我在React中使用formik进行表单提交，但是，当我想 "PATCH "一些东西时，formik会推送整个对象，而不是被修改的字段，这是我的代码。
editProfile.js
import React, { useEffect } from 'react';
import { makeStyles, Grid, Typography, TextField, Button } from '@material-ui/core';
import { Formik, Form } from 'formik';
import * as Yup from 'yup';
import { useDispatch, useSelector } from 'react-redux';
import { updateUser } from '../actions';
import { useHistory } from 'react-router-dom';
import NavBar from './navBar';
const useStyles = makeStyles((theme) => ({
}));
const Validation = Yup.object().shape({
firstName: Yup
.string()
.min(2, 'Name is too short!')
.max(15, 'Name is too long!')
.notRequired(),
secondName: Yup
.string()
.min(2, 'Name is too short!')
.max(15, 'Name is too long!')
.notRequired(),
lastName: Yup
.string()
.min(2, 'Name is too short!')
.max(15, 'Name is too long!')
.notRequired(),
password: Yup
.string()
.min(6, 'Password too short')
.max(20, 'Password too long')
.notRequired(),
age: Yup
.number()
.positive('Age must not be negative')
.notRequired(),
bloodGroup: Yup
.string()
.max(3, 'Blood group can\'t greater than 3')
.notRequired(),
weight: Yup
.number()
.positive('Weight must be a positive number')
.notRequired(),
bmi: Yup
.number()
.positive()
.notRequired(),
leftEye: Yup
.number()
.max(6)
.positive()
.notRequired(),
rightEye: Yup
.number()
.max(6)
.positive()
.notRequired(),
doctorName: Yup
.string()
.max(15, 'Name is too long!')
.notRequired(),
doctorEmail: Yup
.string()
.email()
.notRequired(),
doctorPhone: Yup
.number()
.notRequired(),
specialist: Yup
.string()
.notRequired(),
address: Yup
.string()
.max(100, 'Too long address')
.notRequired(),
lastVisit: Yup
.date()
.notRequired(),
nextVisit: Yup
.date()
.notRequired(),
})
const EditProfile = () => {
const classes = useStyles();
const dispatch = useDispatch();
const user = useSelector(state => state.auth.user);
const isSignedIn = useSelector(state => state.auth.isSignedIn);
const history = useHistory();
useEffect(() => {
if (!isSignedIn) {
history.push('/')
}
}, [isSignedIn, history])
if (!user) {
return null;
} else {
return (
<React.Fragment>
<NavBar />
<Grid
container
direction='column'
justify='flex-start'
alignItems='flex-start'
className={classes.gridHome}
>
<Grid item xs={12} className={classes.gridContent}>
<Typography className={classes.title}>Medico</Typography>
</Grid>
<Grid item xs={12} className={classes.gridContent}>
<Typography className={classes.signUp}>Welcome {user.user.firstName ? user.user.firstName : null}!</Typography>
</Grid>
<Formik
initialValues={{
firstName: '',
secondName: '',
lastName: '',
password: '',
age: '',
bloodGroup: '',
weight: '',
leftEye: 1,
rightEye: 1,
bmi: 1,
doctorName: '',
doctorPhone: 0,
doctorEmail: '',
address: '',
specialist: '',
lastVisit: new Date(),
nextVisit: new Date(),
}}
validationSchema={Validation}
onSubmit={(values) => {
dispatch(updateUser(values))
}}
>
{({ errors, handleChange, touched }) =>
<Form style={{ width: '100%' }}>
<Grid container direction='row'>
<Grid item xs={12} className={classes.name}>
<Typography className={classes.signUp}>Name</Typography>
</Grid>
<Grid item md={4} xs={12} className={classes.inputGrid}>
<TextField
className={classes.inputFields}
error={errors.firstName && touched.firstName}
name='firstName'
autoComplete='on'
shrink='true'
variant='standard'
onChange={handleChange}
id='firstName'
label='First Name'
helperText={
errors.firstName && touched.firstName
? errors.firstName : null
}
/>
</Grid>
<Grid item md={4} xs={12} className={classes.inputGrid}>
<TextField
className={classes.inputFields}
error={errors.secondName && touched.secondName}
name='secondName'
autoComplete='on'
variant='standard'
onChange={handleChange}
id='secondName'
label='Middle Name'
helperText={
errors.secondName && touched.secondName
