Prepare to block billing entity editing

ref #198

src/servala/core/admin.py

@@ -66,8 +66,22 @@ class OrganizationAdmin(admin.ModelAdmin):
     def get_readonly_fields(self, request, obj=None):
         readonly_fields = list(super().get_readonly_fields(request, obj) or [])
         readonly_fields.append("namespace")  # Always read-only
+
+        if obj and obj.has_inherited_billing_entity:
+            readonly_fields.append("billing_entity")
+
         return readonly_fields
 
+    def get_form(self, request, obj=None, **kwargs):
+        form = super().get_form(request, obj, **kwargs)
+
+        if obj and obj.has_inherited_billing_entity:
+            form.base_fields["billing_entity"].help_text = _(
+                "This billing entity is inherited from the organization's origin and cannot be modified."
+            )
+
+        return form
+
 
 @admin.register(BillingEntity)
 class BillingEntityAdmin(admin.ModelAdmin):
@@ -77,8 +91,9 @@ class BillingEntityAdmin(admin.ModelAdmin):
 
 @admin.register(OrganizationOrigin)
 class OrganizationOriginAdmin(admin.ModelAdmin):
-    list_display = ("name",)
+    list_display = ("name", "billing_entity")
     search_fields = ("name",)
+    autocomplete_fields = ("billing_entity",)
 
 
 @admin.register(OrganizationMembership)

src/servala/core/models/organization.py

@@ -89,6 +89,10 @@ class Organization(ServalaModelMixin, models.Model):
     def get_absolute_url(self):
         return self.urls.base
 
+    @property
+    def has_inherited_billing_entity(self):
+        return self.origin and self.billing_entity == self.origin.billing_entity
+
     def set_owner(self, user):
         with scopes_disabled():
             OrganizationMembership.objects.filter(user=user, organization=self).delete()

src/servala/frontend/forms/organization.py

@@ -8,6 +8,10 @@ from servala.frontend.forms.mixins import HtmxMixin
 
 
 class OrganizationForm(HtmxMixin, ModelForm):
+    # def __init__(self, *args, **kwargs):
+    # super().__init__(*args, **kwargs)
+    # if self.instance and self.instance.has_inherited_billing_entity:
+    # TODO disable billing entity editing
     class Meta:
         model = Organization
         fields = ("name",)
@@ -46,7 +50,7 @@ class OrganizationCreateForm(OrganizationForm):
 
     def __init__(self, *args, user=None, **kwargs):
         super().__init__(*args, **kwargs)
-
+        self.user = user
         if not self.initial.get("invoice_country"):
             default_country_name = "Switzerland"
             country_choices = self.fields["invoice_country"].choices
@@ -55,7 +59,6 @@ class OrganizationCreateForm(OrganizationForm):
                     self.initial["invoice_country"] = country_id
                     break
 
-        self.user = user
         self.odoo_addresses = get_invoice_addresses(self.user)
 
         if self.odoo_addresses:

src/servala/frontend/templates/frontend/organizations/update.html

@@ -69,6 +69,11 @@
             <div class="card">
                 <div class="card-header">
                     <h4 class="card-title">{% translate "Billing Address" %}</h4>
+                    {% if form.instance.has_inherited_billing_entity %}
+                        <p class="text-muted">
+                            <small>{% translate "This billing address cannot be modified." %}</small>
+                        </p>
+                    {% endif %}
                 </div>
                 <div class="card-content">
                     <div class="card-body">