Allow currency list to be specified from environment variables (#4343)

- Add option to get_setting in config.py to allow list casting

InvenTree/InvenTree/config.py

@@ -13,6 +13,25 @@ CONFIG_DATA = None
 CONFIG_LOOKUPS = {}
 
 
+def to_list(value, delimiter=','):
+    """Take a configuration setting and make sure it is a list.
+
+    For example, we might have a configuration setting taken from the .config file,
+    which is already a list.
+
+    However, the same setting may be specified via an environment variable,
+    using a comma delimited string!
+    """
+
+    if type(value) in [list, tuple]:
+        return value
+
+    # Otherwise, force string value
+    value = str(value)
+
+    return [x.strip() for x in value.split(delimiter)]
+
+
 def is_true(x):
     """Shortcut function to determine if a value "looks" like a boolean"""
     return str(x).strip().lower() in ['1', 'y', 'yes', 't', 'true', 'on']
@@ -101,7 +120,12 @@ def get_setting(env_var=None, config_key=None, default_value=None, typecast=None
     """
     def try_typecasting(value, source: str):
         """Attempt to typecast the value"""
-        if typecast is not None:
+
+        # Force 'list' of strings
+        if typecast is list:
+            value = to_list(value)
+
+        elif typecast is not None:
             # Try to typecast the value
             try:
                 val = typecast(value)
@@ -109,6 +133,7 @@ def get_setting(env_var=None, config_key=None, default_value=None, typecast=None
                 return val
             except Exception as error:
                 logger.error(f"Failed to typecast '{env_var}' with value '{value}' to type '{typecast}' with error {error}")
+
         set_metadata(source)
         return value
 

InvenTree/InvenTree/settings.py

@@ -103,7 +103,8 @@ MEDIA_ROOT = config.get_media_dir()
 # List of allowed hosts (default = allow all)
 ALLOWED_HOSTS = get_setting(
     config_key='allowed_hosts',
-    default_value=['*']
+    default_value=['*'],
+    typecast=list,
 )
 
 # Cross Origin Resource Sharing (CORS) options
@@ -119,7 +120,8 @@ CORS_ORIGIN_ALLOW_ALL = get_boolean_setting(
 
 CORS_ORIGIN_WHITELIST = get_setting(
     config_key='cors.whitelist',
-    default_value=[]
+    default_value=[],
+    typecast=list,
 )
 
 # Needed for the parts importer, directly impacts the maximum parts that can be uploaded
@@ -736,9 +738,11 @@ if get_boolean_setting('TEST_TRANSLATIONS', default_value=False):  # pragma: no
     django.conf.locale.LANG_INFO = LANG_INFO
 
 # Currencies available for use
-CURRENCIES = get_setting('INVENTREE_CURRENCIES', 'currencies', [
-    'AUD', 'CAD', 'CNY', 'EUR', 'GBP', 'JPY', 'NZD', 'USD',
-])
+CURRENCIES = get_setting(
+    'INVENTREE_CURRENCIES', 'currencies',
+    ['AUD', 'CAD', 'CNY', 'EUR', 'GBP', 'JPY', 'NZD', 'USD'],
+    typecast=list,
+)
 
 # Maximum number of decimal places for currency rendering
 CURRENCY_DECIMAL_PLACES = 6
@@ -746,7 +750,7 @@ CURRENCY_DECIMAL_PLACES = 6
 # Check that each provided currency is supported
 for currency in CURRENCIES:
     if currency not in moneyed.CURRENCIES:  # pragma: no cover
-        print(f"Currency code '{currency}' is not supported")
+        logger.error(f"Currency code '{currency}' is not supported")
         sys.exit(1)
 
 # Custom currency exchange backend
@@ -795,7 +799,7 @@ IMPORT_EXPORT_USE_TRANSACTIONS = True
 SITE_ID = 1
 
 # Load the allauth social backends
-SOCIAL_BACKENDS = get_setting('INVENTREE_SOCIAL_BACKENDS', 'social_backends', [])
+SOCIAL_BACKENDS = get_setting('INVENTREE_SOCIAL_BACKENDS', 'social_backends', [], typecast=list)
 
 for app in SOCIAL_BACKENDS:
     INSTALLED_APPS.append(app)  # pragma: no cover