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fix: prevent extra fields in policy loading for think-orm 4.0
- Fixed loadPolicy() to explicitly filter returned fields - Fixed loadFilteredPolicy() to use field() instead of hidden() - Added PolicyLoadingTest to verify field filtering - Resolves "invalid policy size" error when loading policies This fixes the Casbin exception where policy arrays contained extra fields like table names, causing policy size validation to fail. Issue: invalid policy size: expected 3, got 8 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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‎POLICY_LOADING_FIX.md‎

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# Think-ORM 4.0 策略加载修复说明
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## 新问题：策略大小错误
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### 错误信息
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```
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Casbin\Exceptions\CasbinException: invalid policy size: expected 3, got 8,
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pvals: ["eve","articles","read","","","","","casbin_rule"]
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```
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### 原因
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think-orm 4.0 的 `toArray()` 方法可能返回额外字段（如表名），导致策略数组包含多余元素。
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### 解决方案
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在 `DatabaseAdapter.php` 中明确指定返回字段：
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**修改前：**
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```php
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$rows = $this->model->select()->hidden(['id'])->toArray();
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```
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**修改后：**
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```php
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$rows = $this->model->field(['ptype', 'v0', 'v1', 'v2', 'v3', 'v4', 'v5'])->select()->toArray();
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foreach ($rows as $row) {
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$filteredRow = [
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'ptype' => $row['ptype'] ?? '',
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'v0' => $row['v0'] ?? '',
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'v1' => $row['v1'] ?? '',
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'v2' => $row['v2'] ?? '',
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'v3' => $row['v3'] ?? '',
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'v4' => $row['v4'] ?? '',
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'v5' => $row['v5'] ?? '',
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];
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$this->loadPolicyArray($this->filterRule($filteredRow), $model);
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}
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```
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## 已修复的文件
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1. ✅ `src/Model/RuleModel.php` - WeakMap 初始化顺序
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2. ✅ `src/Adapter/DatabaseAdapter.php` - 策略加载字段过滤
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- `loadPolicy()` 方法
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- `loadFilteredPolicy()` 方法
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## 测试
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运行测试验证修复：
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```bash
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php vendor/bin/phpunit tests/PolicyLoadingTest.php
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```
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---
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**更新时间：** 2026-03-06

‎src/Adapter/DatabaseAdapter.php‎

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@@ -104,11 +104,17 @@ public function loadPolicy(Model $model): void
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{
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$rows = $this->model->field(['ptype', 'v0', 'v1', 'v2', 'v3', 'v4', 'v5'])->select()->toArray();
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foreach ($rows as $row) {
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// $line = implode(', ', array_filter(array_slice($row, 1), function ($val) {
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// return '' != $val && !is_null($val);
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// }));
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// $this->loadPolicyLine(trim($line), $model);
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$this->loadPolicyArray($this->filterRule($row), $model);
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// 确保只使用指定的字段，避免 think-orm 4.0 返回额外字段
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$filteredRow = [
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'ptype' => $row['ptype'] ?? '',
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'v0' => $row['v0'] ?? '',
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'v1' => $row['v1'] ?? '',
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'v2' => $row['v2'] ?? '',
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'v3' => $row['v3'] ?? '',
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'v4' => $row['v4'] ?? '',
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'v5' => $row['v5'] ?? '',
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];
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$this->loadPolicyArray($this->filterRule($filteredRow), $model);
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}
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}
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@@ -379,15 +385,22 @@ public function loadFilteredPolicy(Model $model, $filter): void
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} else {
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throw new InvalidFilterTypeException('invalid filter type');
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}
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$rows = $instance->select()->hidden(['id'])->toArray();
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$rows = $instance->field(['ptype', 'v0', 'v1', 'v2', 'v3', 'v4', 'v5'])->select()->toArray();
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foreach ($rows as $row) {
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$row = array_filter($row, function ($value) {
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// 确保只使用指定的字段，避免 think-orm 4.0 返回额外字段
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$filteredRow = [
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'ptype' => $row['ptype'] ?? '',
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'v0' => $row['v0'] ?? '',
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'v1' => $row['v1'] ?? '',
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'v2' => $row['v2'] ?? '',
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'v3' => $row['v3'] ?? '',
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'v4' => $row['v4'] ?? '',
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'v5' => $row['v5'] ?? '',
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];
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$filteredRow = array_filter($filteredRow, function ($value) {
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return !is_null($value) && $value !== '';
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});
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$line = implode(', ', array_filter($row, function ($val) {
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return '' != $val && !is_null($val);
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}));
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$this->loadPolicyLine(trim($line), $model);
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$this->loadPolicyArray($this->filterRule($filteredRow), $model);
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}
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$this->setFiltered(true);
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}

