Set value in field in redux form

问题:

I have redux form having dropdown and text fields. On dropdown change i have to update the other fields. The other fields are using custom component example

So the structure is like. 1. component having form 2. Field component.

Now i googled and found few things to update the field but not able to do it. What i tried 1. Adding state in the field like below in value. Does not work.

<Field name="accountno" value="this.state.accountno" component={InputText} placeholder="Number" />

2. Tried disptach but not able to use it. Getting error for no dispatch i prop type

   this.props.dispatch(change('form', 'accountno', 'test value'));

3. Tried this.props.fields but same not fields in props type.

It should work using 2 or 3 but not able to find where to add those. Please let me know how can i use these or any other way.

回答1:

When using redux-form, you don't need to set the value directly into the field. You can use the method initialize to populate your form. Or initialValues as a property of the object passed to redux to map state to props. The other way is to set the values individually using the function change from redux-form. In order to make it to work, you need to wrap your component with connect from react-redux. It embeds the dispatch method in your props.

import React, { Component } from 'react';
import { reduxForm, Field, change } from 'redux-form';
import { connect } from 'react-redux';

class Form extends Component {
  componentDidMount() {
    this.props.initialize({ accountno: 'some value here' });
    // set the value individually
    this.props.dispatch(change('myFormName', 'anotherField', 'value'));
  }

  render() {
    return (
      <form onSubmit={...}>
        ...
        <Field name="accountno" component={InputText} placeholder="Number" />
        <Field name="anotherField" component={InputText} />
      </form>
    )
  }
}

Form = reduxForm({ 
  form: 'myFormName' 
})(Form);

export default connect(state => ({ 
  // alternatively, you can set initial values here...
  initialValues: {
    accountno: 'some value here'
  } 
}))(Form);

回答2:

Just came up against this issue as well. The solution is to use initialValues as in juliobetta's answer, however the key is to set the value to a variable, such as state.blah.

You then need to set enableReinitialize to true so that the fields get updated when the state changes:

export default connect(state => ({ 
  initialValues: {
    accountno: state.accountno,
  },
  enableReinitialize: true,
}))(Form);

Now, every time you change state.accountno, the form field will be updated.