bugfix; caught by @jdlcdl

src/seedsigner/models/settings.py

@@ -87,6 +87,12 @@ class Settings(Singleton):
                 values = value
             for v in values:
                 if v not in [opt[0] for opt in settings_entry.selection_options]:
+                    if settings_entry.attr_name == SettingsConstants.SETTING__PERSISTENT_SETTINGS and v == SettingsConstants.OPTION__ENABLED:
+                        # Special case: trying to enable Persistent Settings when 
+                        # DISABLED is the only option allowed (because the SD card is not
+                        # inserted. Explicitly set to DISABLED.
+                        value = SettingsConstants.OPTION__DISABLED
+                        break
                     raise InvalidSettingsQRData(f"""{abbreviated_name} = '{v}' is not valid""")
 
             updated_settings[settings_entry.attr_name] = value

src/seedsigner/views/settings_views.py

@@ -196,13 +196,6 @@ class SettingsIngestSettingsQRView(View):
         # May raise an Exception which will bubble up to the Controller to display to the
         # user.
         self.config_name, settings_update_dict = Settings.parse_settingsqr(data)
-
-        persistent_settings = settings_update_dict.get(SettingsConstants.SETTING__PERSISTENT_SETTINGS)
-        if persistent_settings == SettingsConstants.OPTION__ENABLED and not MicroSD.get_instance().is_inserted:
-            # SettingsQR wants to enable persistent settings, but no MicroSD is inserted.
-            # For the sake of simplicity we just ignore that setting for now.
-            # TODO: Can consider a warning screen instead that gives the user some options.
-            del settings_update_dict[SettingsConstants.SETTING__PERSISTENT_SETTINGS]
             
         self.settings.update(settings_update_dict)
 

tests/test_flows_settings.py

@@ -1,6 +1,8 @@
 import os
 from typing import Callable
 
+from mock import PropertyMock, patch
+
 # Must import test base before the Controller
 from base import FlowTest, FlowStep
 
@@ -116,6 +118,19 @@ class TestSettingsFlows(FlowTest):
         self.mock_microsd.is_inserted = False
         assert MicroSD.get_instance().is_inserted is False
 
+        # Have to jump through some hoops to completely simulate the SD card being
+        # removed; we need Settings to restrict Persistent Settings to only allow
+        # DISABLED.
+        with patch('seedsigner.models.settings.Settings.HOSTNAME', new_callable=PropertyMock) as mock_hostname:
+            # Must identify itself as SeedSigner OS to trigger the SD card removal logic
+            mock_hostname.return_value = Settings.SEEDSIGNER_OS
+            Settings.handle_microsd_state_change(MicroSD.ACTION__REMOVED)
+        
+        selection_options = SettingsDefinition.get_settings_entry(SettingsConstants.SETTING__PERSISTENT_SETTINGS).selection_options
+        assert len(selection_options) == 1
+        assert selection_options[0][0] == SettingsConstants.OPTION__DISABLED
+        assert self.settings.get_value(SettingsConstants.SETTING__PERSISTENT_SETTINGS) == SettingsConstants.OPTION__DISABLED
+
         _run_test(
             initial_setting_state=SettingsConstants.OPTION__DISABLED,
             load_settingsqr_into_decoder=load_persistent_settingsqr_into_decoder,