Remove references to old transformers.

app/Transformers/ExchangeRateTransformer.php

@@ -0,0 +1,69 @@
+<?php
+/*
+ * ExchangeRateTransformer.php
+ * Copyright (c) 2025 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+use FireflyIII\Models\CurrencyExchangeRate;
+use Illuminate\Support\Collection;
+
+class ExchangeRateTransformer extends AbstractTransformer
+{
+    /**
+     * This method collects meta-data for one or all accounts in the transformer's collection.
+     */
+    public function collectMetaData(Collection $objects): Collection
+    {
+        return $objects;
+    }
+
+    /**
+     * Transform the account.
+     */
+    public function transform(CurrencyExchangeRate $rate): array
+    {
+        return [
+            'id'                           => (string) $rate->id,
+            'created_at'                   => $rate->created_at->toAtomString(),
+            'updated_at'                   => $rate->updated_at->toAtomString(),
+
+            'from_currency_id'             => (string) $rate->fromCurrency->id,
+            'from_currency_code'           => $rate->fromCurrency->code,
+            'from_currency_symbol'         => $rate->fromCurrency->symbol,
+            'from_currency_decimal_places' => $rate->fromCurrency->decimal_places,
+
+            'to_currency_id'               => (string) $rate->toCurrency->id,
+            'to_currency_code'             => $rate->toCurrency->code,
+            'to_currency_symbol'           => $rate->toCurrency->symbol,
+            'to_currency_decimal_places'   => $rate->toCurrency->decimal_places,
+
+            'rate'                         => $rate->rate,
+            'date'                         => $rate->date->toAtomString(),
+            'links'                        => [
+                [
+                    'rel' => 'self',
+                    'uri' => sprintf('/exchange-rates/%s', $rate->id),
+                ],
+            ],
+        ];
+    }
+}

app/Transformers/UserGroupTransformer.php

@@ -28,7 +28,7 @@ use FireflyIII\Enums\UserRoleEnum;
 use FireflyIII\Models\GroupMembership;
 use FireflyIII\Models\UserGroup;
 use FireflyIII\Support\Facades\Amount;
-use FireflyIII\Transformers\V2\AbstractTransformer;
+use FireflyIII\Transformers\AbstractTransformer;
 use FireflyIII\User;
 use Illuminate\Support\Collection;
 

app/Transformers/V2/AbstractTransformer.php

@@ -30,6 +30,7 @@ use Symfony\Component\HttpFoundation\ParameterBag;
 
 /**
  * Class AbstractTransformer
+ * @deprecated
  */
 abstract class AbstractTransformer extends TransformerAbstract
 {

app/Transformers/V2/AccountTransformer.php

@@ -36,6 +36,7 @@ use Illuminate\Support\Facades\Log;
 
 /**
  * Class AccountTransformer
+ * @deprecated
  */
 class AccountTransformer extends AbstractTransformer
 {

app/Transformers/V2/BillTransformer.php

@@ -40,6 +40,7 @@ use Illuminate\Support\Facades\Log;
 
 /**
  * Class BillTransformer
+ * @deprecated
  */
 class BillTransformer extends AbstractTransformer
 {

app/Transformers/V2/BudgetLimitTransformer.php

@@ -30,6 +30,7 @@ use League\Fractal\Resource\Item;
 
 /**
  * Class BudgetLimitTransformer
+ * @deprecated
  */
 class BudgetLimitTransformer extends AbstractTransformer
 {

app/Transformers/V2/BudgetTransformer.php

@@ -30,6 +30,7 @@ use Symfony\Component\HttpFoundation\ParameterBag;
 
 /**
  * Class BudgetTransformer
+ * @deprecated
  */
 class BudgetTransformer extends AbstractTransformer
 {

app/Transformers/V2/CurrencyTransformer.php

@@ -29,6 +29,7 @@ use Illuminate\Support\Collection;
 
 /**
  * Class CurrencyTransformer
+ * @deprecated
  */
 class CurrencyTransformer extends AbstractTransformer
 {

app/Transformers/V2/ExchangeRateTransformer.php

@@ -29,6 +29,7 @@ use Illuminate\Support\Collection;
 
 /**
  * Class AccountTransformer
+ * @deprecated
  */
 class ExchangeRateTransformer extends AbstractTransformer
 {

app/Transformers/V2/PiggyBankTransformer.php

@@ -41,6 +41,7 @@ use Illuminate\Support\Facades\Log;
 
 /**
  * Class PiggyBankTransformer
+ * @deprecated
  */
 class PiggyBankTransformer extends AbstractTransformer
 {

app/Transformers/V2/PreferenceTransformer.php

@@ -29,6 +29,7 @@ use Illuminate\Support\Collection;
 
 /**
  * Class PreferenceTransformer
+ * @deprecated
  */
 class PreferenceTransformer extends AbstractTransformer
 {

app/Transformers/V2/TransactionGroupTransformer.php

@@ -43,6 +43,7 @@ use Illuminate\Support\Facades\DB;
 
 /**
  * Class TransactionGroupTransformer
+ * @deprecated
  */
 class TransactionGroupTransformer extends AbstractTransformer
 {

app/Transformers/V2/UserGroupTransformer.php

@@ -32,6 +32,7 @@ use Illuminate\Support\Collection;
 
 /**
  * Class UserGroupTransformer
+ * @deprecated
  */
 class UserGroupTransformer extends AbstractTransformer
 {