fix financials

app/Models/DiscountUsageModel.php

@@ -16,10 +16,16 @@ class DiscountUsageModel extends Model
         'voucher_id',
         'invoice_id',
         'discount_amount',
+        'requested_discount_cents',
+        'eligible_base_cents',
+        'eligible_base_before_cents',
+        'applied_discount_cents',
+        'application_order',
         'school_year',
         'semester',
         'updated_by',
         'parent_id',
+        'description',
         'used_at'
     ];
    
@@ -50,8 +56,12 @@ class DiscountUsageModel extends Model
     {
         $db = \Config\Database::connect();
 
+        $amountExpression = $db->fieldExists('applied_discount_cents', 'discount_usages')
+            ? 'COALESCE(SUM(du.applied_discount_cents),0) / 100'
+            : 'COALESCE(SUM(du.discount_amount),0)';
+
         $result = $db->table('discount_usages du')
-            ->selectSum('du.discount_amount', 'total_discount')
+            ->select($amountExpression . ' AS total_discount', false)
             ->join('invoices i', 'du.invoice_id = i.id')
             ->where('i.parent_id', $parentId)
             ->where('i.school_year', $schoolYear)
@@ -62,4 +72,3 @@ class DiscountUsageModel extends Model
     }
 
 }
-