F_A_8_Test_app/src/reducers/admin/test/createTopics.js

import * as actionTypes from '../../../constants/admin';
import initialState from '../../initialState';

export default function topic(state = initialState.topicId, {payload, type, error}) {

    switch (type) { // payload.type -> type
        case actionTypes.CREATE_TOPICS_REQUEST: {
            return {
                ...state,
                isFetching: true,
                // payload
            }
        }
        case actionTypes.CREATE_TOPICS_REQUEST_SUCCESS: {
const {data:{topic}}=payload
            return {
                ...state,
                isFetching: false,
                topic
            }
        }
        case actionTypes.CREATE_TOPICS_REQUEST_FAILURE: {

            return {
                ...state,
                isFetching: false,
                error
            }
        }
        default: {
            return state;
        }
    }
}