Environment().init_app(app) throws RuntimeError

[Lemi Boyce]

assets_env = Environment()
assets_env.init_app(app)

assets_env.load_path = [paths] throws:

Traceback (most recent call last):
  File "run.py", line 1, in <module>
    from app import app
  File "/Users/lemuel.boyce/Documents/Projects/someapp/app/__init__.py", line 90, in <module>
    os.path.join(app.config['BASE_DIRECTORY'], 'app/static/coffee')
  File "/Users/lemuel.boyce/pyvenv/lib/python2.7/site-packages/webassets/env.py", line 657, in _set_load_path
    self._storage['load_path'] = load_path
  File "/Users/lemuel.boyce/pyvenv/lib/python2.7/site-packages/flask_assets.py", line 112, in __setitem__
    self.env._app.config[self._transform_key(key)] = value
  File "/Users/lemuel.boyce/pyvenv/lib/python2.7/site-packages/flask_assets.py", line 330, in _app
    'and no application in current context')
RuntimeError: assets instance not bound to an application, and no application in current context

while assets_env = Environment(app) works just fine

[Michael]

That's working as expected.

If you use the init_app() syntax, you need to have a Flask application on the stack; the purpose of this approach is that it should work with more than one app. Otherwise, if you do:

 assets_env.load_path = [paths]

it doesn't know which app config to modify.