道具数据显示模型对话框中未定义

Question

我正在使用Material UI表和reactjs。我在一列中有一个按钮，而单击该按钮时，我必须获得一个模型对话框以及该行数据。

给出的波纹管是父组件 表.js

//Update button event
handleRepeatUpdate = event => {
this.refs.updaterepat.handleUpdateOpen();
let e = event;
this.setState({
selected_rowID: e.id,
selectEvent: e
});
};
//material table
<MaterialTable
title=""
columns={[
{ title: "User Name", field: "userName", lookup: this.state.users },
{
title: "Role",
field: "role",
value: this.state.userName,
lookup: {
Primary: "Primary",
Secondary: "Secondary",
Escallation: "Escallation",
Override: "Override "
}
},
{
title: "Start Date",
field: "startDate",
type: "datetime",
value: this.state.role
},
{
title: "End Date",
field: "endDate",
type: "datetime",
value: this.state.startDate
},
{
title: "Repeat",
field: "isrepeat",
type: "boolean",
value: this.state.isrepeat,
render: rowData => (
<Fragment>
<Button onClick={() => this.handleRepeatClick(rowData)}>
<RectangleIcon />
</Button>
<Button onClick={() => this.handleRepeatUpdate(rowData)}>
<EditIcon />
</Button>
<Button onClick={() => this.handleDeleteRepeat(rowData)}>
<DeleteIcon />
</Button>
</Fragment>
)
}
]}
data={this.state.data}
/>;
<RepeatUpdate ref="updaterepat" repeatrow = {this.state.selected_rowID} seleRow = {this.state.selectEvent}/>

