How can i push array of strings in redux reducers?

Question

I have used a reducer which stores the ipfs hashes as an array. I can't push array of values rather than that the existing hash is overwritten by the new hashes. The Reducer code is

const INITIAL_STATE = {
    fetching : false,
    fetched : false,
    ipfsHash : [],
    error : null
}
export default (state=INITIAL_STATE,action) =>{
        switch(action.type){
            case 'FILE_UPLOAD_START':
                return {
                    ...state,
                    fetching:true
                }
            case 'FILE_UPLOAD_SUCCESS':
                return {
                    ...state,
                    fetching : false,
                    fetched : true,
                    ipfsHash : action.payload // IPFS is replaced rather than pushing into the array
                }
            case 'FILE_UPLOAD_ERROR':
                return {
                    ...state,
                    fetching : false,
                    fetched : false,
                    error : action.payload
                }
            default:
                return {...state}
        }
    }

Any Idea for pushing the hashes into the array ????

CodinCat · Accepted Answer · 2017-03-23 10:28:50Z

4

You can use spread operator

return {
  ...state,
  fetching : false,
  fetched : true,
  ipfsHash : [...state.ipfsHash, ...action.payload]
}

or concat

return {
  ...state,
  fetching : false,
  fetched : true,
  ipfsHash : state.ipfsHash.concat(action.payload)
}

answered Mar 23, 2017 at 10:28

CodinCat

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