React Axios to Rails Knock - ruby-on-rails

Question

I am trying to send a POST request from axios to a Rails API using the following function in the React frontend:
export function registerUser({ name, email, password }) {
var postdata = JSON.stringify({
auth: {
name, email, password
}
});
return function(dispatch) {
axios.post(`${API_URL}/user_token`, postdata )
.then(response => {
cookie.save('token', response.data.token, { path: '/' });
dispatch({ type: AUTH_USER });
window.location.href = CLIENT_ROOT_URL + '/dashboard';
})
.catch((error) => {
errorHandler(dispatch, error.response, AUTH_ERROR)
});
}
}
The Knock gem expects the request in the following format:
{"auth": {"email": "foo#bar.com", "password": "secret"}}
My current function seem to generate the correct format (inspecting the request in the browser devtools), but I'm getting the following error:
Uncaught (in promise) Error: Objects are not valid as a React child
(found: object with keys {data, status, statusText, headers, config,
request}). If you meant to render a collection of children, use an
array instead or wrap the object using createFragment(object) from the
React add-ons. Check the render method of Register.
class Register extends Component {
handleFormSubmit(formProps) {
this.props.registerUser(formProps);
}
renderAlert() {
if(this.props.errorMessage) {
return (
<div>
<span><strong>Error!</strong> {this.props.errorMessage}</span>
</div>
);
}
}
render() {
const { handleSubmit } = this.props;
return (
<form onSubmit={handleSubmit(this.handleFormSubmit.bind(this))}>
{this.renderAlert()}
<div className="row">
<div className="col-md-6">
<label>Name</label>
<Field name="name" className="form-control" component={renderField} type="text" />
</div>
</div>
<div className="row">
<div className="col-md-12">
<label>Email</label>
<Field name="email" className="form-control" component={renderField} type="text" />
</div>
</div>
<div className="row">
<div className="col-md-12">
<label>Password</label>
<Field name="password" className="form-control" component={renderField} type="password" />
</div>
</div>
<button type="submit" className="btn btn-primary">Register</button>
</form>
);
}
}

Answer 1

The error is caused by the following line in your code
errorHandler(dispatch, error.response, AUTH_ERROR)
The exception raised clearly explains that. Instead of setting error.response, try to use the actual data from error.response. E.g error.response.data. Also, you can try replacing the error.response with a string and see how that behaves, then reference the string you need from error.response.data.