调整

public/react/src/modules/courses/signin/student/Signedinlist.js

@@ -240,7 +240,7 @@ class Signedinlist extends Component {
     ];
 
     return(
-      <React.Fragment>
+<div>
         <Row className={"mt20"}>
           <Col span={12}>
             <Row gutter={[{ xs: 8, sm: 16, md: 24, lg: 32 }, 20]}>
@@ -250,7 +250,7 @@ class Signedinlist extends Component {
                 <Select defaultValue="全部分班" className={"Signedinlistbox"} style={{ width: 167 }} onChange={this.handleChangegroup_ids}>
                   {attendanceslist&&attendanceslist.map((item,key)=>{
                     return(
-                      <Option value={item.id}>{item.name}</Option>
+                      <Option value={item.id} key={key}>{item.name}</Option>
                     )
                   })}
 
@@ -264,7 +264,7 @@ class Signedinlist extends Component {
                   {
                     state&&state.map((item,key)=>{
                       return(
-                        <Option value={item.id}>{item.name}</Option>
+                        <Option value={item.id} key={key}>{item.name}</Option>
                       )
                     })
                   }
@@ -301,7 +301,7 @@ class Signedinlist extends Component {
                       pageSize={this.state.limit}
                       total={this.state.members_count}></Pagination>
         </div>
-      </React.Fragment>
+</div>
 
     )
   }