How can the Redux form render a Field of Arrays before the render?

Question

I'm trying to execute a very simple example with ReduxForm and I have two functions before the render, but one of the functions call another as a component props, but then it is undefined. I tried to bind the this but it still dont recognise it.

Here is my code:

import React, { Component } from 'react'
import { Field, FieldArray, reduxForm } from 'redux-form'

class Page4 extends Component {
  constructor(props) {
   super(props)
   this.simpleField.bind(this)
  }

  simpleField(field) {
  const { meta }  = field
  return (
    <div className='form-group'>
      <label>{field.label}</label>
      <input
        className='form-control'
        {...field.input}
      />
    </div>
  )
 }
  // This function cannot reach the simpleField component
  myFields(field) {
    let optiosArray = [
      {'label':'Option 1', 'value':'1'},
      {'label':'Option 2', 'value':'2'}
     ]
    return(
      optionsArray.map((option, key) => {
        <Field
          label= {option.label}
          value= {option.value}
          name={option.value}
          component={this.simpleField}
        />
      })
    )
  }

render() {
  return (
    <div>
      <FieldArray
        name='test'
        label='label'
        component={this.myFields}
      />
   </div>
  )  
 }
}

const validate = (value) => {
 const errors = ''
 return errors
}

export default reduxForm({
 validate,
 form: 'Page4'
})(Page4)

Answer 1

To access this.simpleFields, binding the this.myFields in the constructor is good enough.

 constructor(props) {
   super(props)
   this.myFields = this.myFields.bind(this)
  }

this.myFields = this.myFields.bind(this)

I think you are using the FieldArray incorrectly. I've modified the code so that it will give you an idea on how FieldArray should be used. Working jsFiddle here - https://jsfiddle.net/sherin81/4u3hk7kg/

class Page4 extends Component {
  constructor(props) {
   super(props)
   this.myFields = this.myFields.bind(this)
  }

   simpleField = (field) => {
    const { input: { value } } = field
        return (
        <div className='form-group'>
          <input type="text" name={field.input.name} onChange={field.input.onChange} value={value} />  
        </div>
      )
 }

  myFields({ fields }) {
        return (<div>{fields.map((option, key) => {
        return (<div key={key}>
          <Field
            name={option}
            component={this.simpleField}
          />
        </div>)
      })}</div>)
    }

render() {
  return (
    <div>
      <FieldArray
        name='listOfTextFields'
        component={this.myFields}
      />
   </div>
  )  
 }
}

const validate = (value) => {
 const errors = ''
 return errors
}

const MyTextFields = reduxForm({
 validate,
 form: 'Page4'
})(Page4)

And when calling the component, you should do the following.

<MyTextFields initialValues={{ listOfTextFields: [ 'Text 1','Text 2' ] }}/>