Reactjs React-Redux-未捕获类型错误:无法读取未定义的属性“setState”
这是新的 我一直在寻找答案和答案 我也在使用Redux。根据良好实践,我有一个容器地址容器及其组件地址 该货柜的地址如下—Reactjs React-Redux-未捕获类型错误:无法读取未定义的属性“setState”,reactjs,react-redux,Reactjs,React Redux,这是新的 我一直在寻找答案和答案 我也在使用Redux。根据良好实践,我有一个容器地址容器及其组件地址 该货柜的地址如下— import React, { Component, PropTypes } from 'react' import { connect } from 'react-redux' import { Field, change } from 'redux-form' import { Col, Panel, Row } from
import React, { Component, PropTypes } from 'react'
import { connect } from 'react-redux'
import { Field, change } from 'redux-form'
import { Col, Panel, Row } from 'react-bootstrap'
import Select from 'react-select'
import Address from './address'
import { ensureStateData, getSuburbs } from './actions'
import { CLIENT_FORM_NAME } from '../clients/client/client'
export class AddressContainer extends Component {
static contextTypes = {
_reduxForm: PropTypes.object.isRequired,
}
constructor(props, context) {
super(props, context)
this.state = {
selectedSuburb: null,
}
}
componentDidMount() {
this.props.ensureStateData()
}
// Manage asyncSelect for new data request - for suburbs.
handleSuburbSearch = (query) => {
const { addressData } = this.props
const companyStateId = addressData.companyStateId
if (!query || query.trim().length < 2) {
return Promise.resolve({ options: [] })
}
const queryString = {
query: query,
companyStateId: companyStateId,
}
return getSuburbs(queryString)
.then(data => {
return { options: data }
})
}
render() {
const {
initialValues,
addressData,
updatePostcodeValue,
} = this.props
//const { value } = this.state
const sectionPrefix = this.context._reduxForm.sectionPrefix
if (addressData.isLoading || !addressData.states.length) {
return (
<p>Loading</p>
)
}
if (addressData.error) {
return (
<p>Error loading data</p>
)
}
const companyStateId = addressData.companyStateId
// initialValues = {
// ...initialValues.Address=null,
// state: addressData.states.find(option => option.stateId === companyStateId),
// }
return (
<Address
initialValues={initialValues}
addressData={addressData}
handleSuburbSearch={this.handleSuburbSearch}
/>
)
}
}
const mapStateToProps = (state) => ({
initialValues: state.address,
companyStateId: state.companyStateId,
addressData: state.addressData,
})
const mapDispatchToProps = (dispatch) => ({
ensureStateData: () => dispatch(ensureStateData()),
getSuburbs: (values) => dispatch(getSuburbs(values)),
updatePostcodeValue: (postcode, sectionPrefix) => dispatch(change(CLIENT_FORM_NAME, `${sectionPrefix ? (sectionPrefix + '.') : ''}postcode`, postcode))
})
export default connect(mapStateToProps, mapDispatchToProps)(AddressContainer)
import React, { Component, PropTypes } from 'react'
import { connect } from 'react-redux'
import { Field, reduxForm, change } from 'redux-form'
import { Col, Panel, Row } from 'react-bootstrap'
import Select from 'react-select'
import FormField from '../formComponents/formField'
import TextField from '../formComponents/textField'
import StaticText from '../formComponents/staticText'
export const ADDRESS_FORM_NAME = "Address"
export const Address = (props) => {
const { addressData, handleSuburbSearch } = props
const { reset } = props
return (
<Panel header={<h3>Client - Address Details</h3>}>
<Row>
<Field component={TextField}
name="address1"
id="address1"
type="text"
label="Address Line 1"
placeholder="Enter street 1st line..."
fieldCols={6}
labelCols={3}
controlCols={9}
/>
<Field component={TextField}
name="address2"
id="address2"
type="text"
label="Address Line 2"
placeholder="Enter street 2nd line..."
fieldCols={6}
labelCols={3}
controlCols={9}
/>
</Row>
<Row>
<Field
component={props => {
const { input, id, placeholder, type } = props
const { fieldCols, labelCols, controlCols, label, inputClass } = props
// just the props we want the inner Select textbox to have
const { name, onChange } = input
const onStateChange = (state) => {
console.log('onStateChange', state)
onChange(state)
}
return (
<FormField
id={id}
label={label}
fieldCols={fieldCols}
labelCols={labelCols}
controlCols={controlCols}
inputClass={inputClass}
>
<Select
name={name}
onChange={onStateChange}
placeholder="Select state"
valueKey="id"
options={addressData.states}
labelKey="stateLabel"
optionRenderer={option => `${option.stateShortName} (${option.stateName})`}
value={input.value}
selectValue={Array.isArray(input.value) ? input.value : undefined}
/>
</FormField>
)
}}
name="state"
id="state"
label="State."
