diff --git a/examples/api-client/api.request.ts b/examples/api-client/api.request.ts
new file mode 100644
index 000000000..6f529f758
--- /dev/null
+++ b/examples/api-client/api.request.ts
@@ -0,0 +1,25 @@
+/*
+# 客户端常规请求
+
+# 步骤
+
+Step 1: 启动服务器
+yarn run:example api-client/server start
+
+Step 2: 客户端常规请求 —— api.request()
+yarn run:example api-client/api.request
+*/
+import { APIClient } from '@nocobase/sdk';
+
+const api = new APIClient({
+  baseURL: 'http://localhost:13000/api',
+});
+
+(async () => {
+  const response = await api.request({
+    url: 'test:list',
+  });
+  // 等价于
+  // const response = await api.resource('test').list();
+  console.log(response.data);
+})();
diff --git a/examples/api-client/api.resource.ts b/examples/api-client/api.resource.ts
new file mode 100644
index 000000000..657c5ebb0
--- /dev/null
+++ b/examples/api-client/api.resource.ts
@@ -0,0 +1,25 @@
+/*
+# 客户端资源请求
+
+# 步骤
+
+Step 1: 启动服务器
+yarn run:example api-client/server start
+
+Step 2: 客户端资源请求 —— api.resource(name).action(params)
+yarn run:example api-client/api.resource
+*/
+import { APIClient } from '@nocobase/sdk';
+
+const api = new APIClient({
+  baseURL: 'http://localhost:13000/api',
+});
+
+(async () => {
+  const response = await api.resource('test').list();
+  // 等价于 
+  // const response = await api.request({
+  //   url: 'test:list',
+  // });
+  console.log(response.data);
+})();
diff --git a/examples/api-client/server.ts b/examples/api-client/server.ts
new file mode 100644
index 000000000..1116e3b8f
--- /dev/null
+++ b/examples/api-client/server.ts
@@ -0,0 +1,51 @@
+/*
+# 客户端请求
+
+# 步骤
+
+Step 1: 启动服务器
+yarn run:example api-client/server start
+
+Step 2: 客户端常规请求 —— api.request()
+yarn run:example api-client/api.request
+
+Step 3: 客户端资源请求 —— api.resource(name).action(params)
+yarn run:example api-client/api.resource
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+// 定义了一个 test 资源，并提供了相对应的 list 方法
+app.resource({
+  name: 'test',
+  actions: {
+    async list(ctx, next) {
+      ctx.body = 'test list';
+      await next();
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/__tests__/app.test.ts b/examples/app/__tests__/app.test.ts
new file mode 100644
index 000000000..4f6abefbc
--- /dev/null
+++ b/examples/app/__tests__/app.test.ts
@@ -0,0 +1,33 @@
+/*
+# 编写 Application 测试用例
+
+# 执行测试
+yarn jest examples/app/__tests__/app.test.ts
+*/
+import { MockServer, mockServer } from '@nocobase/test';
+
+describe('app test', () => {
+  let app: MockServer;
+
+  beforeEach(() => {
+    app = mockServer();
+  });
+
+  test('test1', async () => {
+    app.resource({
+      name: 'test',
+      actions: {
+        async list(ctx, next) {
+          ctx.body = 'test list';
+          await next();
+        },
+      },
+    });
+    const response = await app.agent().resource('test').list();
+    expect(response.body).toEqual({ data: 'test list' });
+  });
+
+  afterEach(async () => {
+    await app.destroy();
+  });
+});
diff --git a/examples/app/acl.ts b/examples/app/acl.ts
new file mode 100644
index 000000000..25d14470b
--- /dev/null
+++ b/examples/app/acl.ts
@@ -0,0 +1,69 @@
+/*
+Step 1:
+yarn run:example app/acl start
+
+Step 2:
+curl http://localhost:13000/api/test:export
+curl --location --request GET 'http://localhost:13000/api/test:export' --header 'X-Role: admin'
+curl --location --request GET 'http://localhost:13000/api/test:import' --header 'X-Role: admin'
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.acl.define({
+  role: 'admin',
+  actions: {
+    'test:export': {
+      fields: ['a1', 'b1']
+    },
+  },
+});
+
+app.resourcer.use(async (ctx, next) => {
+  ctx.state.currentRole = ctx.get('X-Role');
+  await next();
+});
+
+app.resourcer.use(app.acl.middleware());
+
+app.resource({
+  name: 'test',
+  actions: {
+    async export(ctx, next) {
+      ctx.body = {
+        'ctx.action.params': ctx.action.params,
+      };
+      await next();
+    },
+    async import(ctx, next) {
+      ctx.body = {
+        'ctx.action.params': ctx.action.params,
+      };
+      await next();
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/association2resource.ts b/examples/app/association2resource.ts
new file mode 100644
index 000000000..9eb42caaa
--- /dev/null
+++ b/examples/app/association2resource.ts
@@ -0,0 +1,91 @@
+/*
+Step 1: 将 collections 同步给数据库（建表和字段）
+yarn run:example app/association2resource db:sync
+
+Step 2:
+yarn run:example app/association2resource start
+
+Step 3: Create article
+curl --location --request POST 'http://localhost:13000/api/articles:create' \
