Can't access JSON object information React/Redux - json

Question

Feels like I'm missing something obvious here - but I can't figure out how to access my JSON data. I have a Container component:
class About extends Component {
componentDidMount(){
const APP_URL = 'http://localhost/wordpress/'
const PAGES_URL = `${APP_URL}/wp-json/wp/v2/pages`
this.props.fetchAllPages(PAGES_URL, 'about')
}
render(){
return (
<div>
<Header/>
<div className="bg">
<div className="home-wrapper">
<h1>AAAAABBBBBOOOOUUUUUT</h1>
<Counter/>
<AboutInfo />
</div>
</div>
<Footer/>
</div>
)
}
}
const mapDispatchToProps = (dispatch) => {
return bindActionCreators({ fetchAllPages }, dispatch)
}
export default connect(null, mapDispatchToProps)(About);
And a Smart component:
class AboutInfo extends Component {
render(){
console.log(this.props.page);
console.log(this.props.page.id);
return (
<div>
<h1>This is ID: {this.props.page.id}</h1>
</div>
)
}
}
const mapStateToProps = ({ page }) => {
return { page }
}
export default connect(mapStateToProps)(AboutInfo);
My action:
export const fetchAllPages = (URL, SLUG) => {
var URLEN;
if(!SLUG){
URLEN = URL
} else {
URLEN = URL + "?slug=" + SLUG
}
return (dispatch) => {
dispatch(fetchRequest());
return fetchPosts(URLEN).then(([response, json]) => {
if(response.status === 200){
if(!SLUG) {
dispatch(fetchPagesSuccess(json))
} else {
dispatch(fetchPageBySlugSuccess(json))
}
} else {
dispatch(fetchError())
}
})
}
}
const fetchPageBySlugSuccess = (payload) => {
return {
type: types.FETCH_PAGE_BY_SLUG,
payload
}
}
My reducer:
const page = (state = {}, action) => {
switch (action.type) {
case FETCH_PAGE_BY_SLUG:
console.log(action.paylod)
return action.payload
default:
return state
}
}
This gives me:
When I console.log(this.props.page) in my AboutInfo component, it prints the object, but when I print console.log(this.props.page.id) it gives me undefined. Why can't I print the JSON content? Thanks!

Answer 1

page is an array and hence this.props.page.id is undefined. You might want to access the first element in array in which case you would do
this.props.page[0].id
but you might also need to add a test, since before the response is available you will be trying to access page[0].id and it might break.
You could instead write
this.props.page && this.props.page[0] && this.props.page[0].id

Answer 2

Getting data from the store is async So you must adding loading varibale on your reducer
class AboutInfo extends Component {
render(){
if(this.props.loading) return (<div>loading</div>);
return (
<div>
<h1>This is ID: {this.props.page.id}</h1>
</div>
);
}
}
const mapStateToProps = ({ page, loading }) => {
return { page, loading }
}
on your action try returing
json.page[0]

Answer 3

That is because page is an array and the id is a property of its 1st element.
So use this.props.page[0].id
If the logged object in your screenshot is the this.props.page then you will need and additional .page as that is also a part of the object this.props.page.page[0].id