Add missing indices.

database/migrations/2024_03_03_174645_add_indices.php

@@ -0,0 +1,54 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\QueryException;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    private const string QUERY_ERROR = 'Could not execute query (table "%s", field "%s"): %s';
+    private const string EXPL        = 'If the index already exists (see error), this is not an problem. Otherwise, please open a GitHub discussion.';
+
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        // add missing indices
+        $set = [
+            'account_meta'           => ['id', 'account_id'],
+            'accounts'               => ['id', 'user_id', 'user_group_id', 'account_type_id'],
+            'budgets'                => ['id', 'user_id', 'user_group_id'],
+            'categories'             => ['id', 'user_id', 'user_group_id'],
+            'transaction_currencies' => ['id', 'code'],
+            'transaction_groups'     => ['id', 'user_id', 'user_group_id'],
+            'transaction_journals'   => ['id', 'user_id', 'user_group_id', 'transaction_group_id', 'transaction_type_id', 'transaction_currency_id', 'bill_id'],
+            'transactions'           => ['id', 'user_id', 'user_group_id', 'account_id', 'transaction_journal_id', 'transaction_currency_id', 'foreign_currency_id'],
+        ];
+
+        foreach ($set as $table => $fields) {
+            foreach ($fields as $field) {
+                try {
+                    Schema::table(
+                        $table,
+                        static function (Blueprint $blueprint) use ($field): void {
+                            $blueprint->index($field);
+                        }
+                    );
+                } catch (QueryException $e) {
+                    app('log')->error(sprintf(self::QUERY_ERROR, $table, $field, $e->getMessage()));
+                    app('log')->error(self::EXPL);
+                }
+            }
+        }
+
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};