update code

app/Http/Requests/Document/UpdateRequest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Http\Requests\Document;
+
+use Illuminate\Foundation\Http\FormRequest;
+use App\Entities\Document;
+
+class UpdateRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize()
+    {
+        return Document::find($this->document)->creator_id == $this->user()->id;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'id' => 'nullable|numeric|unique:documents,id,'.$this->document,
+            'symbol' => 'nullable|string|max:30',
+            'abstract' => 'nullable|string',
+            'book_id' => 'nullable|exists:books,id',
+            'type_id' => 'nullable|exists:document_types,id',
+            'signer_id' => 'nullable|exists:signers,id',
+            'writer_id' => 'nullable|exists:users,id',
+            'effective_at' => 'nullable|date',
+            'sign_at' => 'nullable|date',
+            'publisher_id' => 'nullable|exists:organizes,id',
+            'link_id' => 'nullable|exists:documents,id',
+        ];
+    }
+}