Fix missing child activity log entries when parent relationships are removed

This change fixes a gap in audit visibility when parent-child relationships are
removed from a child record.

Previously, removing a parent relationship through either the direct child record
flow or the bulk import cleanup flow deleted the relationship successfully, but
did not surface a meaningful activity log entry on the child record.

Jira-Issue: MAV-2789

Author: jhenderson

app/components/app_activity_log_component.rb

@@ -57,6 +57,7 @@ def all_events
       gillick_assessment_events,
       note_events,
       notify_events,
+      parent_relationship_events,
       patient_merge_events,
       patient_specific_direction_events,
       pre_screening_events,
@@ -270,6 +271,17 @@ def notify_events
     end
   end
 
+  def parent_relationship_events
+    parent_relationship_audits.map do |audit|
+      {
+        title: "Parent relationship removed",
+        body: audit.comment,
+        at: audit.created_at,
+        by: audit.user
+      }
+    end
+  end
+
   def patient_merge_events
     patient_merge_log_entries.map do |patient_merge_log_entry|
       {
@@ -536,6 +548,16 @@ def notify_log_entries
         end
   end
 
+  def parent_relationship_audits
+    return [] if include_programme_specific_events?
+
+    patient
+      .associated_audits
+      .destroys
+      .where(auditable_type: "ParentRelationship")
+      .includes(:user)
+  end
+
   def patient_locations
     return [] unless include_programme_specific_events?
 

app/jobs/bulk_remove_parent_relationships_job.rb

@@ -45,7 +45,10 @@ def perform(
       CohortImportsParentRelationship.where(
         parent_relationship_id: parent_relationship_ids
       ).delete_all
-      parent_relationships_to_remove.each(&:destroy!)
+
+      Audited
+        .audit_class
+        .as_user(user) { parent_relationships_to_remove.each(&:destroy!) }
 
       Parent
         .where(id: parent_ids_to_check)

app/models/parent_relationship.rb

@@ -52,6 +52,8 @@ class ParentRelationship < ApplicationRecord
   accepts_nested_attributes_for :parent
   validates_associated :parent
 
+  before_destroy :set_removal_audit_comment, prepend: true
+
   def label
     other? ? "Other – #{other_name}" : human_enum_name(:type).capitalize
   end
@@ -71,4 +73,10 @@ def ordinal_label
       "#{index.ordinalize} parent or guardian"
     end
   end
+
+  private
+
+  def set_removal_audit_comment
+    self.audit_comment = "#{label_with_parent} removed from child record"
+  end
 end

spec/components/app_activity_log_component_spec.rb

@@ -810,6 +810,23 @@
                      by: "JOY, Nurse"
   end
 
+  describe "parent relationship removal events" do
+    let(:component) { described_class.new(patient:, team:) }
+
+    before do
+      relationship =
+        patient.parent_relationships.includes(:parent).find_by!(parent: mum)
+
+      Audited.audit_class.as_user(user) { relationship.destroy! }
+    end
+
+    include_examples "card",
+                     title: "Parent relationship removed",
+                     date: "1 January 2026 at 12:00am",
+                     notes: "Jane Doe (mum) removed from child record",
+                     by: "JOY, Nurse"
+  end
+
   describe "decision expiration events" do
     let(:hpv_programme) { Programme.hpv }
     let(:flu_programme) { Programme.flu }

spec/models/parent_relationship_spec.rb

@@ -84,4 +84,35 @@
       it { should eq("Unknown") }
     end
   end
+
+  context "removal is audited" do
+    subject(:destroy!) do
+      Audited.audit_class.as_user(user) { relationship.destroy! }
+    end
+
+    let(:user) { create(:user) }
+    let(:patient) { create(:patient) }
+    let(:parent) { create(:parent, full_name: "Jane Doe") }
+    let!(:relationship) do
+      create(:parent_relationship, :mother, patient:, parent:)
+    end
+
+    it "creates a destroy audit with the patient association and comment" do
+      expect { destroy! }.to change { relationship.audits.destroys.count }.by(1)
+
+      audit =
+        Audited
+          .audit_class
+          .auditable_finder(relationship.id, "ParentRelationship")
+          .destroys
+          .last
+
+      expect(audit).to have_attributes(
+        action: "destroy",
+        associated: patient,
+        user:,
+        comment: "Jane Doe (mum) removed from child record"
+      )
+    end
+  end
 end