tasks/app/_utils.py", line 56, in wrapper
    return func(*args, **kwargs)
TypeError: upgrade() takes at least 1 argument (0 given)

Really appreciating your help, I think I'm close :)

[frol]

Please, try the latest master. Both invoke 0.12 and 0.13 should work.