reactjs - Redux Form 提交空搜索值查询时出错
问题描述
我正在尝试从 Redux 表单中获取值并将它们传递给这样的操作: /action/index.js
export function getResult(values) {
const search = values.searchText;
const category = values.categoryList;
const URL = `https://localhost:44308/api/values?searchString=${search}&searchCat=${category}`;
const response = axios.get(`${URL}`);
return {
type: GET_RESULT,
payload: response
};
}
src/userIndex.jsx
import React, { Component } from 'react';
import SearchForm from './searchForm';
import ResultList from './resultList';
import { connect } from 'react-redux';
import { getResult } from '../../actions/index';
class UserIndex extends Component {
values = {
searchForm: {
searchText: '',
categoryList: ''
}
};
Submit = values => {
this.props.getResult(values);
};
render() {
return (
<div>
<SearchForm onSubmit={this.Submit} />
<ResultList />
</div>
);
}
}
function mapStateToProps(state) {
return { documents: state.documents };
}
export default connect(
mapStateToProps,
{ getResult }
)(UserIndex);
reducer_documents.jsx
import _ from 'lodash';
import { GET_RESULT } from '../actions/actionCreator';
const DocumentReducer = (state = {}, action) => {
switch (action.type) {
case GET_RESULT:
return _.mapKeys(action.payload.data, 'id');
default:
return state;
}
};
export default DocumentReducer;
我总是收到这个错误:
index.jsx:15 未捕获类型错误:无法读取未定义的属性“searchText”
12 | }
13 |
14 | export function getResult(values) {
> 15 | const search = values.searchText;
16 | const category = values.categoryList;
17 |
18 | const URL = `https://localhost:44308/api/values?searchString=${search}&searchCat=${category}`;
searchForm.jsx
import React, { Component } from 'react';
import { connect } from 'react-redux';
import CategoriesList from './categories_list';
import SearchText from './search_input';
import { reduxForm } from 'redux-form';
class SearchForm extends Component {
render() {
return (
<form className="form-inline" onSubmit={this.props.handleSubmit}>
<div className="input-group col-md-3">
<SearchText />
</div>
<div className="input-group col-md-3">
<CategoriesList />
</div>
<button type="submit" className="btn btn-primary">
Submit
</button>
</form>
);
}
}
SearchForm = reduxForm({
// a unique name for the form
form: 'searchForm'
})(SearchForm);
// export default SearchForm;
function mapStateToProps(state) {
return { ...state.values };
}
export default connect(
mapStateToProps,
{ reduxForm }
)(SearchForm);
类别列表.jsx
import _ from 'lodash';
import React, { Component } from 'react';
import { Field } from 'redux-form';
import { fetchCategories } from '../../actions';
import { connect } from 'react-redux';
class CategoriesList extends Component {
componentDidMount() {
this.props.fetchCategories();
}
renderCategoryList = field => {
return (
<select
className="form-control"
value={field.input.value}
onChange={value => field.input.onChange(value)}
>
{this.renderCategories()}
</select>
);
};
render() {
const renderList = _.map(this.props.categories, ctg => {
return (
<option key={ctg.id} value={ctg.id}>
{ctg.name}
</option>
);
});
return (
<Field name="categoryList" component="select" className="form-control">
<option />
{renderList}
</Field>
);
}
}
function mapStateToProps(state) {
return { categories: state.categories };
}
export default connect(
mapStateToProps,
{ fetchCategories }
)(CategoriesList);
搜索输入.jsx
import React, { Component } from 'react';
import { Field } from 'redux-form';
class SearchText extends Component {
renderSearchText = field => {
return <input type="text" className="form-control" {...field.input} />;
};
render() {
return <Field name="searchText" component={this.renderSearchText} />;
}
}
export default SearchText;
我尝试过设置 typeof 检查,但仍然无效。
如果我在 searchText 字段上书写或选择一个类别,则这些值会正确更新。问题可能是字段的未定义初始状态。
我该如何解决这个问题?应该在哪里为这些参数设置初始状态?谢谢你。
解决方案
尝试将具有所需属性的默认对象传递给 reducer 中的 state 参数。就像是:
function getResultReducer(state = {searchText: "", categoryList: ""}, action) {
...
}
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