## 获取年级列表
```
app('rpc.course')->call('apps.misc.grades',[]);
```
~~~[api]
apps.misc.editions
id=1
<<<
Array
{
"jsonrpc":"2.0",
"result":{
"1":"一年级",
"2":"二年级",
"3":"三年级",
"4":"四年级",
"5":"五年级",
"6":"六年级",
"7":"七年级",
"16":"学前"
},
"id":"0af96323cc284e61104517139f96e7e7"
}
<<<
error
Array
(
[error] => Array
(
[code] => -32602
[message] => Invalid params
[data] =>
)
)
~~~