Ensure schema generation is more stable (#7562)

* Enable passing of enviroment variables

* keep server url static
see #6882 (3)

* keep plugin api out of schema
see #6882 (1)

* Add kwarg to override db settings

* keep currencies stable for schema generation
see #6882 (2)

* use str instead of bool

* add version bump

src/backend/InvenTree/InvenTree/api_version.py

@@ -1,11 +1,14 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 211
+INVENTREE_API_VERSION = 212
 
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
+v212 - 2024-07-06 : https://github.com/inventree/InvenTree/pull/7562
+    - Makes API generation more robust (no functional changes)
+
 v211 - 2024-06-26 : https://github.com/inventree/InvenTree/pull/6911
     - Adds API endpoints for managing data import and export
 

src/backend/InvenTree/common/currency.py

@@ -59,7 +59,9 @@ def currency_codes() -> list:
     """Returns the current currency codes."""
     from common.settings import get_global_setting
 
-    codes = get_global_setting('CURRENCY_CODES', create=False).strip()
+    codes = get_global_setting(
+        'CURRENCY_CODES', create=False, enviroment_key='INVENTREE_CURRENCY_CODES'
+    ).strip()
 
     if not codes:
         codes = currency_codes_default_list()

src/backend/InvenTree/common/settings.py

@@ -1,10 +1,17 @@
 """User-configurable settings for the common app."""
 
+from os import environ
 
-def get_global_setting(key, backup_value=None, **kwargs):
+
+def get_global_setting(key, backup_value=None, enviroment_key=None, **kwargs):
     """Return the value of a global setting using the provided key."""
     from common.models import InvenTreeSetting
 
+    if enviroment_key:
+        value = environ.get(enviroment_key)
+        if value:
+            return value
+
     if backup_value is not None:
         kwargs['backup_value'] = backup_value