+--header 'Content-Type: application/json' \
+--data-raw '{
+    "title": "My first article",
+    "content": "Hello NocoBase!",
+    "user": {
+      "name": "user 1"
+    }
+}'
+
+Step 4: View article user
+curl http://localhost:13000/api/articles/1/user
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: 'a2r_',
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+// 已定义的 collection 会自动转为同名 resource
+app.collection({
+  name: 'articles',
+  fields: [
+    {
+      type: 'string',
+      name: 'title',
+    },
+    {
+      type: 'text',
+      name: 'content',
+    },
+    // 自动转为 articles.user 资源
+    {
+      type: 'belongsTo',
+      name: 'user',
+      // 以下参数缺失时，自动处理
+      // target: 'users',
+      // foreignKey: 'userId',
+      // targetKey: 'id',
+    },
+  ],
+});
+
+// 已定义的 collection 会自动转为同名 resource
+app.collection({
+  name: 'users',
+  fields: [
+    {
+      type: 'string',
+      name: 'name',
+    },
+    // 自动转为 users.articles 资源
+    {
+      type: 'hasMany',
+      name: 'articles',
+      // 以下参数缺失时，自动处理
+      // target: 'articles',
+      // foreignKey: 'userId',
+      // sourceKey: 'id',
+    },
+  ],
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/collection2resource.ts b/examples/app/collection2resource.ts
new file mode 100644
index 000000000..73aee6031
--- /dev/null
+++ b/examples/app/collection2resource.ts
@@ -0,0 +1,59 @@
+/*
+Step 1: 将 collections 同步给数据库（建表和字段）
+yarn run:example app/collection2resource db:sync
+
+Step 2: 启动应用
+yarn run:example app/collection2resource start
+
+Step 3: Create article
+curl --location --request POST 'http://localhost:13000/api/articles:create' \
+--header 'Content-Type: application/json' \
+--data-raw '{
+    "title": "My first article",
+    "content": "Hello NocoBase!"
+}'
+
+Step 4: View article list
+curl http://localhost:13000/api/articles:list
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: 'c2r_',
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+// 已定义的 collection 会自动转为同名 resource
+app.collection({
+  name: 'articles',
+  fields: [
+    {
+      type: 'string',
+      name: 'title',
+    },
+    {
+      type: 'text',
+      name: 'content',
+    },
+  ],
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/context/ctx.action.mergeParams.ts b/examples/app/context/ctx.action.mergeParams.ts
new file mode 100644
index 000000000..bbc67efe1
--- /dev/null
+++ b/examples/app/context/ctx.action.mergeParams.ts
@@ -0,0 +1,77 @@
+/*
+# ctx.action.mergeParams 的用法
+
+一般是在中间件里通过 ctx.action.mergeParams() 方法合并参数
+
+# 步骤：
+
+Step 1:
+yarn run:example app/context/ctx.action.mergeParams start
+
+Step 2:
+curl http://localhost:13000/api/test:list?filter%5Ba%5D=a2&fields=col1
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+});
+
+async function list(ctx, next) {
+  ctx.body = {
+    'action.resourceName': ctx.action.resourceName,
+    'action.resourceOf': ctx.action.resourceOf,
+    'action.actionName': ctx.action.actionName,
+    'action.params': ctx.action.params,
+  };
+  await next();
+}
+
+async function get(ctx, next) {
+  ctx.body = {
+    'action.resourceName': ctx.action.resourceName,
+    'action.resourceOf': ctx.action.resourceOf,
+    'action.actionName': ctx.action.actionName,
+    'action.params': ctx.action.params,
+  };
+  await next();
+}
+
+app.resourcer.use(async (ctx, next) => {
+  // 在 middleware 里修改 action.params
+  ctx.action.mergeParams({
+    filter: {
+      a: 'a1',
+    },
+    fields: ['col1', 'col2'],
+  });
+  await next();
+});
+
+app.resource({
+  name: 'test',
+  actions: {
+    list,
+    get,
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/context/ctx.action.ts b/examples/app/context/ctx.action.ts
new file mode 100644
index 000000000..41d6c51db
--- /dev/null
+++ b/examples/app/context/ctx.action.ts
@@ -0,0 +1,75 @@
+/*
+# ctx.action 的重要参数说明
+
+# 步骤
+
+Step 1:
+yarn run:example app/context/ctx.action start
+
+Step 2:
+curl http://localhost:13000/api/test:list
+curl http://localhost:13000/api/test/1/nest:get
+curl http://localhost:13000/api/test:list?filter%5Ba%5D=a&fields=a,b&sort=a,b
+*/
+
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+});
+
+async function list(ctx, next) {
+  ctx.body = {
+    'action.resourceName': ctx.action.resourceName,
+    'action.resourceOf': ctx.action.resourceOf,
+    'action.actionName': ctx.action.actionName,
+    'action.params': ctx.action.params,
+  };
+  await next();
+}
+
+async function get(ctx, next) {
+  ctx.body = {
+    'action.resourceName': ctx.action.resourceName,
