migration for file-based currency setting

InvenTree/common/migrations/0010_migrate_currency_setting.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.2.4 on 2021-07-01 15:39
+
+from django.db import migrations
+from common.models import InvenTreeSetting
+from InvenTree.settings import get_setting, CONFIG
+
+def set_default_currency(apps, schema_editor):
+    """ migrate the currency setting from config.yml to db """
+    # get value from settings-file
+    base_currency = get_setting('INVENTREE_BASE_CURRENCY', CONFIG.get('base_currency', 'USD'))
+    # write to database
+    InvenTreeSetting.set_setting('INVENTREE_DEFAULT_CURRENCY', base_currency, None, create=True)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('common', '0009_delete_currency'),
+    ]
+
+    operations = [
+        migrations.RunPython(set_default_currency),
+    ]