user affiliation schema completed

backend/app/Http/Requests/IndexUserAffiliationRequest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class IndexUserAffiliationRequest extends FormRequest
+{
+    /**
+     * L'autorizzazione è gestita dal middleware di rotta (tier.app).
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'institution_id' => ['nullable', 'integer', 'exists:institutions,id'],
+            'user_id' => ['nullable', 'integer', 'exists:users,id'],
+            'user_position_id' => ['nullable', 'integer', 'exists:user_positions,id'],
+            'open' => ['nullable', 'boolean'],
+            'trashed' => ['nullable', Rule::in(['with', 'only'])],
+            'per_page' => ['nullable', 'integer', 'min:1', 'max:100'],
+        ];
+    }
+}