+    'action.resourceOf': ctx.action.resourceOf,
+    'action.actionName': ctx.action.actionName,
+    'action.params': ctx.action.params,
+  };
+  await next();
+}
+
+app.resource({
+  name: 'test',
+  actions: {
+    list,
+    get,
+  },
+});
+
+app.resource({
+  name: 'test.nest',
+  actions: {
+    list,
+    get,
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/context/ctx.db.ts b/examples/app/context/ctx.db.ts
new file mode 100644
index 000000000..705317490
--- /dev/null
+++ b/examples/app/context/ctx.db.ts
@@ -0,0 +1,56 @@
+/*
+# ctx.db 用法
+
+# 步骤
+
+Step 1:
+yarn run:example app/context/ctx.db start
+
+Step 2:
+curl http://localhost:13000/
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.collection({
+  name: 'articles',
+  fields: [
+    {
+      type: 'string',
+      name: 'title',
+    },
+    {
+      type: 'text',
+      name: 'content',
+    },
+  ],
+});
+
+app.use(async (ctx, next) => {
+  ctx.body = ctx.db.getCollection('articles').options;
+  await next();
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/context/ctx.i18n.ts b/examples/app/context/ctx.i18n.ts
new file mode 100644
index 000000000..c3ad80a3b
--- /dev/null
+++ b/examples/app/context/ctx.i18n.ts
@@ -0,0 +1,75 @@
+/*
+# 国际化多语言设置
+
+主要介绍 app.i18n 和 ctx.i18n 的区别
+
+# 步骤：
+
+Step 1:
+yarn run:example app/context/ctx.i18n start
+
+Step 2:
+curl http://localhost:13000/?locale=en-US
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  i18n: {
+    defaultNS: 'test',
+    resources: {
+      'en-US': {
+        test: {
+          hello: 'Hello',
+        },
+      },
+      'zh-CN': {
+        test: {
+          hello: '你好',
+        },
+      },
+    },
+  },
+});
+
+app.i18n.addResources('zh-CN', 'test', {
+  world: '世界',
+});
+
+app.i18n.addResources('en-US', 'test', {
+  world: 'World',
+});
+
+// 改变全局 app.i18n 的多语言，一般用于 cli 环境的多语言切换
+app.i18n.changeLanguage('zh-CN');
+
+app.use(async (ctx, next) => {
+  // ctx.i18n 是 app.i18n 的 clone instance
+  ctx.body = {
+    'ctx.i18n': ctx.i18n.language,
+    'app.i18n': app.i18n.language,
+    'ctx.t': ctx.t('hello') + ' ' + ctx.t('world'),
+    'app.i18n.t': app.i18n.t('hello') + ' ' + app.i18n.t('world'),
+  };
+  await next();
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/custom-command.ts b/examples/app/custom-command.ts
new file mode 100644
index 000000000..a448eb667
--- /dev/null
+++ b/examples/app/custom-command.ts
@@ -0,0 +1,39 @@
+/*
+# 自定义命令行
+
+# 步骤
+
+Step 1:
+yarn run:example app/custom-command hello
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.command('hello').action(() => {
+  console.log('hello cli');
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
+
diff --git a/examples/app/custom-plugin.ts b/examples/app/custom-plugin.ts
new file mode 100644
index 000000000..4dcc92fef
--- /dev/null
+++ b/examples/app/custom-plugin.ts
@@ -0,0 +1,57 @@
+/*
+# 编写一个最简单的插件
+
+# 步骤
+
+Step 1: Start app
+yarn run:example plugins/custom-plugin start
+
+Step 2: View test list
+http://localhost:13000/api/test:list
+*/
+import { Application, Plugin } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+// Encapsulate modules into a plugin
+class MyPlugin extends Plugin {
+  getName() {
+    return 'MyPlugin';
+  }
+  async load() {
+    app.resource({
+      name: 'test',
+      actions: {
+        async list(ctx) {
+          ctx.body = 'test list';
+        },
+      },
+    });
+  }
+}
+
+// Register plugin
+app.plugin(MyPlugin);
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/i18n.ts b/examples/app/i18n.ts
new file mode 100644
index 000000000..7942c9490
--- /dev/null
+++ b/examples/app/i18n.ts
@@ -0,0 +1,72 @@
+/*
+# 国际化多语言
+
+Step 1:
+yarn run:example app/i18n start
+
+Step 2:
+curl http://localhost:13000/api/test:get
+curl http://localhost:13000/api/test:get?locale=en-US
+curl --location --request GET 'http://localhost:13000/api/test:get' --header 'X-Locale: en-US'
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  i18n: {
+    defaultNS: 'test',
+    resources: {
+      'en-US': {
+        test: {
+          hello: 'Hello',
+        },
+      },
+      'zh-CN': {
+        test: {
+          hello: '你好',
+        },
+      },
+    },
+  },
+});
+
+app.i18n.addResources('zh-CN', 'test', {
+  world: '世界',
+});
+
+app.i18n.addResources('en-US', 'test', {
+  world: 'World',
+});
+
+// 改变全局 app.i18n 的多语言，一般用于 cli 环境的多语言
+app.i18n.changeLanguage('zh-CN');
+
+app.resource({
+  name: 'test',
+  actions: {
+    async get(ctx, next) {
+      ctx.body = ctx.t('hello') + ' ' + ctx.t('world');
+      await next();