fieldCols={6}
labelCols={3}
controlCols={6}
/>
</Row>
<Row>
<Field
component={props => {
const { input, id, placeholder, type } = props
const { fieldCols, labelCols, controlCols, label, inputClass } = props
const { name, value, onChange, onBlur, onFocus } = input
const inputProps = {
name,
value,
onChange,
onBlur,
onFocus,
}
const onSuburbChange = (value) => {
console.log('onSuburbChange: ', value)
this.setState({ selectedSuburb: value }, () => {
input.onChange(value)
updatePostcodeValue(value ? value.postcode : null, sectionPrefix)
})
}
return (
<FormField
id={id}
label={label}
fieldCols={fieldCols}
labelCols={labelCols}
controlCols={controlCols}
inputClass={inputClass}
>
<Select.Async
{...inputProps}
onChange={onSuburbChange}
valueKey="id"
labelKey="suburbName"
loadOptions={handleSuburbSearch}
backspaceRemoves={true}
/>
</FormField>
)
}}
name="suburb"
id="AddressLocation"
label="Suburb."
fieldCols={6}
labelCols={3}
controlCols={9}
/>
</Row>
<Row>
<Field component={StaticText}
name="postcode"
id="postcode"
label="Postcode."
fieldCols={6}
labelCols={3}
controlCols={9}
/>
</Row>
</Panel>
)
}
Address.propTypes = {
handleSuburbSearch: PropTypes.func.isRequired,
}
const AddressForm = reduxForm({
form: ADDRESS_FORM_NAME,
})(Address)
export default AddressForm
您将注意到有一个console.log作为值。这将产生以下结果:
onSuburbChange:Object{id:6810,suburbName:Eaglehawk,邮政编码:3556,州:VIC}
我使用React Select作为异步下拉列表。这一切都有效。如果我选择一个选项,我会得到下拉选项,但选择一个,它会给我错误
我在这里使用react state作为选项,因为我不需要用它来更新redux-只需react state
看起来没问题,但我还是发现了错误。为什么会出现此错误以及如何修复此错误?此特定错误是由于组件是无状态功能组件,并且其中不能包含this.state对象或setState函数造成的。但是,更一般地说,您希望组件的状态和函数对子组件可用,但这是不可能的。在这种情况下,您希望通过对子对象调用setState来修改父对象的状态 在这种情况下,子React组件将只具有来自其父组件的状态/函数/属性,这些状态/函数/属性将作为道具显式传递给该组件。如果要更改组件的本地状态,必须在具有本地状态的组件上进行。如果您想让子组件触发父组件上的某种类型的函数调用,那么该函数必须作为道具传递给子组件,子组件可以调用它 如果我正确理解了您的代码,那么在更改表单字段时,您希望按以下顺序发生3件事情 将更新上选定的郊区状态。 将触发中Redux表单的onChange。 updatePostCode操作被触发。 如果正确,则需要将onSuburbChange移动到,并将其作为道具传递给。但是,您不能在内部调用Redux表单的onChange。因此,您可以使该函数期望收到一个回调函数,该函数将在状态更新后被触发。然后可以在子组件中定义回调,但在父组件中定义状态更改函数。只要您在父级上传递所需的道具,例如updatePostCode和sectionPrefix,您将获得金牌。下面是它的外观: 地址容器 地址
正如您所看到的,组件中不同的props变量之间存在命名冲突,因此我调用main props addressProps来避免这种情况。您正在为无状态功能组件设置状态,这就是为什么它会出现此错误。请详细说明。我不确定如何纠正这一点。我想我在容器中设置了状态,特别是在onSuburbChange的构造函数中。我该怎么解决这个问题。。
const onSuburbChange = (value) => {
console.log('onSuburbChange: ', value)
this.setState({ selectedSuburb: value }, () => {
input.onChange(value)
updatePostcodeValue(value ? value.postcode : null, sectionPrefix)
})
}
export class AddressContainer extends Component {
/* Everything else in this component */
onSuburbChange = (value, callback) => {
this.setState({ selectedSuburb: value }, callback);
}
render() {
/* Other stuff inside render */
return (
<Address
initialValues={initialValues}
addressData={addressData}
handleSuburbSearch={this.handleSuburbSearch}
onSuburbChange={this.onSuburbChange}
updatePostcodeValue={this.props.updatePostcodeValue}
sectionPrefix={sectionPrefix}
/>
);
}
}
export const Address = (addressProps) => {
return (
/* All other JSX */
<Field
component={props => {
const { input } = props;
const handleSuburbChange = (value) => {
addressProps.onSuburbChange(value, () => {
input.onChange(value);
addressProps.updatePostcodeValue(value ? value.postcode : null, addressProps.sectionPrefix)
});
}
return (
<Select.Async
onChange={handleSuburbChange}
/>
)
}}
);
}