Why is Thunk-Redux turning an object into a string? - reactjs

Question

I've come across a strange issue with thunk-redux. I am writing a React-Redux app that calls a public API, and displays the data in a table. However, when I incorporated thunk middleware to handle the asynchronous API calls, my data is being stringified after the action is dispatched to the reducer.
index.js (action creator)
export const FETCHING_DATA = 'FETCHING_DATA';
export const FETCH_SUCCESS = 'FETCH_SUCCESS';
export const ERROR = 'ERROR';
export const getData = () => {
return {
type : FETCHING_DATA
}
}
export const getDataSuccess = (data) => {
return {
type : FETCH_SUCCESS,
payload: data
}
}
export const getDataFailure = () => {
return {
type : ERROR
}
}
export function searchCVE(cve){
const url = `${CVE_URL}api/cve/${cve}`;
return dispatch => {
dispatch(getData());
fetch(PROXY + url)
.then(blob => blob.json())
.then(data => {
console.log('Request: ', data);
dispatch(getDataSuccess(data))
})
.catch(e => {
console.log(e);
dispatch(getDataFailure(e.message))
});
}
}
data_reducer.js (reducer)
import {FETCHING_DATA ,FETCH_SUCCESS, ERROR } from '../actions/index.js';
const initialState = {
payload:[],
fetching: false,
error: false
}
export default function(state=initialState, action){
console.log('Got CVE: ', action);
switch (action.type){
case FETCHING_DATA: return {payload:[], fetching: true, ...state}
case FETCH_SUCCESS: return [action.payload, ...state]
case ERROR: return {payload:[], error: true, ...state}
}
return state;
}
As you can see in the index.js action creator, console.log('Request: ', data); displays the JSON object I want. However, when I {console.log('TEST: ' + this.props.cve)} in my table component, the console shows:
TEST: [object Object]
At no point in my app am I "stringifying" my data - why/where could thunk-redux be turning my data into a string? I thank the community for any insight it can provide.

Answer 1

At no point in my app am I "stringifying" my data - why/where could thunk-redux be turning my data into a string?
redux-thunk couldn't do that under no circumstances. It's deadly simple; all it's doing is processing function action in a different way.
The problem is that the object is being stringified by you, + addition operator coerces an object to a string:
{console.log('TEST: ' + this.props.cve)}
In case an object is expected to be displayed in the console, it should be:
{console.log('TEST: ', this.props.cve)}
Or it can be displayed in DOM:
<pre>{JSON.stringify(this.props.cve, null, 2)}</pre>