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/middleware/acl.ts b/examples/app/middleware/acl.ts
new file mode 100644
index 000000000..914d29f59
--- /dev/null
+++ b/examples/app/middleware/acl.ts
@@ -0,0 +1,87 @@
+/*
+# app.acl.use 用法
+
+# 步骤
+
+Step 1:
+yarn run:example app/middleware/acl start
+
+Step 2:
+curl http://localhost:13000/api/test:export
+curl http://localhost:13000/api/test:export?skip=1
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.acl.define({
+  role: 'admin',
+  actions: {
+    'test:export': {
+      fields: ['a1', 'b1'],
+    },
+  },
+});
+
+app.acl.use(async (ctx, next) => {
+  ctx.permission = {
+    // 是否跳过 acl 判断
+    skip: !!ctx.request.query.skip,
+    // 如果 skip=true 不处理
+    // 如果 skip=false，can.params 会通过 ctx.action.mergeParams() 合并到 ctx.action.params
+    can: {
+      params: {
+        fields: ['a1', 'b1', 'b3'],
+      },
+    },
+  };
+  // acl 中间件里也可以直接给 body 赋值
+  ctx.body = {
+    test: 'test',
+  };
+  await next();
+});
+
+app.resourcer.use(async (ctx, next) => {
+  // 当前角色
+  ctx.state.currentRole = ctx.get('X-Role');
+  await next();
+});
+
+app.resourcer.use(app.acl.middleware());
+
+app.resource({
+  name: 'test',
+  actions: {
+    async export(ctx, next) {
+      ctx.body = {
+        ...ctx.body,
+        'ctx.action.params': ctx.action.params,
+      };
+      await next();
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/middleware/app.ts b/examples/app/middleware/app.ts
new file mode 100644
index 000000000..05f36df21
--- /dev/null
+++ b/examples/app/middleware/app.ts
@@ -0,0 +1,43 @@
+/*
+# app.use 用法，与 Koa 相同
+
+# 步骤
+
+Step 1:
+yarn run:example app/middleware/app start
+
+Step 2:
+curl http://localhost:13000/
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+// Same as Koa
+app.use(async (ctx, next) => {
+  ctx.body = 'Hello NocoBase';
+  await next();
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/middleware/resourcer.ts b/examples/app/middleware/resourcer.ts
new file mode 100644
index 000000000..b39fbf847
--- /dev/null
+++ b/examples/app/middleware/resourcer.ts
@@ -0,0 +1,60 @@
+/*
+# app.resourcer.use 用法
+
+# 步骤
+
+Step 1:
+yarn run:example app/middleware/resourcer start
+
+Step 2:
+curl http://localhost:13000/api/test:list
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.resource({
+  name: 'test',
+  actions: {
+    async list(ctx, next) {
+      ctx.body = ctx.body || [];
+      ctx.body.push('test list');
+      await next();
+    }
+  },
+});
+
+app.resourcer.use(async (ctx, next) => {
+  ctx.body = ctx.body || [];
+  ctx.body.push('resourcer middleware');
+  await next();
+});
+
+app.use(async (ctx, next) => {
+  ctx.body = ctx.body || [];
+  ctx.body.push('app middleware');
+  await next();
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/migrations/add-migration.ts b/examples/app/migrations/add-migration.ts
new file mode 100644
index 000000000..bc0ca91dc
--- /dev/null
+++ b/examples/app/migrations/add-migration.ts
@@ -0,0 +1,62 @@
+/*
+# Application Migration
+
+# 步骤
+
+Step 1:
+yarn run:example app/migrations/add-migration migrator up
+
+Step 2:
+yarn run:example app/migrations/add-migration migrator down
+*/
+import { DataTypes } from '@nocobase/database';
+import { Application, Migration } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+class MyMigration extends Migration {
+  async up() {
+    /*
+    可用的属性
+    this.app;
+    this.db;
+    this.queryInterface;
+    this.sequelize;
+    */
+    await this.queryInterface.createTable('test', {
+      name: DataTypes.STRING,
+    });
+  }
+
+  async down() {
+    await this.queryInterface.dropTable('test');
+  }
+}
+
+app.db.addMigration({
+  name: 'my-migration',
+  migration: MyMigration,
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/multi-app.ts b/examples/app/multi-app.ts
index ed66861cb..ea3e4fcc8 100644
--- a/examples/app/multi-app.ts
+++ b/examples/app/multi-app.ts
@@ -1,3 +1,11 @@
+/*
+# 支持多应用（子应用）
+
+yarn run:example app/multi-app start
+
+curl http://localhost:13000/api/test:list
+curl http://localhost:13000/sub1/api/test:list
+*/
 import { Application } from '@nocobase/server';
 import { IncomingMessage } from 'http';
 
@@ -20,10 +28,6 @@ const app = new Application({
   plugins: [],
 });
 
-if (require.main === module) {
-  app.runAsCLI();
-}
-
 const subApp1 = app.appManager.createApplication('sub1', {
   database: app.db,
   resourcer: {
@@ -56,7 +60,8 @@ app.appManager.setAppSelector((req: IncomingMessage) => {
   return null;
 });
 
-export default app;
