【发布时间】:2019-08-06 03:58:30
【问题描述】:
通过 Typescript 连接到 Elixir 频道时,我收到此错误
(
FunctionClauseError)ProjectName.ModuleName.handle_in/3中没有函数子句匹配
- 为什么会出现错误?
- 我该如何解决?
这是我的代码。
打字稿 chatView.tsx
import React, { Component } from 'react'
import { Socket} from 'phoenix'
type MyProps = { };
type MyState = { message: string };
export class Chat extends Component <MyProps, MyState> {
static readonly sockets = new Socket("ws://127.0.0.1:4000/socket");
static channel = Chat.sockets.channel("groups_forums:lobby", {})
constructor(props: any) {
super(props);
Chat.sockets.connect()
//bind
this.handleChange = this.handleChange.bind(this);
this.handleClick = this.handleClick.bind(this);
this.handleLoad = this.handleLoad.bind(this);
this.keyPress = this.keyPress.bind(this);
}
componentDidMount() {
window.addEventListener('load', this.handleLoad);
}
handleLoad() {
console.log("component loaded");
Chat.channel.join()
.receive("ok", (resp: any) => { console.log("Joined successfully", resp) })
.receive("error", (resp: any) => { console.log("Unable to join", resp) })
.receive("ignore", (resp: any) => {console.log("auth error", resp)})
Chat.channel.onClose((close: any) => { console.log("closing bye ", close) });
Chat.channel.on("new:msg", msg => {
scrollTo(0, document.body.scrollHeight)
})
}
handleChange(e:any) {
this.setState({ message: e.target.value });
}
keyPress(e:any){
if (e.keyCode == 13) {
Chat.channel.push("new:msg",{message: this.state.message},2000)
}
}
handleClick(e: any) {
e.preventDefault();
Chat.channel.push("new:msg", {message: this.state.message})
}
render() {
return (
<div style={{ position: "absolute", bottom: 0 }}>
<form>
<p className="form-group row">
<input style={{ marginLeft: 20, width: 200 }} defaultValue={''} onKeyPress={this.keyPress} onChange={ this.handleChange } id="message" type="text"></input>
<input style={{ marginLeft: 20, marginRight: 20 }} type="button" value="send" id="button" onClick={this.handleClick}></input>
</p>
</form>
</div>
)
}
}
export default Chat
灵药 phoenix user_socket.ex
channel "groups_forums:lobby", ChatSample.GroupsForumsChannel
groups_forums_channel.ex 中的模块ChatSample.GroupsForumsChannel 是默认的自动生成模板。
我想要完成的任务的简要总结是,应该将用户消息广播给连接到频道的所有成员。
【问题讨论】:
-
能否请您从 TS 的这堵墙中提取引起错误的部分(连接?)?
-
谢谢,终于找到错误了。它在我的 Elixir 代码中。
标签: reactjs typescript websocket elixir phoenix-framework