diff --git a/src/Middleware/RequestContextMiddleware.php b/src/Middleware/RequestContextMiddleware.php
index 456f424..b22c631 100644
--- a/src/Middleware/RequestContextMiddleware.php
+++ b/src/Middleware/RequestContextMiddleware.php
@@ -22,13 +22,15 @@ class RequestContextMiddleware implements MiddlewareInterface
     {
         $rpcContext = Util::get(RpcContext::class);
 
-        $traceId = $request->getHeaderLine('X-Trace-Id')
-            ?: uniqid('t-', true);
+        $traceId = $rpcContext->get('trace_id');
+        if (empty($traceId)) {
+            $traceId = $request->getHeaderLine('X-Trace-Id') ?: uniqid('t-', true);
+        }
         Context::set('trace_id', $traceId);
         $rpcContext->set('trace_id', $traceId);
 
         // app版本
-        $appVersion = $request->getHeaderLine('X-App-Version') ?: '';
+        $appVersion = $rpcContext->get('app_version') ?: $request->getHeaderLine('X-App-Version') ?: '';
         Context::set('app_version', $appVersion);
         $rpcContext->set('app_version', $appVersion);
 
@@ -36,7 +38,7 @@ class RequestContextMiddleware implements MiddlewareInterface
         // APP: app
         // 微信小程序： wx_mini
         // 官网： web_official
-        $platformName = $request->getHeaderLine('X-Platform-Name') ?: '';
+        $platformName = $rpcContext->get('platform_name') ?: $request->getHeaderLine('X-Platform-Name') ?: '';
 
         Context::set('platform_name', $platformName);
         $rpcContext->set('platform_name', $platformName);
diff --git a/src/Model.php b/src/Model.php
index b06dda1..e19e87e 100644
--- a/src/Model.php
+++ b/src/Model.php
@@ -119,13 +119,7 @@ abstract class Model extends HyperfModel implements CacheableInterface
         }
 
         $this->applySearch($query, $params);
-
-        if ($this->sortable) {
-            $sortConfig = $this->getSortConfig();
-            if ($sortConfig) {
-                $query->orderBy($sortConfig['field'], $sortConfig['direction']);
-            }
-        }
+        $this->applyOrdering($query, $params);
 
         $withDeleted = filter_var($params['with_deleted'] ?? false, FILTER_VALIDATE_BOOLEAN);
         if ($withDeleted) {
@@ -208,12 +202,48 @@ abstract class Model extends HyperfModel implements CacheableInterface
         $searchParams = array_intersect_key($params, array_flip($allowedSearchFields));
 
         // 合并系统参数与合法搜索参数（排除其他未知参数）
-        $systemParams = ['page', 'size', 'with_deleted', 'parent_id'];
+        $systemParams = ['page', 'size', 'with_deleted', 'parent_id', 'order_by', 'order_direction'];
         $validSystemParams = array_intersect_key($params, array_flip($systemParams));
 
         return array_merge($validSystemParams, $searchParams);
     }
 
+    /**
+     * 应用排序逻辑，支持自定义 order_by/order_direction.
+     */
+    protected function applyOrdering(Builder $query, array $params): void
+    {
+        $orderField = $params['order_by'] ?? null;
+        $orderDirection = strtolower((string) ($params['order_direction'] ?? 'asc'));
+
+        if (is_string($orderField) && $this->isValidOrderField($orderField)) {
+            $direction = $orderDirection === 'desc' ? 'desc' : 'asc';
+            $query->orderBy($orderField, $direction);
+            if ($orderField !== 'id' && ! str_contains($orderField, '.')) {
+                $query->orderBy('id', 'asc');
+            }
+            return;
+        }
+
+        if ($this->sortable) {
+            $sortConfig = $this->getSortConfig();
+            if ($sortConfig) {
+                $query->orderBy($sortConfig['field'], $sortConfig['direction']);
+                if ($sortConfig['field'] !== 'id' && ! str_contains($sortConfig['field'], '.')) {
+                    $query->orderBy('id', 'asc');
+                }
+            }
+        }
+    }
+
+    /**
+     * 校验排序字段，避免 SQL 注入.
+     */
+    protected function isValidOrderField(string $field): bool
+    {
+        return (bool) preg_match('/^[a-zA-Z0-9_\.]+$/', $field);
+    }
+
     /**
      * 快捷创建.
      */
@@ -290,6 +320,60 @@ abstract class Model extends HyperfModel implements CacheableInterface
         return $record;
     }
 