+if (require.main === module) {
+  app.runAsCLI();
+}
 
-// http://localhost:13000/api/test:list
-// http://localhost:13000/sub1/api/test:list
+export default app;
diff --git a/examples/app/resource-actions/action-merge-params.ts b/examples/app/resource-actions/action-merge-params.ts
new file mode 100644
index 000000000..2c0fc445e
--- /dev/null
+++ b/examples/app/resource-actions/action-merge-params.ts
@@ -0,0 +1,91 @@
+/*
+# Action 参数的多来源合并
+
+# 步骤：
+
+Step 1:
+yarn run:example app/resource-actions/action-merge-params start
+
+Step 2: 客户端请求时提供参数也是一种来源
+curl http://localhost:13000/api/test:list?filter%5Ba%5D=a2&fields=col1
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+});
+
+// 来源1：resourcer.use 中间件里直接 action.mergeParams
+app.resourcer.use(async (ctx, next) => {
+  // 在 middleware 里修改 action.params
+  ctx.action.mergeParams({
+    filter: {
+      col1: 'val1',
+    },
+    fields: ['col1', 'col2', 'col4'],
+  });
+  await next();
+});
+
+// 来源2：app.acl.use 中间件里的 ctx.permission.can.params
+app.acl.use(async (ctx, next) => {
+  ctx.permission = {
+    // 是否跳过 acl 判断
+    skip: !!ctx.request.query.skip,
+    // 如果 skip=true 不处理
+    // 如果 skip=false，can.params 会通过 ctx.action.mergeParams() 合并到 ctx.action.params
+    can: {
+      params: {
+        filter: {
+          col1: 'val2',
+        },
+        fields: ['col1', 'col2', 'col3'],
+      },
+    },
+  };
+  await next();
+});
+
+app.resourcer.use(app.acl.middleware());
+
+app.resource({
+  name: 'test',
+  actions: {
+    // 来源 3：直接配置在 resource 的 action 里
+    list: {
+      filter: {
+        col1: 'val3',
+      },
+      fields: ['col1', 'col2', 'col3', 'col4', 'col5'],
+      handler: async (ctx, next) => {
+        ctx.body = {
+          'action.resourceName': ctx.action.resourceName,
+          'action.resourceOf': ctx.action.resourceOf,
+          'action.actionName': ctx.action.actionName,
+          'action.params': ctx.action.params,
+        };
+        await next();
+      },
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/resource-actions/action-with-default-options.ts b/examples/app/resource-actions/action-with-default-options.ts
new file mode 100644
index 000000000..6acd36a46
--- /dev/null
+++ b/examples/app/resource-actions/action-with-default-options.ts
@@ -0,0 +1,54 @@
+/*
+# 带默认参数的 Action
+
+# 步骤
+
+Step 1:
+yarn run:example app/resource-actions/action-with-default-options start
+
+Step 2:
+curl http://localhost:13000/api/test:list
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.resource({
+  name: 'test',
+  actions: {
+    find: {
+      filter: {
+        field1: 'value1',
+      },
+      handler: async (ctx, next) => {
+        ctx.body = {
+          'ctx.action.params': ctx.action.params,
+        };
+        await next();
+      },
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/resource-actions/global-action.ts b/examples/app/resource-actions/global-action.ts
new file mode 100644
index 000000000..f00e96e80
--- /dev/null
+++ b/examples/app/resource-actions/global-action.ts
@@ -0,0 +1,68 @@
+/*
+# 使用全局 Action
+
+全局 action 可用于任意 resource 中
+
+# 步骤
+
+Step 1:
+yarn run:example app/resource-actions/global-action start
+
+Step 2: test:export 的 action.params 带 fields
+curl http://localhost:13000/api/test:export
+
+Step 3: test:import 有效
+curl http://localhost:13000/api/test:import
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.resourcer.registerActionHandlers({
+  async import(ctx, next) {
+    ctx.body = {
+      'ctx.action.params': ctx.action.params,
+    };
+    await next();
+  },
+  async export(ctx, next) {
+    ctx.body = {
+      'ctx.action.params': ctx.action.params,
+    };
+    await next();
+  },
+});
+
+app.resource({
+  name: 'test',
+  // 全局的 actions 如果有默认参数可以在 actions 里配置
+  actions: {
+    export: {
+      fields: ['field1', 'field2'],
+    },
+    // 如果没有默认参数，可以不配置，如 import action
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/resource-actions/simple.ts b/examples/app/resource-actions/simple.ts
new file mode 100644
index 000000000..8408c1f6f
--- /dev/null
+++ b/examples/app/resource-actions/simple.ts
@@ -0,0 +1,47 @@
+/*
+# 最简单的 resource actions
+
+# 步骤
+
+Step 1:
+yarn run:example app/resource-actions/simple start
+
+Step 2:
+curl http://localhost:13000/api/test:list
+*/
+import { Application } from '@nocobase/server';
+
+const app = new Application({
+  database: {
+    logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+    dialect: process.env.DB_DIALECT as any,
+    storage: process.env.DB_STORAGE,
