Generate default settings for all InvenTreeSetting object

InvenTree/common/apps.py

@@ -9,6 +9,7 @@ class CommonConfig(AppConfig):
 
         """ Will be called when the Common app is first loaded """
         self.add_instance_name()
+        self.add_default_settings()
 
     def add_instance_name(self):
         """
@@ -19,15 +20,70 @@ class CommonConfig(AppConfig):
         # See note above
         from .models import InvenTreeSetting
 
+        """
+        Note: The "old" instance name was stored under the key 'InstanceName',
+        but has now been renamed to 'INVENTREE_INSTANCE'.
+        """
+
         try:
-            if not InvenTreeSetting.objects.filter(key='InstanceName').exists():
 
-                name = InvenTreeSetting(
-                    key="InstanceName",
-                    value="InvenTree Server"
-                )
+            # Quick exit if a value already exists for 'inventree_instance'
+            if InvenTreeSetting.objects.filter(key='INVENTREE_INSTANCE').exists():
+                return
+
+            # Default instance name
+            instance_name = 'InvenTree Server'
+
+            # Use the old name if it exists
+            if InvenTreeSetting.objects.filter(key='InstanceName').exists():
+                instance = InvenTreeSetting.objects.get(key='InstanceName')
+                instance_name = instance.value
+
+            # Create new value
+            InvenTreeSetting.objects.create(
+                key='INVENTREE_INSTANCE',
+                value=instance_name
+            )
 
-                name.save()
         except (OperationalError, ProgrammingError):
             # Migrations have not yet been applied - table does not exist
             pass
+
+    def add_default_settings(self):
+        """
+        Create all required settings, if they do not exist.
+        """
+
+        from .models import InvenTreeSetting
+
+        for key in InvenTreeSetting.DEFAULT_VALUES.keys():
+            try:
+                settings = InvenTreeSetting.objects.filter(key__iexact=key)
+
+                if settings.count() == 0:
+                    value = InvenTreeSetting.DEFAULT_VALUES[key]
+
+                    print(f"Creating default setting for {key} -> '{value}'")
+
+                    InvenTreeSetting.objects.create(
+                        key=key,
+                        value=value
+                    )
+
+                    return
+
+                elif settings.count() > 1:
+                    # Prevent multiple shadow copies of the same setting!
+                    for setting in settings[1:]:
+                        setting.delete()
+
+                # Ensure that the key has the correct case
+                setting = settings[0]
+
+                if not setting.key == key:
+                    setting.key = key
+                    setting.save()
+
+            except (OperationalError, ProgrammingError):
+                # Table might not yet exist
+                pass

InvenTree/common/forms.py

@@ -7,7 +7,7 @@ from __future__ import unicode_literals
 
 from InvenTree.forms import HelperForm
 
-from .models import Currency
+from .models import Currency, InvenTreeSetting
 
 
 class CurrencyEditForm(HelperForm):
@@ -22,3 +22,17 @@ class CurrencyEditForm(HelperForm):
             'value',
             'base'
         ]
+
+
+class SettingEditForm(HelperForm):
+    """
+    Form for creating / editing a settings object
+    """
+
+    class Meta:
+        model = InvenTreeSetting
+
+        fields = [
+            'key',
+            'value'
+        ]

InvenTree/common/models.py

@@ -27,6 +27,30 @@ class InvenTreeSetting(models.Model):
     even if that key does not exist.
     """
 
+    # Dict of default values for various internal settings
+    DEFAULT_VALUES = {
+        # Global inventree settings
+        'INVENTREE_INSTANCE': 'InvenTree Server',
+
+        # Part settings
+        'PART_IPN_REGEX': '',
+        'PART_COPY_BOM': True,
+        'PART_COPY_PARAMETERS': True,
+        'PART_COPY_TESTS': True,
+
+        # Stock settings
+
+        # Build Order settings
+        'BUILDORDER_REFERENCE_PREFIX': 'BO',
+        'BUILDORDER_REFERENCE_REGEX': '',
+
+        # Purchase Order Settings
+        'PURCHASEORDER_REFERENCE_PREFIX': 'PO',
+
+        # Sales Order Settings
+        'SALESORDER_REFERENCE_PREFIX': 'SO',
+    }
+
     class Meta:
         verbose_name = "InvenTree Setting"
         verbose_name_plural = "InvenTree Settings"
@@ -39,8 +63,12 @@ class InvenTreeSetting(models.Model):
         """
 
         try:
-            setting = InvenTreeSetting.objects.get(key__iexact=key)
-            return setting.value
+            settings = InvenTreeSetting.objects.filter(key__iexact=key)
+
+            if len(settings) > 0:
+                return settings[0].value
+            else:
+                return backup_value
         except InvenTreeSetting.DoesNotExist:
             return backup_value
 

InvenTree/common/views.py

@@ -35,3 +35,14 @@ class CurrencyDelete(AjaxDeleteView):
     model = models.Currency
     ajax_form_title = _('Delete Currency')
     ajax_template_name = "common/delete_currency.html"
+
+
+class SettingEdit(AjaxUpdateView):
+    """
+    View for editing an InvenTree key:value settings object,
+    (or creating it if the key does not already exist)
+    """
+
+    model = models.InvenTreeSetting
+    ajax_form_title = _('Change Setting')
+    form_class = forms.SettingEditForm