+    /**
+     * 查找记录，不存在时抛出业务异常.
+     */
+    public static function findOrThrow($id, string $message = '数据不存在'): static
+    {
+        $record = static::query()->find($id);
+        if (is_null($record)) {
+            throw new BusinessException($message, 404);
+        }
+        return $record;
+    }
+
+    /**
+     * Aether 兼容：创建记录并返回 ID.
+     */
+    public static function createBy(array $data): int
+    {
+        return static::query()->create($data)->id;
+    }
+
+    /**
+     * Aether 兼容：按主键查找，不存在时抛出业务异常.
+     */
+    public static function findByPk(int $id): array|Builder|Collection|HyperfModel
+    {
+        $record = static::query()->find($id);
+        if (is_null($record)) {
+            throw new BusinessException(sprintf('找不到 ID 为 %d 的记录', $id), 404);
+        }
+        return $record;
+    }
+
+    /**
+     * Aether 兼容：按主键更新.
+     */
+    public static function updateByPk(int $id, array $data): bool
+    {
+        if (! static::query()->where('id', $id)->exists()) {
+            throw new BusinessException(sprintf('找不到 ID 为 %d 的记录', $id), 404);
+        }
+        return static::query()->where('id', $id)->update($data) > 0;
+    }
+
+    /**
+     * Aether 兼容：按主键删除.
+     */
+    public static function deleteByPk(int $id): bool
+    {
+        if (! static::query()->where('id', $id)->exists()) {
+            throw new BusinessException(sprintf('找不到 ID 为 %d 的记录', $id), 404);
+        }
+        return static::query()->where('id', $id)->delete() > 0;
+    }
+
     /**
      * 获取器处理.
      */
diff --git a/src/Trait/TreeTrait.php b/src/Trait/TreeTrait.php
new file mode 100644
index 0000000..0a80bff
--- /dev/null
+++ b/src/Trait/TreeTrait.php
@@ -0,0 +1,130 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Dhd\Micro\Core\Trait;
+
+use Dhd\Micro\Core\Model;
+use Hyperf\Database\Model\Collection;
+use LogicException;
+
+trait TreeTrait
+{
+    public function __construct(array $attributes = [])
+    {
+        parent::__construct($attributes);
+
+        if (! $this instanceof Model) {
+            throw new LogicException(
+                '使用TreeTrait的类必须继承Dhd\Micro\Core\Model，当前类: ' . get_class($this)
+            );
+        }
+    }
+
+    /**
+     * 构建树形结构.
+     */
+    public static function buildTree($items, int $parentId = 0): array
+    {
+        $self = new static();
+        $parentField = $self->getParentIdField();
+        $sortField = $self->getSortField();
+
+        $items = $items instanceof Collection ? $items->toArray() : $items;
+        $tree = [];
+
+        foreach ($items as $item) {
+            if ($item[$parentField] == $parentId) {
+                $children = static::buildTree($items, $item['id']);
+                if (! empty($children)) {
+                    $item['children'] = $children;
+                }
+                $tree[] = $item;
+            }
+        }
+
+        $self->sortTreeItems($tree, $sortField);
+        return $tree;
+    }
+
+    /**
+     * 获取指定节点的所有子节点ID.
+     */
+    public function getChildIds(int $id): array
+    {
+        $parentField = $this->getParentIdField();
+        $allItems = $this->newQuery()->get(['id', $parentField])->toArray();
+        $ids = [$id];
+
+        $this->collectChildIds($allItems, $id, $parentField, $ids);
+        return $ids;
+    }
+
+    /**
+     * 获取节点的完整路径.
+     */
+    public function getPath(int $id): array
+    {
+        $parentField = $this->getParentIdField();
+        $node = $this->newQuery()->find($id);
+        if (! $node) {
+            return [];
+        }
+
+        $path = [$node->toArray()];
+        $parentId = $node[$parentField];
+
+        while ($parentId > 0) {
+            $parent = $this->newQuery()->find($parentId);
+            if (! $parent) {
+                break;
+            }
+            array_unshift($path, $parent->toArray());
+            $parentId = $parent[$parentField];
+        }
+
+        return $path;
+    }
+
+    /**
+     * 获取父ID字段名（子类实现）.
+     */
+    abstract protected function getParentIdField(): string;
+
+    /**
+     * 获取排序字段名（子类实现）.
+     */
+    abstract protected function getSortField(): string;
+
+    /**
+     * 树形节点排序.
+     */
+    protected function sortTreeItems(array &$items, string $sortField): void
+    {
+        if (empty($sortField)) {
+            return;
+        }
+
+        usort($items, function ($a, $b) use ($sortField) {
+            $direction = $this->treeSortDirection ?? 'asc';
+            $aValue = $a[$sortField] ?? 0;
+            $bValue = $b[$sortField] ?? 0;
+            return $direction === 'desc'
+                ? $bValue <=> $aValue
+                : $aValue <=> $bValue;
+        });
+    }
+
+    /**
+     * 递归收集子节点ID.
+     */
+    private function collectChildIds(array $items, int $parentId, string $parentField, array &$ids): void
+    {
+        foreach ($items as $item) {
+            if ($item[$parentField] == $parentId) {
+                $ids[] = $item['id'];
+                $this->collectChildIds($items, $item['id'], $parentField, $ids);
+            }
+        }
+    }
+}