react-admin - How to set input values based on another

I think i found the proper way of doing this. I moved the auto fill address function to a onChange event on the SimpleForm element and removed it from the CEP input. It works like a charm now. Here is the code:

Custom Address input

export default withStyles(styles)(  class CustomAddressInput extends React.Component {    render() {      return (        <div>          <div>            <TextInput label="CEP" source="cep" parse={parseCep} format={parseCep} validate={validateCEP}/>          </div>          <div>            <TextInput label="Endereco" source="address"/>            <SelectInput label="Estado" source="state" choices={stateList}/>            <TextInput label="Cidade" source="city"/>          </div>        </div>      );    }  });

And the Create Component

const autoFillAddress = (event)=>{  if(event.cep){    if(event.cep.length === 9){      endereco(event.cep).then((result)=>{        event.address = result.logradouro;        event.state = result.uf;        event.city = result.localidade;      });    }  }}...<Create {...props}>  <SimpleForm onChange={autoFillAddress}>    <div>      <TextInput label="Nome" source="name" validate={validateName}/>      <TextInput label="CPF/CNPJ" source="cpfcnpj" parse={parseCpfCnpj} format={parseCpfCnpj} validate={validateCpfCnpj}/>    </div>    <div className={classes.packTres, classes.fullInput}>      <TextInput label="Email" source="email"validate={validateEmail}/>      <TextInput label="Senha" source="password" type="password" validate={validatePassword}/>    </div>    <TextInput label="Telefone" source="phone" type="tel" parse={parsePhone} format={parsePhone} validate={validatePhone}/>    <CustomAddressInput />    <BooleanInput label="Pode criar outros usuários do sistema" source="canCreateUser" defaultValue={false}/>    <BooleanInput label="Pode gerenciar projetos" source="canCreateProjects" defaultValue={false}/>    <BooleanInput label="Pode visualizar honorários" source="canSeeFees" defaultValue={false}/>  </SimpleForm></Create>...