# 读取/修改用户权限

你可以在控制台中创建角色、为角色配置权限和为角色指派用户（配置方式请参考：[配置用户角色和权限](https://learn.authing.cn/authing/advanced/roles)），然后使用本页的 API 根据用户 ID  在程序中读取或修改用户角色和权限。

## 获取用户权限和角色

**Authing.queryPermissions(userId)**

* **参数:**
  * `{String} userId`
* **使用方法:**
  * ```javascript
    Authing.queryPermissions('USER_ID');
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const groupList = await authing.queryPermissions('USER_ID')
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "totalCount": 2,
      "list": [
        {
          "group": {
            "name": "管理员",
            "permissions": "{\"routes\": \"/api/v1\"}"
          }
        },
        {
          "group": {
            "name": "读者",
            "permissions": ""
          }
        }
      ]
    }
    ```

## 获取应用下所有角色

**Authing.queryRoles(options)**

* **参数:**
  * `{Object} options`
    * page: 第几页，选填，默认为 1
    * count: 总数，选填，默认为 10
* **使用方法:**
  * ```javascript
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const rolesList = await authing.queryPermissions({
        page: 1,
        count: 10
      })
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "totalCount": 1,
      "list": [
        {
          "_id": "5ca5c3a88a61c7304fb1299a",
          "name": "管理员",
          "client": "5c9c659cb9440b05cb2570e6",
          "descriptions": null,
          "createdAt": "Thu Apr 04 2019 16:43:20 GMT+0800 (CST)",
          "permissions": "{\"routes\": \"/api/v1\"}"
        }
      ]
    }
    ```

## 创建用户角色

**Authing.createRole(options)**

* **参数:**
  * `{Object} options`
    * name: 角色名称，必填
    * descriptions: 角色描述，必填
* **使用方法:**
  * ```javascript
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const rolesList = await authing.createRole({
        name: '测试角色',
        descriptions: '测试角色的描述'
      })
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "_id": "5ca5c5dd8a61c7ffbfb129a9",
      "name": "测试角色",
      "client": "5c9c659cb9440b05cb2570e6",
      "descriptions": "测试角色的描述"
    }
    ```

## 修改角色权限

**Authing.updateRolePermissions(options)**

* **参数:**
  * `{Object} options`
    * name: 角色名称，必填
    * roleId: 角色 ID，必填
    * permissions: 角色权限，必填。输入自定义的权限字符串，可以是 JSON 或数组；之后可以通过 API 获取此处设置的权限既而实现自己的业务逻辑。
* **使用方法:**
  * ```javascript
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const rolesList = await authing.updateRolePermissions({
        name: '测试角色',
        roleId: '5ca5c5dd8a61c7ffbfb129a9',
        permissions: 'route:all'
      })
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "_id": "5ca5c5dd8a61c7ffbfb129a9",
      "name": "测试角色",
      "client": "5c9c659cb9440b05cb2570e6",
      "descriptions": "测试角色的描述",
      "permissions": "route:all"
    }
    ```

## 指派用户到某角色

**Authing.assignUserToRole(userId)**

* **参数:**
  * `{String} userId`
* **使用方法:**
  * ```javascript
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const rolesList = await authing.assignUserToRole('USER_ID')
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "totalCount":3,
      "list":[
        {
          "_id":"5d21bb48ec626c076d82c31a",
          "client":{
            "_id":null,
          },
          "user":{
            "_id":null,
          },
          "createdAt":"Sun Jul 07 2019 17:28:40 GMT+0800 (CST)",
        }
      ],
    }
    ```

## 将用户从某角色中移除

**Authing.removeUserFromRole(options)**

* **参数:**
  * `{Object} options`
    * roleId: 角色 ID，必填
    * user: 要指派的用户 ID，必填
* **使用方法:**
  * ```javascript
    (async function() {
      const authing = await new Authing({
        clientId: 'your_client_id',
        timestamp: Math.round(new Date() / 1000),
        nonce: Math.ceil(Math.random() * Math.pow(10, 6)),
      });
      
      const rolesList = await authing.removeUserFromRole({
        user: '5ca332d265520f3d751b0f63',
        roleId: '5ca5c5dd8a61c7ffbfb129a9',
      })
        .catch((error) => { ... });;
    })();
    ```
* **返回数据:**
  * ```javascript
    {
      "_id": null,
      "client": null,
      "group": null,
      "user": null
    }
    ```
