Closed
Description
When I try to construct a datastore client on a box that has the datastore emulator enabled and running, I get the following:
File ".../model/datastore.py", line 6, in <module>
client = datastore.Client()
File ".../lib/python3.6/site-packages/google/cloud/datastore/client.py", line 205, in __init__
project=project, credentials=credentials, _http=_http)
File ".../lib/python3.6/site-packages/google/cloud/client.py", line 215, in __init__
_ClientProjectMixin.__init__(self, project=project)
File ".../lib/python3.6/site-packages/google/cloud/client.py", line 169, in __init__
project = self._determine_default(project)
File ".../lib/python3.6/site-packages/google/cloud/datastore/client.py", line 222, in _determine_default
return _determine_default_project(project)
File ".../lib/python3.6/site-packages/google/cloud/datastore/client.py", line 75, in _determine_default_project
project = _base_default_project(project=project)
File ".../lib/python3.6/site-packages/google/cloud/_helpers.py", line 179, in _determine_default_project
_, project = google.auth.default()
File ".../lib/python3.6/site-packages/google/auth/_default.py", line 283, in default
raise exceptions.DefaultCredentialsError(_HELP_MESSAGE)
google.auth.exceptions.DefaultCredentialsError: Could not automatically determine credentials. Please set GOOGLE_APPLICATION_CREDENTIALS or
explicitly create credential and re-run the application. For more
However, it's clear that these credentials are not actually required because when I initialize my client as follows, it works in both dev and production:
if os.environ.get(environment_vars.GCD_HOST):
# avoid a bug in the google client - it tries to authenticate even when the emulator is enabled
client = datastore.Client(_http=requests.Session)
else:
client = datastore.Client()
With that change, the library works fine for me, but this seems like something the library ought to be able to detect and handle by default to save devs a lot of time.
In case they're relevant:
- OS type and version
$ uname -a
Darwin Rileys-MacBook-Pro.local 17.7.0 Darwin Kernel Version 17.7.0: Thu Jun 21 22:53:14 PDT 2018; root:xnu-4570.71.2~1/RELEASE_X86_64 x86_64
- Python version and virtual environment information
python --version
$ python --version
Python 3.6.5
- google-cloud-python version
pip show google-cloud,pip show google-<service>orpip freeze
$ pip show google-cloud-datastore
Name: google-cloud-datastore
Version: 1.7.0