我是react / redux的新手，但可以为我的应用程序实现一些简单的addProduct表单。 今天我尝试用Formik中的Basic demo替换它，但是我不明白我应该在哪里放置“调度”功能（我在任何地方都尝试过）。
可能是我以错误的方式使用连接？
我的新组件与Demo完全相同，只不过我用productName（以及其他附加字段）替换了电子邮件。但我无法理解如何将“值”从Formik传递到Redux商店。
我没有Formik的旧表单组件如下所示：
import React from 'react';
import { connect } from 'react-redux';
import { addProduct } from '../actions';
const AddProduct0 = ({ dispatch }) => {
let inputSKUNumber;
let inputProductName;
return (
<div>
<input
ref={(node) => {
inputSKUNumber = node;
}}
placeholder="SKU Number"
/>
<input
ref={(node) => {
inputProductName = node;
}}
placeholder="Product name"
/>
<button
onClick={() => {
dispatch(addProduct({ SKUNumber: inputSKUNumber.value, name: inputProductName.value }));
inputSKUNumber.value = '';
inputProductName.value = '';
}}
>
Add Product
</button>
</div>
);
};
const AddProduct = connect()(AddProduct0);
export default AddProduct;
我使用formik的新组件如下所示：
import React from 'react';
import { connect } from 'react-redux';
import { withFormik } from 'formik';
import Yup from 'yup';
import { addProduct } from '../actions';
import './helper.css';
// Our inner form component. Will be wrapped with Formik({..})
const MyInnerForm = (props) => {
const {
values,
touched,
errors,
dirty,
isSubmitting,
handleChange,
handleBlur,
handleSubmit,
handleReset,
} = props;
return (
<form onSubmit={handleSubmit}>
<label htmlFor="SKUNumber">SKU Number</label>
<input
id="SKUNumber"
placeholder="SKU Number"
type="number"
value={values.SKUNumber}
onChange={handleChange}
onBlur={handleBlur}
className={errors.SKUNumber && touched.SKUNumber ? 'text-input error' : 'text-input'}
/>
<div className="input-feedback">{touched.SKUNumber ? errors.SKUNumber : ''}</div>
<label htmlFor="productName">Product Name</label>
<input
id="productName"
placeholder="Product Name"
type="text"
value={values.productName}
onChange={handleChange}
onBlur={handleBlur}
className={errors.productName && touched.productName ? 'text-input error' : 'text-input'}
/>
<div className="input-feedback">{touched.productName ? errors.productName : ''}</div>
<button
type="button"
className="outline"
onClick={handleReset}
disabled={!dirty || isSubmitting}
>
Reset
</button>
<button type="submit" disabled={isSubmitting}>
Submit
</button>
<DisplayFormikState {...props} />
</form>
);
};
const EnhancedForm = withFormik({
mapPropsToValues: () => ({
SKUNumber: 12345678,
productName: 'Default Product',
}),
validationSchema: Yup.object().shape({
SKUNumber: Yup.number()
.max(99999999, 'SKU Number must be less than 8 digits')
.required('SKU Number is required!'),
productName: Yup.string()
.min(5, 'Product name must be longer than 5 symbols')
.max(50, 'Product name must be shorter than 50 symbols')
.required('Product name is required!'),
handleSubmit: (values, { setSubmitting }) => {
setTimeout(() => {
alert(JSON.stringify(values, null, 2));
setSubmitting(false);
}, 1000);
// dispatch(addProduct(values));
},
displayName: 'BasicForm', // helps with React DevTools
})(MyInnerForm);
export const DisplayFormikState = props => (
<div style={{ margin: '1rem 0' }}>
<h3 style={{ fontFamily: 'monospace' }} />
<pre
style={{
background: '#f6f8fa',
fontSize: '.65rem',
padding: '.5rem',
}}
>
<strong>props</strong> = {JSON.stringify(props, null, 2)}
</pre>
</div>
);
const AddProduct = connect()(EnhancedForm);
export default AddProduct;
P.S。如果有人在这里添加标签“formik”，请执行此操作。
答案 0 :(得分：8)
我还在formik页面上打开了一个问题。其中一位贡献者给了我答案。所有都与该代码一起使用：
handleLoginFormSubmit() {
// send axios request to controller and from controller to gRPC
axios.post('/loginUser', this.login)
.then((response) => {
this.userData = JSON.parse(response.data[0]);
this.$store.dispatch('loginUser',this.userData);
})
}
答案 1 :(得分：0)
import React from 'react';
import { connect } from 'react-redux';
import { addProduct } from '../actions';
/* AddProduct не совсем контейнер, он просто вызывает диспатч,
ему не нужен стор, поэтому мы можем создать коннект коротким путем:
AddProduct = connect()(AddProduct); */
const AddProduct = ({ addMyProduct }) => {
let inputSKUNumber;
let inputProductName;
return (
<div>
<input
ref={(node) => {
inputSKUNumber = node;
}}
placeholder="SKU Number"
/>
<input
ref={(node) => {
inputProductName = node;
}}
placeholder="Product name"
/>
<button
onClick={() => {
addMyProduct({ SKUNumber: inputSKUNumber.value, name: inputProductName.value });
inputSKUNumber.value = '';
inputProductName.value = '';
}}
>
Add Product
</button>
</div>
);
};
const mapDispatchToProps = dispatch => ({
addMyProduct: (params) => dispatch(addProduct(params))
});
export default connect(null, mapDispatchToProps)(AddProduct);
答案 2 :(得分：0)
您可以使用更高的变量或异步函数。较高的变量有点la脚但是可以使用。
let setSubmittingHigher;
// Our inner form component. Will be wrapped with Formik({..})
const MyInnerForm = (props) => {enter code here
.
.
.
handleSubmit(values, {props, setSubmitting}) {
setSubmittingHigher = setSubmitting;
.
.
.
const mapStateToProps = (state) => {
typeof setSubmittingHigher === 'function' && setSubmittingHigher(false);
return {}
};
const mapDispatchToProps = dispatch => ({
addMyProduct: (params) => dispatch(addProduct(params))
});
export default connect(mapStateToProps, mapDispatchToProps)(AddProduct);