Disable type field update on pdu if there is connectoins

app/models/power_distribution_unit.rb

@@ -25,6 +25,8 @@ class PowerDistributionUnit < ApplicationRecord
   validates :serial_number, presence: true, uniqueness: true, format: { without: /\s/ }
   validates :ipmi_url, format: URI::DEFAULT_PARSER.make_regexp(%w[http https]), allow_blank: true
 
+  validate :type_cannot_change_if_connections_present
+
   accepts_nested_attributes_for :circuits, allow_destroy: true
 
   delegate :to_s, to: :name
@@ -43,8 +45,19 @@ def deep_dup
     end
   end
 
+  # TODO: remove me when connections are implemented
+  def connections
+    []
+  end
+
   private
 
+  def type_cannot_change_if_connections_present
+    return unless connections.present? && will_save_change_to_type?
+
+    errors.add(:type, :cannot_change_if_connections_present)
+  end
+
   def slug_candidates
     [
       :name,

app/views/power_distribution_units/_form.html.erb

@@ -27,7 +27,8 @@
                        PowerDistributionUnitDecorator.power_distribution_unit_types_options_for_select,
                        { prompt: true },
                        class: "form-select",
-                       data: { controller: "select" } %>
+                       data: { controller: "select" },
+                       disabled: f.object.connections.present? %>
         </fieldset>
       <% end %>
 

config/locales/activerecord.en.yml

@@ -303,6 +303,11 @@ en:
             domain_ids:
               blank: can't be blank, or "All domains" must be checked
 
+        power_distribution_unit:
+          attributes:
+            type:
+              cannot_change_if_connections_present: cannot bed changed if there is connections
+
   # Common attributes
   attributes:
     bay_id: Bay

config/locales/activerecord.fr.yml

@@ -540,6 +540,11 @@ fr:
             domain_ids:
               blank: doit être rempli, ou "Tous les domaines" doit être coché
 
+        power_distribution_unit:
+          attributes:
+            type:
+              cannot_change_if_connections_present: ne peut pas être changé s'il y a des connections
+
   # Common attributes
   attributes:
     bay_id: Baie