波纹管我正在给 模型对话框页面 重复更新.js

import React, { Fragment } from "react";
import Button from "@atlaskit/button";
import Modal, { ModalTransition } from "@atlaskit/modal-dialog";
import style from "./style.css";
import { FieldTextStateless } from "@atlaskit/field-text";
import Form, { Field, FormFooter } from "@atlaskit/form";
import DropdownMenu, {
DropdownItemGroup,
DropdownItem
} from "@atlaskit/dropdown-menu";
import Select from "@atlaskit/select";
import FieldBase, { Label } from "@atlaskit/field-base";
import axios from "axios";
import { gridSize } from "@atlaskit/theme";
import {
DatePicker,
DateTimePicker,
TimePicker
} from "@atlaskit/datetime-picker";
import { RadioGroup } from "@atlaskit/radio";
const Ends = [
{ value: "Never", label: "Never" },
{ value: "On", label: "On" },
{ value: "After", label: "After" }
];
var Days = [];
for (let i = 1; i <= 31; i++) {
Days.push({
label: i,
id: i,
value: i
});
}
var weeknumber = [];
for (let j = 1; j <= 7; j++) {
weeknumber.push({
label: j,
value: j,
id: j
});
}
var monthnum = [];
for (let k = 1; k <= 12; k++) {
monthnum.push({
label: k,
value: k,
id: k
});
}
var afternum = [];
for (let i = 0; i <= 20; i++) {
afternum.push({
label: i,
value: i
});
}
//multiselect styling
const customStyles = {
container(styles) {
return { ...styles, width: "20%" };
}
};
const lookup = {
day: Days,
week: weeknumber,
month: monthnum,
select: []
};
export default class RepeatPage extends React.Component {
constructor(props) {
super(props);
this.state = {
isOpen: false,
repeatonevery: "",
startson: "",
endsonnever: "",
repeat: "",
repeatAfter: "",
dataValue: "select",
repeatson: [],
datetime: "",
timeform: "",
numval: "",
data: "",
selectdata: ""
};
}
//repeat select
onChange = ({ target: { value } }) => {
this.setState({ dataValue: value, repeat: value });
// console.log("repeat is:",value)
// console.log("onChange repeat",this.state.repeat)
};
// repeat on every
handleRepeatOn = e => {
e.persist();
this.setState({
repeatonevery: e.target.value,
data: this.props.respdata.id
});
console.log("repeats on :", this.state.repeatonevery);
};
//repeat starts on
handleStartOn = startson => {
this.setState({
startson
});
console.log("starts on :", startson);
};
handleTimeForm = timeform => {
this.setState({
timeform
});
console.log("timeForm", timeform);
};
handleEndChange = event => {
event.preventDefault();
this.setState({
endsonnever: event.target.value
});
console.log("handleEnd change", this.state.endsonnever);
};
handleSelect = numval => {
this.setState({
numval
});
console.log("select values", numval);
};
handleUpdateSubmit = e => {
e.preventDefault();
};
handleUpdateOpen = event => {
this.setState({
isOpen: true,
selectdata: this.props.repeatrow
// selctitem : this.props.seleRow
});
let schedulesdata = this.props.repeatrow;
let schedule_user = this.props.seleRow;
console.log("selectdata :", this.state.selectdata);
console.log(
"schedule row data",
this.props.repeatrow,
"selected row is",
this.props.seleRow
);
};
close = () => this.setState({ isOpen: false });
render() {
console.log("repeatrow ", this.props.repeatrow);
const { isOpen } = this.state;
let self = this;
const { dataValue } = this.state;
const options = lookup[dataValue];
return (
<div>
<div>
<ModalTransition>
{isOpen && (
<Modal heading="">
<Form onSubmit={data => console.log(data)}>
{({ formProps }) => (
<form {...formProps} name="text-fields">
<h2> Repeat</h2>
{/* <div className="row">  */}
<Field name="Repeat" defaultValue="" label="Repeat">
{({
fieldProps: { isRequired, isDisabled, ...others }
}) => (
<select
onChange={this.onChange}
value={this.state.repeat}
>
<option value="select">Select</option>
<option value="day">Day</option>
<option value="week">week</option>
<option value="month">Month</option>
</select>
)}
</Field>
<Field
name="Repeat"
defaultValue=""
label="Repeats on every"
>
{({
fieldProps: { isRequired, isDisabled, ...others }
}) => (
<select
onChange={this.handleRepeatOn}
value={this.state.repeatonevery}
>
{options.map(o => (
<option key={o.id}>{o.label}</option>
))}
</select>
)}
</Field>
<div className="row">
<Field name="start" defaultValue="" label="Starts On">
{({
fieldProps: { isRequired, isDisabled, ...others }
}) => (
<DateTimePicker
innerProps={{ style: { width: gridSize() * 20 } }}
onChange={this.handleStartOn}
value={this.state.startson}
/>
)}
</Field>
</div>
<Field name="end" defaultValue="" label="End">
{({
fieldProps: { isRequired, isDisabled, ...others }
}) => (
<div>
<div>
<label>
<input
type="radio"
value="never"
name="never"
style={{ marginLeft: "15px" }}
onChange={this.handleEndChange}
/>
Never
</label>
</div>
<div className="row">
<label>
<input
type="radio"
name="on"
style={{ marginLeft: "31px" }}
onChange={this.handleEndChange}
/>
on
</label>
<DateTimePicker
innerProps={{
style: { width: gridSize() * 20 }
}}
onChange={this.handleTimeForm}
value={this.state.timeform}
/>
</div>
<div className="row">
<label>
<input
type="radio"
value="after"
name="after"
style={{ marginLeft: "31px" }}
onChange={this.handleEndChange}
/>
After
</label>
<Select
className="single-select selectwidth"
classNamePrefix="react-select"
options={afternum}
value={this.state.numval}
onChange={this.handleSelect}
// styles = {customStyles}
/>
<label>Occurences</label>
</div>
</div>
)}
</Field>
<FormFooter>
<Button
type="submit"
appearance="primary"
onClick={this.handleUpdateSubmit}
>
Submit
</Button>
<Button className="BtnspaceP" onClick={this.close}>
Close
</Button>
</FormFooter>
</form>
)}
</Form>
</Modal>
)}
</ModalTransition>
</div>
</div>
);
}
}

我没有在 RepeatUpdate.js 组件中的 handleUpdateOpen(( 事件中获取 props 数据。 在使用componentWillReceiveProps时，我正在获取数据，但我想要该事件中的数据。

谢谢

Answer 1

我认为您应该将opened属性保留在 Table.js 状态中，并将其作为 prop 传递给RepeatUpdate而不是调用this.refs.updaterepat.handleUpdateOpen();，因为它只是一个糟糕的模式 - 当您可以使用 props 获取它时，使用 refs 做一些事情。

然后在 RepeatUpdate 中使用getDerivedStateFromProps处理 this.props，例如：

// for RepeatUpdate.js
static getDerivedStateFromProps(state, props) {
if(props.isOpen && props.isOpen !== state.isOpen) {
return {...state, isOpen: props.isOpen};
}
return state;
}

基本上我认为您在handleUpdateOpen中没有获得props，因为您丢失了上下文(this在调用this.refs.updaterepat.handleUpdateOpen()时未定义(。 若要避免，可以将 handleUpdateOpen 从箭头函数更改为函数声明，并在构造函数中绑定上下文：

constructor(props) {
super(props);
this.state = {
isOpen: false,
repeatonevery: "",
startson: "",
endsonnever: "",
repeat: "",
repeatAfter: "",
dataValue: "select",
repeatson: [],
datetime: "",
timeform: "",
numval: "",
data: "",
selectdata: ""
};
this.handleUpdateOpen = this.handleUpdateOpen.bind(this);
}
function handleUpdateOpen(){...}

之后this.props将可用