+    username: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT as any,
+    timezone: process.env.DB_TIMEZONE,
+    tablePrefix: process.env.DB_TABLE_PREFIX,
+  },
+  resourcer: {
+    prefix: '/api',
+  },
+  plugins: [],
+});
+
+app.resource({
+  name: 'test',
+  actions: {
+    async list(ctx, next) {
+      ctx.body = 'test list';
+      await next();
+    },
+  },
+});
+
+if (require.main === module) {
+  app.runAsCLI();
+}
+
+export default app;
diff --git a/examples/app/single-app.ts b/examples/app/single-app.ts
index 14911da0d..74079365e 100644
--- a/examples/app/single-app.ts
+++ b/examples/app/single-app.ts
@@ -1,3 +1,14 @@
+/*
+# 最简单的单应用
+
+# 步骤
+
+Step 1:
+yarn run:example app/single-app start
+
+Step 2:
+curl http://localhost:13000/api/test:list
+*/
 import { Application } from '@nocobase/server';
 
 const app = new Application({
@@ -19,11 +30,13 @@ const app = new Application({
   plugins: [],
 });
 
+// 定义了一个 test 资源，并提供了相对应的 list 方法
 app.resource({
   name: 'test',
   actions: {
-    async list(ctx) {
+    async list(ctx, next) {
       ctx.body = 'test list';
+      await next();
     },
   },
 });
@@ -33,5 +46,3 @@ if (require.main === module) {
 }
 
 export default app;
-
-// http://localhost:13000/api/test:list
\ No newline at end of file
diff --git a/examples/database/collections/tree/adjacency-list.ts b/examples/database/collections/tree/adjacency-list.ts
new file mode 100644
index 000000000..152462202
--- /dev/null
+++ b/examples/database/collections/tree/adjacency-list.ts
@@ -0,0 +1,54 @@
+/*
+# 树结构设计 —— 邻接表
+
+yarn run:example database/collections/tree/adjacency-list
+*/
+import { Database } from '@nocobase/database';
+import { uid } from '@nocobase/utils';
+
+const db = new Database({
+  logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+  dialect: process.env.DB_DIALECT as any,
+  storage: process.env.DB_STORAGE,
+  username: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_DATABASE,
+  host: process.env.DB_HOST,
+  port: process.env.DB_PORT as any,
+  timezone: process.env.DB_TIMEZONE,
+  tablePrefix: `t_${uid()}_`,
+});
+
+db.collection({
+  name: 'categories',
+  tree: 'adjacency-list',
+  fields: [
+    {
+      type: 'string',
+      name: 'name',
+    },
+    {
+      type: 'string',
+      name: 'description',
+    },
+    {
+      type: 'belongsTo',
+      name: 'parent',
+      target: 'categories',
+      foreignKey: 'parentId',
+    },
+    {
+      type: 'hasMany',
+      name: 'children',
+      target: 'categories',
+      foreignKey: 'parentId',
+    },
+  ],
+});
+
+(async () => {
+  await db.sync();
+  await db.close();
+})();
+
+export default db;
diff --git a/examples/database/collections/tree/closure-table.ts b/examples/database/collections/tree/closure-table.ts
new file mode 100644
index 000000000..f9956c7fa
--- /dev/null
+++ b/examples/database/collections/tree/closure-table.ts
@@ -0,0 +1,50 @@
+/*
+# 树结构设计 —— 闭包表
+
+yarn run:example database/collections/tree/closure-table
+*/
+import { Database } from '@nocobase/database';
+import { uid } from '@nocobase/utils';
+
+const db = new Database({
+  logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+  dialect: process.env.DB_DIALECT as any,
+  storage: process.env.DB_STORAGE,
+  username: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_DATABASE,
+  host: process.env.DB_HOST,
+  port: process.env.DB_PORT as any,
+  timezone: process.env.DB_TIMEZONE,
+  tablePrefix: `t_${uid()}_`,
+});
+
+db.collection({
+  name: 'categories',
+  tree: 'closure-table',
+  fields: [
+    {
+      type: 'string',
+      name: 'name',
+    },
+    {
+      type: 'string',
+      name: 'description',
+    },
+    {
+      type: 'treeParent',
+      name: 'parent',
+    },
+    {
+      type: 'treeChildren',
+      name: 'children',
+    },
+  ],
+});
+
+(async () => {
+  await db.sync();
+  await db.close();
+})();
+
+export default db;
diff --git a/examples/database/collections/tree/materialized-path.ts b/examples/database/collections/tree/materialized-path.ts
new file mode 100644
index 000000000..00c889359
--- /dev/null
+++ b/examples/database/collections/tree/materialized-path.ts
@@ -0,0 +1,50 @@
+/*
+# 树结构设计 —— 路径枚举
+
+yarn run:example database/collections/tree/materialized-path
+*/
+import { Database } from '@nocobase/database';
+import { uid } from '@nocobase/utils';
+
+const db = new Database({
+  logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+  dialect: process.env.DB_DIALECT as any,
+  storage: process.env.DB_STORAGE,
+  username: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_DATABASE,
