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# 更新主机宏

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### 描述

`object usermacro.update(object/array hostMacros)`

此方法用于更新现有的主机宏.

::: noteclassic
此方法只有*Admin(管理员)* 和 *Super admin(超级管理员)* 用户可用.可以在用户角色设置中撤销调用该方法的权限.更多信息请查看 [User roles](/manual/web_interface/frontend_sections/administration/user_roles).
:::

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### 参数

`(object/array)` 需要更新的[Host macro properties](object#主机宏) .

每个主机宏必须定义 `hostmacroid` 参数, 其他参数均为可选的. 只有通过的属性才会被更新，其他属性保持不变.

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### 返回值

`(object)` 返回包含 `hostmacroids` 属性（其中包含被更新主机宏的ID）的对象.

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### 示例

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#### 更改一个主机宏的值

更改一个主机宏"public"的值.

请求:

```json
{
    "jsonrpc": "2.0",
    "method": "usermacro.update",
    "params": {
        "hostmacroid": "1",
        "value": "public"
    },
    "auth": "038e1d7b1735c6a5436ee9eae095879e",
    "id": 1
}
```

返回:

```json
{
    "jsonrpc": "2.0",
    "result": {
        "hostmacroids": [
            "1"
        ]
    },
    "id": 1
}
```

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#### Change macro value that was created by discovery rule

Convert discovery rule created "automatic" macro to "manual" and change its value to "new-value".

Request:

``` {.java}
{
    "jsonrpc": "2.0",
    "method": "usermacro.update",
    "params": {
        "hostmacroid": "1",
        "value": "new-value",
        "automatic": "0"
    },
    "auth": "038e1d7b1735c6a5436ee9eae095879e",
    "id": 1
}
```

Response:

``` {.java}
{
    "jsonrpc": "2.0",
    "result": {
        "hostmacroids": [
            "1"
        ]
    },
    "id": 1
}
```

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### 来源

CUserMacro::update() in
*ui/include/classes/api/services/CUserMacro.php*.

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