Add 'InstanceName' setting

- Will be auto-generated if it does not already exist

InvenTree/common/apps.py

@@ -2,7 +2,7 @@ from django.apps import AppConfig
 from django.db.utils import OperationalError, ProgrammingError
 
 import os
-
+import uuid
 import yaml
 
 
@@ -10,14 +10,19 @@ class CommonConfig(AppConfig):
     name = 'common'
 
     def ready(self):
+
         """ Will be called when the Common app is first loaded """
         self.populate_default_settings()
+        self.add_instance_name()
 
     def populate_default_settings(self):
         """ Populate the default values for InvenTree key:value pairs.
         If a setting does not exist, it will be created.
         """
 
+        # Import this here, rather than at the global-level,
+        # otherwise it is called all the time, and we don't want that,
+        # as the InvenTreeSetting model may have not been instantiated yet.
         from .models import InvenTreeSetting
 
         here = os.path.dirname(os.path.abspath(__file__))
@@ -46,3 +51,26 @@ class CommonConfig(AppConfig):
             except (OperationalError, ProgrammingError):
                 # Migrations have not yet been applied - table does not exist
                 break
+
+    def add_instance_name(self):
+        """
+        Check if an InstanceName has been defined for this database.
+        If not, create a random one!
+        """
+
+        # See note above
+        from .models import InvenTreeSetting
+
+        if not InvenTreeSetting.objects.filter(key='InstanceName').exists():
+
+            val = uuid.uuid4().hex
+
+            print("No 'InstanceName' found - generating random name '{n}'".format(n=val))
+
+            name = InvenTreeSetting(
+                key="InstanceName",
+                value=val,
+                description="Instance name for this InvenTree database installation."
+            )
+
+            name.save()

InvenTree/common/kvp.yaml

@@ -4,6 +4,9 @@
 # Note: The description strings provided here will be translatable,
 #       so ensure that any translations are provided as appropriate.
 
+# TODO: Update the formatting here to include logical separators e.g. double-underscore
+# TODO: This is so when there are enough options, we will be able to display them as a tree 
+
 - key: 'part_ipn_regex'
   default: ''
   description: 'Format string for internal part number'