+  host: process.env.DB_HOST,
+  port: process.env.DB_PORT as any,
+  timezone: process.env.DB_TIMEZONE,
+  tablePrefix: `t_${uid()}_`,
+});
+
+db.collection({
+  name: 'categories',
+  tree: 'materialized-path',
+  fields: [
+    {
+      type: 'string',
+      name: 'name',
+    },
+    {
+      type: 'string',
+      name: 'description',
+    },
+    {
+      type: 'treeParent',
+      name: 'parent',
+    },
+    {
+      type: 'treeChildren',
+      name: 'children',
+    },
+  ],
+});
+
+(async () => {
+  await db.sync();
+  await db.close();
+})();
+
+export default db;
diff --git a/examples/database/collections/tree/nested-set.ts b/examples/database/collections/tree/nested-set.ts
new file mode 100644
index 000000000..0289fc39d
--- /dev/null
+++ b/examples/database/collections/tree/nested-set.ts
@@ -0,0 +1,50 @@
+/*
+# 树结构设计 —— 嵌套集
+
+yarn run:example database/collections/tree/nested-set
+*/
+import { Database } from '@nocobase/database';
+import { uid } from '@nocobase/utils';
+
+const db = new Database({
+  logging: process.env.DB_LOGGING === 'on' ? console.log : false,
+  dialect: process.env.DB_DIALECT as any,
+  storage: process.env.DB_STORAGE,
+  username: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_DATABASE,
+  host: process.env.DB_HOST,
+  port: process.env.DB_PORT as any,
+  timezone: process.env.DB_TIMEZONE,
+  tablePrefix: `t_${uid()}_`,
+});
+
+db.collection({
+  name: 'categories',
+  tree: 'nested-set',
+  fields: [
+    {
+      type: 'string',
+      name: 'name',
+    },
+    {
+      type: 'string',
+      name: 'description',
+    },
+    {
+      type: 'treeParent',
+      name: 'parent',
+    },
+    {
+      type: 'treeChildren',
+      name: 'children',
+    },
+  ],
+});
+
+(async () => {
+  await db.sync();
+  await db.close();
+})();
+
+export default db;
diff --git a/examples/index.md b/examples/index.md
new file mode 100644
index 000000000..71de952f2
--- /dev/null
+++ b/examples/index.md
@@ -0,0 +1,47 @@
+# 示例
+
+## Application
+
+- [最简单的单应用](./app/single-app.ts)
+- [支持多应用（子应用）](./app/multi-app.ts)
+- 配置 Resources 和 Actions
+  - [最简单的 resource actions](./app/resource-actions/simple.ts)
+  - [带默认参数的 Action](./app/resource-actions/action-with-default-options.ts)
+  - [使用全局 Action](./app/resource-actions/global-action.ts)
+  - [Action 参数的多来源合并](./app/resource-actions/action-merge-params.ts)
+  - 内置 Actions 的用法
+- [Collection 自动转 Resource](./app/collection2resource.ts)
+- [Association 自动转 Resource](./app/association2resource.ts)
+- Context
+  - [ctx.db 示例](./app/context/ctx.db.ts)
+  - [ctx.action 的重要参数示例](./app/context/ctx.action.ts)
+  - [ctx.action.mergeParams() 示例](./app/context/ctx.action.mergeParams.ts)
+  - [ctx.i18n & ctx.t() 示例](./app/context/ctx.i18n.ts)
+- 中间件
+  - [app.use 用法](./app/middleware/app.ts)
+  - [app.resourcer.use 用法](./app/middleware/resourcer.ts)
+  - [app.acl.use 用法](./app/middleware/acl.ts)
+- [ACL](./app/acl.ts)
+- [国际化多语言](./app/i18n.ts)
+- [自定义命令行](./app/custom-command.ts)
+- [编写一个最简单的插件](./app/custom-plugin.ts)
+- Application Migration
+  - [编写一个新的 Migration 文件](./app/migrations/add-migration.ts)
+- 编写 Application 测试用例
+  - [最简单的测试用例](./app/__tests__/app.test.ts)
+- 客户端 SDK（APIClient）示例
+  - [客户端常规请求 —— api.request()](./api-client/api.request.ts)
+  - [客户端资源请求 —— api.resource().action()](./api-client/api.resource.ts)
+
+## Database
+
+- 配置 Collections & Fields
+- 通过 Repository 增删改查数据
+- 通过 Model 增删改查数据
+- 关系数据的增删改查
+- 关系数据的关联操作
+- 扩展字段
+- 数据库事件
+- 数据库迁移
+
+## Client
diff --git a/examples/index.ts b/examples/index.ts
new file mode 100644
index 000000000..395e1c03e
--- /dev/null
+++ b/examples/index.ts
@@ -0,0 +1,14 @@
+import Database from '@nocobase/database';
+import Application from '@nocobase/server';
+
+const argv = process.argv;
+const path = argv.splice(2, 1).shift();
+const app = require(`./${path}`).default;
+
+if (app instanceof Application) {
+  app.runAsCLI(argv);
+}
+
+if (app instanceof Database) {
+  console.log('Table prefix: ', app.getTablePrefix());
+}
diff --git a/package.json b/package.json
index 19de3e4eb..cd08733fb 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "version:alpha": "lerna version prerelease --preid alpha --force-publish=* --no-git-tag-version -m \"chore(versions): publish packages %s\"",
     "release:force": "lerna publish from-package --yes",
     "release": "lerna publish",
-    "run:example": "ts-node-dev -r dotenv/config"
+    "run:example": "ts-node-dev -r dotenv/config -r tsconfig-paths/register ./examples/index.ts"
