redux-form: Change specific field value on click

Question

How can I change value of specific field on event.

Example not working (Cannot read property 'firstname' of undefined)

onclick1() {
  this.props.fields.firstname.onChange("John")
}
render() {
 const { handleSubmit } = this.props;
 return (
  <div>
   <form onSubmit={handleSubmit(this.submit.bind(this))}>

      <Field
        name="firstname"
        component={TextField}
        label="first name"
      />
      <button onClick="this.onclick1()">Set name to John</button>

      <button type="submit">
        okay
      </button>
   </form>

This solution was proposed here but it is not working for me https://stackoverflow.com/a/36916183/160059

redux-form v7

Answer 1

I see some problems in your code:

<button onClick="this.onclick1()"> 

should be:

<button onClick={this.onclick1}>

and onclick1 should be somehow bound to the component. Besides, I usually use change method to set a field value. So I would change your code to something like:

class ComplexForm extends React.PureComponent {
  constructor(props) {
    super(props);
    this.onclick1 = this.onclick1.bind(this);
  }

  onclick1() {
    this.props.change("firstname", "John");
  }

  render() {
    const { handleSubmit } = this.props;
    return (
      <form onSubmit={handleSubmit}>
        <Field name="firstname" component="input" label="first name" />
        <button onClick={this.onclick1}>Set name to John</button>
      </form>
    );
  }
}

Note that I only rewrote some relevant part of your code and I'm using a standard input component cause I don't know how your TextField looks like. Check online demo here