upload, parse and store door lock entries

client/src/store/reducers/doorLockReducers.js

@@ -7,7 +7,7 @@ import {
 const initialState = {
     pending: false,
     result: {},
-    error: '',
+    error: null,
 };
 
 export const doorLockData = (state, action) => {
@@ -18,15 +18,18 @@ export const doorLockData = (state, action) => {
       case UPLOAD_DOOR_LOCK_DATA_PENDING:
           return Object.assign({}, state, {
               pending: true,
+              error: null,
           });
       case UPLOAD_DOOR_LOCK_DATA_SUCCESS:
           return Object.assign({}, state, {
               pending: false,
               result: action.payload,
+              error: null,
           });
       case UPLOAD_DOOR_LOCK_DATA_FAILED:
           return Object.assign({}, state, {
               pending: false,
+              result: {},
               error: action.payload,
           });
       default: