In Yii2, an error is reported: call to undefined method closure::EvaluateDependency()
1. In Yii2, an error is reported: call to undefined method closure::EvaluateDependency(). as shown in Figure 1
2. Add a page cache to the details page corresponding to the View method. The code is implemented as follows
// 新增 fileCache 组件,用于页面缓存等大数据内容
'fileCache' => [
'class' => 'yii\caching\FileCache',
'cachePath' => '@runtime/cache/pages', // 可自定义路径
'directoryLevel' => 2, // 默认即可,便于分目录管理文件
],
use yii\caching\DbDependency;
use yii\filters\PageCache;
public function behaviors()
{
return [
'pageCache' => [
'class' => PageCache::class,
'only' => ['view'], // 仅缓存 view 动作
'duration' => 300, // 缓存 5 分钟
'variations' => [
Yii::$app->request->get('id'),
Yii::$app->request->get('alias'),
],
'dependency' => function () {
$alias = Yii::$app->request->get('alias');
$id = Yii::$app->request->get('id');
if (!empty($alias)) {
return new DbDependency([
'sql' => 'SELECT updated_at FROM use_cases WHERE alias = :alias LIMIT 1',
'params' => [':alias' => $alias],
]);
} elseif (!empty($id)) {
return new DbDependency([
'sql' => 'SELECT updated_at FROM use_cases WHERE id = :id LIMIT 1',
'params' => [':id' => $id],
]);
}
return null; // 不缓存
},
'cache' => 'fileCache', // 指定使用 file 缓存组件
],
];
}
3. The current version of Yii2 is 2.0.50. Instead of directly passing the closure to dependency, it is a dependency instance outside the behavior
public function behaviors()
{
$alias = Yii::$app->request->get('alias');
$id = Yii::$app->request->get('id');
if (!empty($alias)) {
$dependency = new DbDependency([
'sql' => 'SELECT updated_at FROM use_cases WHERE alias = :alias LIMIT 1',
'params' => [':alias' => $alias],
]);
} elseif (!empty($id)) {
$dependency = new DbDependency([
'sql' => 'SELECT updated_at FROM use_cases WHERE id = :id LIMIT 1',
'params' => [':id' => $id],
]);
} else {
// 不缓存或默认缓存依赖
$dependency = null;
}
return [
'pageCache' => [
'class' => PageCache::class,
'only' => ['view'],
'duration' => 300,
'variations' => [
$id,
$alias,
],
'dependency' => $dependency,
'cache' => 'fileCache',
],
];
}
4. No more errors, check the debug log, Valid page content is found in the cache. . This confirms that the page cache is in effect, in line with expectations. as shown in Figure 2
5. Check the frontend/runtime/cache/pages directory to determine that the corresponding page cache has been generated. as shown in Figure 3