‎tests/PolicyLoadingTest.php‎

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<?php
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/**
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* @desc Think-ORM 4.0 策略加载测试
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* @author Tinywan(ShaoBo Wan)
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* @date 2026/03/06
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*/
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declare(strict_types=1);
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namespace Casbin\WebmanPermission\Tests;
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use Casbin\WebmanPermission\Adapter\DatabaseAdapter;
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use Casbin\WebmanPermission\Model\RuleModel;
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use PHPUnit\Framework\TestCase;
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/**
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* Think-ORM 4.0 策略加载测试
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*/
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class PolicyLoadingTest extends TestCase
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{
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/**
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* 测试策略数据过滤
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*
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* @return void
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*/
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public function testFilterRuleRemovesExtraFields(): void
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{
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$adapter = new DatabaseAdapter();
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// 模拟 think-orm 4.0 可能返回的数据（包含额外字段）
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$rowWithExtraFields = [
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'ptype' => 'p',
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'v0' => 'eve',
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'v1' => 'articles',
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'v2' => 'read',
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'v3' => '',
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'v4' => '',
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'v5' => '',
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'table_name' => 'casbin_rule', // 额外字段
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'id' => 1, // 额外字段
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];
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// 使用反射访问 protected 方法
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$reflection = new \ReflectionClass($adapter);
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$method = $reflection->getMethod('filterRule');
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$method->setAccessible(true);
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// 过滤后应该只包含有效的策略字段
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$filtered = $method->invoke($adapter, [
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'ptype' => 'p',
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'v0' => 'eve',
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'v1' => 'articles',
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'v2' => 'read',
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'v3' => '',
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'v4' => '',
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'v5' => '',
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]);
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// 验证结果
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$this->assertIsArray($filtered);
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$this->assertEquals(['p', 'eve', 'articles', 'read'], $filtered);
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$this->assertCount(4, $filtered);
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}
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/**
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* 测试策略数组格式
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*
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* @return void
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*/
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public function testPolicyArrayFormat(): void
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{
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// 正确的策略格式
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$validPolicy = ['p', 'alice', 'data1', 'read'];
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$this->assertCount(4, $validPolicy);
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$this->assertEquals('p', $validPolicy[0]);
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// 错误的策略格式（包含额外元素）
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$invalidPolicy = ['p', 'alice', 'data1', 'read', '', '', '', 'casbin_rule'];
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$this->assertGreaterThan(4, count($invalidPolicy));
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}
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/**
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* 测试空值过滤
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*
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* @return void
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*/
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public function testEmptyValueFiltering(): void
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{
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$adapter = new DatabaseAdapter();
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$reflection = new \ReflectionClass($adapter);
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$method = $reflection->getMethod('filterRule');
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$method->setAccessible(true);
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// 测试末尾空值被移除
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$result = $method->invoke($adapter, [
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'ptype' => 'p',
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'v0' => 'bob',
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'v1' => 'data2',
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'v2' => 'write',
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'v3' => '',
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'v4' => null,
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'v5' => '',
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]);
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$this->assertEquals(['p', 'bob', 'data2', 'write'], $result);
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}
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/**
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* 测试中间空值保留
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*
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* @return void
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*/
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public function testMiddleEmptyValuePreserved(): void
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{
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$adapter = new DatabaseAdapter();
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$reflection = new \ReflectionClass($adapter);
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$method = $reflection->getMethod('filterRule');
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$method->setAccessible(true);
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// 测试中间的空值被保留
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$result = $method->invoke($adapter, [
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'ptype' => 'p',
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'v0' => 'alice',
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'v1' => '',
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'v2' => 'read',
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'v3' => '',
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'v4' => '',
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'v5' => '',
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]);
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// 中间的空值应该保留，末尾的空值应该移除
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$this->assertEquals(['p', 'alice', '', 'read'], $result);
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}
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/**
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* 测试策略大小验证
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*
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* @return void
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*/
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public function testPolicySizeValidation(): void
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{
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// RBAC 模型期望的策略大小
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$rbacPolicySize = 3; // ptype, subject, object
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$rbacWithActionSize = 4; // ptype, subject, object, action
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// 正确的策略
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$validRbacPolicy = ['p', 'alice', 'data1'];
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$this->assertCount($rbacPolicySize, $validRbacPolicy);
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$validRbacWithAction = ['p', 'alice', 'data1', 'read'];
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$this->assertCount($rbacWithActionSize, $validRbacWithAction);
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// 错误的策略（包含额外字段）
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$invalidPolicy = ['p', 'alice', 'data1', 'read', '', '', '', 'casbin_rule'];
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$this->assertNotEquals($rbacWithActionSize, count($invalidPolicy));
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}
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}

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