我有table
,其值由x
和y
定位。这些值保存在数据库中。我正在使用react dnd定位这些table
。
我现在要做的是一键保存所有表位。为此,我制作了如下代码..
constructor() {
super();
this.state = {
tables: []
}}
saveTables() {
const { state, dispatch, tables } = this.props;
this.state.tables.map((table) => {
const data ={
id: table.id,
x: table.x,
y: table.y,
}
dispatch(Actions.save(this.props.tables.channel, data));
})
}
<button onClick={this.saveTables}>Save</button>
因此,当安装组件时,我将表的所有信息都记录到this.state.tables
中。因此,对于saveTables()
函数,我要做的是通过映射this.state.tables
调度操作来为每个表保存x
和y
的位置。但是,它会触发TypeError: action is undefined
是否有可能像上面那样做?或者是否有其他方法可以一键保存所有表格数据?
提前致谢..
- 编辑完整错误
TypeError: action is undefined[Learn More] app.js:54241:1
routerMiddleware/</</< http://localhost:4000/js/app.js:54241:1
saveTables/< http://localhost:4000/js/app.js:73190:9
map self-hosted
saveTables http://localhost:4000/js/app.js:73184:7
bound saveTables self-hosted
bound bound saveTables self-hosted
ReactErrorUtils.invokeGuardedCallback http://localhost:4000/js/app.js:45316:7
executeDispatch http://localhost:4000/js/app.js:39166:5
executeDispatchesInOrder http://localhost:4000/js/app.js:39189:5
executeDispatchesAndRelease http://localhost:4000/js/app.js:38581:5
executeDispatchesAndReleaseTopLevel http://localhost:4000/js/app.js:38592:10
forEach self-hosted
forEachAccumulated http://localhost:4000/js/app.js:50930:5
EventPluginHub.processEventQueue http://localhost:4000/js/app.js:38795:7
runEventQueueInBatch http://localhost:4000/js/app.js:45345:3
ReactEventEmitterMixin.handleTopLevel http://localhost:4000/js/app.js:45356:5
handleTopLevelImpl http://localhost:4000/js/app.js:45438:5
TransactionImpl.perform http://localhost:4000/js/app.js:50185:13
ReactDefaultBatchingStrategy.batchedUpdates http://localhost:4000/js/app.js:45084:14
batchedUpdates http://localhost:4000/js/app.js:48223:10
ReactEventListener.dispatchEvent http://localhost:4000/js/app.js:45513:7
bound
答案 0 :(得分:2)
您可以映射需要保存的所有数据,然后发送操作(这样会更有效,因为您的应用只运行渲染例程一次)。
saveTables() {
const { dispatch, tables } = this.props;
const tableData = tables.map(table => ({
id: table.id,
x: table.x,
y: table.y,
});
dispatch(Actions.save(tables.channel, tableData));
}
tableData
应该是一个类似的数组:
[{id, x, y}, {id, x, y} ...]
当然,你必须修改动作/减速器来处理所有数据的数组。
至于您需要提供错误发生的代码(不仅仅是堆栈跟踪),但如果没有正在运行的示例,可能很难知道。