javascriptreactjsreduxreact-reduxredux-saga

single reducer for multiple async calls in react ,redux


I am calling single post request multiple times like below from a component in React js:

    Object.keys(data).map(account => {
        const accountRequest = {
            accountNo: account.accountNo,
            id : account.id
        }
        return this.props.requestAccountDetails(accountRequest)
    }

requestAccountDetails is a function written in const mapDispatchToProps in container:

    const mapDispatchToProps = (dispatch)  => {
        return {
            requestAccountDetails : (accountDetails)=> {
                dispatch(requestAccountDetailsInformation(accountDetails));
            }
        }
    }

requestAcountDetailsInformation is an action written in action creator which calls redux-saga which is called multiple times asynchronously depending on no of accounts. So, if say number of accounts is 5 , post request I am calling is 5 times asynchronously using redux-saga.

Issue is when my post request gets returned successfully, I am again calling success action which calls reducer and data is supplied to my component.But as the call is made 5 times and it is calling same success function and same reducer.It overwrites previous call result. Example: If my first request returns result, and second request returns result.My first request result is overwritten in reducer.

Can anyone help me how can I maintain result of all 5 requests in single reducer.


Solution

  • you need to add result in array rather than overwrite in it. let say you have state.

    const state = {
    accountDetails =[]
    }
    

    In reducer in success call you can push new data in accountDetails and update state.

      reducer(initialState=state, action)
        switch(action.type){
          ....
        case Authsuccess: return { ...initialState,
                                    accountDetails : [ 
                                    ...initialState.accounDetails, 
                                     action.payload.accountInfo
                                     ],
                                  }