diff --git a/app/Http/Controllers/Api/TopicsController.php b/app/Http/Controllers/Api/TopicsController.php
index 6bf7174..6eb5c4e 100644
--- a/app/Http/Controllers/Api/TopicsController.php
+++ b/app/Http/Controllers/Api/TopicsController.php
@@ -4,7 +4,9 @@ namespace App\Http\Controllers\Api;
 
 use App\Http\Requests\Api\TopicRequest;
 use App\Models\Topic;
+use App\Models\User;
 use App\Transformers\TopicTransformer;
+use Illuminate\Http\Request;
 
 class TopicsController extends Controller
 {
@@ -28,4 +30,35 @@ class TopicsController extends Controller
         $topic->update($request->all());
         return $this->response->item($topic, new TopicTransformer());
     }
+
+    public function index(Request $request)
+    {
+        $query = Topic::query();
+        if ($category_id = $request->get('category_id', 0)) {
+            $query->where(['category_id', $category_id]);
+        }
+        $order = $request->get('order', 'recent');
+        $query->withOrder($query, $order);
+        $topics = $query->paginate(20);
+        return $this->response->paginator($topics, new TopicTransformer());
+    }
+
+    public function userIndex(User $user)
+    {
+        $topics = $user->topics()->recent()->paginate(20);
+        return $this->response->paginator($topics, new TopicTransformer());
+    }
+
+    /**
+     * @param Topic $topic
+     * @return \Dingo\Api\Http\Response
+     * @throws \Illuminate\Auth\Access\AuthorizationException
+     * @throws \Throwable
+     */
+    public function destroy(Topic $topic)
+    {
+        $this->authorize('update', $topic);
+        $topic->delete();
+        return $this->response->noContent();
+    }
 }
diff --git a/app/Models/Topic.php b/app/Models/Topic.php
index 61d3778..c69b054 100644
--- a/app/Models/Topic.php
+++ b/app/Models/Topic.php
@@ -16,6 +16,8 @@ namespace App\Models;
  * @property string excerpt
  * @property string created_at
  * @property string updated_at
+ * @property User user
+ * @property Category category
  * @package App\Models
  */
 class Topic extends Model
diff --git a/app/Transformers/TopicTransformer.php b/app/Transformers/TopicTransformer.php
index 7c69480..3ca59a5 100644
--- a/app/Transformers/TopicTransformer.php
+++ b/app/Transformers/TopicTransformer.php
@@ -15,6 +15,9 @@ use League\Fractal\TransformerAbstract;
 
 class TopicTransformer extends TransformerAbstract
 {
+
+    protected $availableIncludes = ['user', 'category'];
+
     public function transform(Topic $topic)
     {
         return [
@@ -32,4 +35,14 @@ class TopicTransformer extends TransformerAbstract
             'updated_at' => $topic->updated_at instanceof Carbon ? $topic->updated_at->toDateTimeString() : $topic->updated_at,
         ];
     }
+
+    public function includeCategory(Topic $topic)
+    {
+        return $this->item($topic->category, new CategoryTransformer());
+    }
+
+    public function includeUser(Topic $topic)
+    {
+        return $this->item($topic->user, new UserTransformer());
+    }
 }
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 1c90989..f61afcb 100644
--- a/composer.json
+++ b/composer.json
@@ -38,6 +38,7 @@
     "filp/whoops": "~2.0",
     "fzaninotto/faker": "~1.4",
     "mockery/mockery": "~1.0",
+    "overtrue/laravel-query-logger": "^1.0",
     "phpunit/phpunit": "~6.0",
     "summerblue/generator": "~0.5"
   },
diff --git a/composer.lock b/composer.lock
index 1704750..0b6301a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
       "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-  "content-hash": "3e238e73ff229ba2ec8024b3e85640a5",
+  "content-hash": "32f207e4a0d2ec61b4710f12c6b34d6d",
     "packages": [
         {
             "name": "cakephp/chronos",
@@ -5340,6 +5340,49 @@
           "time": "2018-05-29T17:25:09+00:00"
         },
         {
+          "name": "overtrue/laravel-query-logger",
+          "version": "1.0.1",
+          "source": {
+            "type": "git",
+            "url": "https://github.com/overtrue/laravel-query-logger.git",
+            "reference": "af7269a410ebc568bfd88fe807c062bb0f06c737"
+          },
+          "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/overtrue/laravel-query-logger/zipball/af7269a410ebc568bfd88fe807c062bb0f06c737",
+            "reference": "af7269a410ebc568bfd88fe807c062bb0f06c737",
+            "shasum": ""
+          },
+          "require": {
+            "laravel/framework": "5.*"
+          },
+          "type": "library",
+          "extra": {
+            "laravel": {
+              "providers": [
+                "Overtrue\\LaravelQueryLogger\\ServiceProvider"
+              ]
+            }
+          },
+          "autoload": {
+            "psr-4": {
+              "Overtrue\\LaravelQueryLogger\\": "src"
+            }
+          },
+          "notification-url": "https://packagist.org/downloads/",
+          "license": [
+            "MIT"
+          ],
+          "authors": [
+            {
+              "name": "overtrue",
+              "email": "anzhengchao@gmail.com"
+            }
+          ],
+          "description": "A dev tool to log all queries for laravel application.",
+          "time": "2017-10-11T10:02:01+00:00"
+        },
+      {
             "name": "phar-io/manifest",
             "version": "1.0.1",
             "source": {
diff --git a/routes/api.php b/routes/api.php
index 76a8273..2d167ab 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -15,7 +15,7 @@ $api = app('Dingo\Api\Routing\Router');
 
 $api->version('v1', [
     'namespace' => 'App\Http\Controllers\Api',
-    'middleware' => ['serializer:array', 'bindings'],
+    'middleware' => ['serializer:array', 'bindings'],//注意里的bindings中间件，使用这个才能使用隐式路由绑定
 ], function ($api) {
     $api->group([
         'middleware' => 'api.throttle',
@@ -51,6 +51,10 @@ $api->version('v1', [
         // 游客可以访问的接口
         $api->get('categories', 'CategoriesController@index')
             ->name('api.categories.index');
+        //话题列表
+        $api->get('topics', 'TopicsController@index')->name('api.topics.index');
+        //某用户的话题列表
+        $api->get('users/{user}/topics', 'TopicsController@userIndex')->name('api.users.topics.index');
     });
 
     // 需要 token 验证的接口
@@ -68,6 +72,9 @@ $api->version('v1', [
         $api->post('topics', 'TopicsController@store')->name('api.topics.store');
         //发布话题
         $api->patch('topics/{topic}', 'TopicsController@update')->name('api.topics.update');
+        //删除话题
+        $api->delete('topics/{topic}', 'TopicsController@destroy')->name('api.topics.destroy');
+
     });
 
 });
@@ -78,6 +85,4 @@ $api->version('v1', [
     });
 });*/
 
-/*Route::middleware('auth:api')->get('/user', function (Request $request) {
-    return $request->user();
-});*/
+