   },
   "resolutions": {
     "@types/react": "^17.0.0",
diff --git a/packages/core/acl/src/acl.ts b/packages/core/acl/src/acl.ts
index a604dce66..5260e617b 100644
--- a/packages/core/acl/src/acl.ts
+++ b/packages/core/acl/src/acl.ts
@@ -127,7 +127,7 @@ export class ACL extends EventEmitter {
     return this.configResources.includes(name);
   }
 
-  setAvailableAction(name: string, options: AvailableActionOptions) {
+  setAvailableAction(name: string, options: AvailableActionOptions = {}) {
     this.availableActions.set(name, new AclAvailableAction(name, options));
 
     if (options.aliases) {
diff --git a/packages/core/database/src/database.ts b/packages/core/database/src/database.ts
index 0a5108183..c035937e4 100644
--- a/packages/core/database/src/database.ts
+++ b/packages/core/database/src/database.ts
@@ -21,7 +21,7 @@ import { Collection, CollectionOptions, RepositoryType } from './collection';
 import { ImporterReader, ImportFileExtension } from './collection-importer';
 import * as FieldTypes from './fields';
 import { Field, FieldContext, RelationField } from './fields';
-import { Migrations } from './migration';
+import { MigrationItem, Migrations } from './migration';
 import { Model } from './model';
 import { ModelHook } from './model-hook';
 import extendOperators from './operators';
@@ -205,7 +205,7 @@ export class Database extends EventEmitter implements AsyncEmitter {
     });
   }
 
-  addMigration(item) {
+  addMigration(item: MigrationItem) {
     return this.migrations.add(item);
   }
 
diff --git a/packages/core/database/src/index.ts b/packages/core/database/src/index.ts
index 6b18d6ddf..811d04eda 100644
--- a/packages/core/database/src/index.ts
+++ b/packages/core/database/src/index.ts
@@ -1,4 +1,4 @@
-export { ModelCtor, Op, SyncOptions } from 'sequelize';
+export { DataTypes, ModelCtor, Op, SyncOptions } from 'sequelize';
 export * from './collection';
 export * from './database';
 export { Database as default } from './database';
diff --git a/packages/core/resourcer/src/__tests__/koa.test.ts b/packages/core/resourcer/src/__tests__/koa.test.ts
index 2cb2aaf58..1fc69ba87 100644
--- a/packages/core/resourcer/src/__tests__/koa.test.ts
+++ b/packages/core/resourcer/src/__tests__/koa.test.ts
@@ -206,7 +206,7 @@ describe('koa middleware', () => {
         sort: '-id',
       });
       expect(response.body).toMatchObject({
-        sort: '-id',
+        sort: ['-id'],
         filter: {
           $and: [
             { col1: 'val1', col2: 'val2' },
diff --git a/packages/core/resourcer/src/assign.ts b/packages/core/resourcer/src/assign.ts
index 6721b257e..fd78b19a8 100644
--- a/packages/core/resourcer/src/assign.ts
+++ b/packages/core/resourcer/src/assign.ts
@@ -32,6 +32,9 @@ function getKeys(target: any) {
 export const mergeStrategies = new Map<MergeStrategyType, MergeStrategyFunc>();
 
 mergeStrategies.set('overwrite', (_, y) => {
+  if (typeof y === 'string') {
+    y = y.split(',');
+  }
   return y;
 });
 
diff --git a/packages/core/server/src/__tests__/i18next.test.ts b/packages/core/server/src/__tests__/i18next.test.ts
index addd1a8b8..8bf94c990 100644
--- a/packages/core/server/src/__tests__/i18next.test.ts
+++ b/packages/core/server/src/__tests__/i18next.test.ts
@@ -49,7 +49,7 @@ describe('i18next', () => {
     });
     const response1 = await agent.get('/api/tests:get');
     expect(response1.text).toEqual('Hello');
-    const response2 = await agent.get('/api/tests:get').set('Accept-Language', 'zh-CN');
+    const response2 = await agent.get('/api/tests:get').set('X-Locale', 'zh-CN');
     expect(response2.text).toEqual('你好');
     const response3 = await agent.get('/api/tests:get?locale=zh-CN');
     expect(response3.text).toEqual('你好');
diff --git a/packages/core/server/src/helper.ts b/packages/core/server/src/helper.ts
index 170052f02..57c789115 100644
--- a/packages/core/server/src/helper.ts
+++ b/packages/core/server/src/helper.ts
@@ -55,7 +55,12 @@ export function registerMiddlewares(app: Application, options: ApplicationOption
     const i18n = app.i18n.cloneInstance({ initImmediate: false });
     ctx.i18n = i18n;
     ctx.t = i18n.t.bind(i18n);
-    const lng = ctx.get('X-Locale') || (ctx.request.query.locale as string) || ctx.acceptsLanguages().shift() || 'en-US';
+    const lng =
+      ctx.get('X-Locale') ||
+      (ctx.request.query.locale as string) ||
+      app.i18n.language ||
+      ctx.acceptsLanguages().shift() ||
+      'en-US';
     if (lng !== '*' && lng) {
       i18n.changeLanguage(lng);
     }