? errors.secondName : null
}
/>
</Grid>
<Grid item md={4} xs={12} className={classes.inputGrid}>
<TextField
className={classes.inputFields}
error={errors.lastName && touched.lastName}
name='lastName'
autoComplete='on'
variant='standard'
onChange={handleChange}
id='lastName'
label='Last Name'
helperText={
errors.lastName && touched.lastName
? errors.lastName : null
}
/>
</Grid>
<Grid item xs={12} className={classes.name}>
<Typography className={classes.signUp}>Password</Typography>
</Grid>
<Grid item md={6} xs={12} className={classes.inputGrid}>
<TextField
className={classes.inputFields}
error={errors.password && touched.password}
name='password'
type='password'
variant='standard'
onChange={handleChange}
id='password'
label='Password'
helperText={
errors.password && touched.password
? errors.password : null
}
/>
</Grid>
<Grid item xs={12} className={classes.name}>
<Typography className={classes.signUp}>Personal Information</Typography>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.age && touched.age}
name='age'
variant='standard'
onChange={handleChange}
id='age'
label='Age'
helperText={
errors.age && touched.age
? errors.age : null
}
/>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.bloodGroup && touched.bloodGroup}
name='bloodGroup'
variant='standard'
onChange={handleChange}
id='bloodGroup'
label='Blood Group'
helperText={
errors.bloodGroup && touched.bloodGroup
? errors.bloodGroup : null
}
/>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.weight && touched.weight}
name='weight'
variant='standard'
onChange={handleChange}
id='weight'
label='Weight(in Kg)'
helperText={
errors.weight && touched.weight
? errors.weight : null
}
/>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.bmi && touched.bmi}
name='bmi'
variant='standard'
onChange={handleChange}
id='bmi'
label='BMI'
helperText={
errors.bmi && touched.bmi
? errors.bmi : null
}
/>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.leftEye && touched.leftEye}
name='leftEye'
variant='standard'
onChange={handleChange}
id='leftEye'
label='Left Eye'
helperText={
errors.leftEye && touched.leftEye
? errors.leftEye : null
}
/>
</Grid>
<Grid item md={2} xs={6} className={classes.inputGrid} >
<TextField
className={classes.inputFields}
error={errors.rightEye && touched.rightEye}
name='rightEye'
variant='standard'
onChange={handleChange}
id='rightEye'
label='Right Eye'
helperText={
errors.rightEye && touched.rightEye
? errors.rightEye : null
}
/>
</Grid>
<Grid item xs={6} container justify='center' alignItems='center' className={classes.loginGrid}>
<Button
className={classes.button}
type='submit'
variant='contained'
>Submit</Button>
</Grid>
</Grid>
</Form>
}
</Formik>
</Grid>
</React.Fragment >
);
}
}
export default EditProfile;假设我只是想推送'secondName'为'PATCH'，而不是formik提交所有的字段，在'initialValues'中提到的.如何控制formik只提交该字段被改变.PS：我已经删除了一些字段，以缩短片段。
我认为这很简单...你只需要比较初始值和onSubmit处理程序中的值。我希望这段代码足以让你理解。
const getModifiedValues = (values, initialValues) => {
let modifiedValues = {};
if (values) {
Object.entries(values).forEach((entry) => {
let key = entry[0];
let value = entry[1];
if (value !== initialValues[key]) {
modifiedValues[key] = value;
}
});
}
return modifiedValues;
};
const initialValues = {
firstName: '',
secondName: '',
lastName: '',
password: '',
age: '',
bloodGroup: '',
weight: '',
leftEye: 1,
rightEye: 1,
bmi: 1,
doctorName: '',
doctorPhone: 0,
doctorEmail: '',
address: '',
specialist: '',
lastVisit: new Date(),
nextVisit: new Date(),
};
<Formik
initialValues={initialValues}
validationSchema={Validation}
onSubmit={(values) => {
// this function should return the only modified values.
const modifiedValues = getModifiedValues(values, initialValues);
dispatch(updateUser(modifiedValues))
}}
>
...
</Formik>
我找到了一个链接，在那里它已经被回答了。