bug fix

Looks like we cannot import app models
in settings because during code initialization
the settings runs before the apps are loaded
which throws error.

physionet-django/physionet/settings/base.py

@@ -17,7 +17,6 @@
 
 from decouple import config, UndefinedValueError
 
-from project.models import DataSource
 
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
@@ -615,5 +614,5 @@ class StorageTypes:
 # minimum number of word needed for research_summary field for Credentialing Model.
 MIN_WORDS_RESEARCH_SUMMARY_CREDENTIALING = config('MIN_WORDS_RESEARCH_SUMMARY_CREDENTIALING', cast=int, default=20)
 
-DEFAULT_PROJECT_DATA_LOCATION = config('DEFAULT_PROJECT_DATA_LOCATION', default=DataSource.DataLocation.DIRECT)
+DEFAULT_PROJECT_DATA_LOCATION = config('DEFAULT_PROJECT_DATA_LOCATION', default='DI')
 DEFAULT_PROJECT_ACCESS_MECHANISM = config('DEFAULT_PROJECT_ACCESS_MECHANISM', default=None)