How to #connect to async loaded data? - asynchronous

Question

I'm writing an app with React, Redux, react-redux, react-router, react-router-redux and redux-async-connect. The special part of the app is that all client-server communication is done over websockets.
My users can read/write several walls, that I store is a walls store with the following reducer and basic helper functions:
const LOAD = 'ws/wall/LOAD';
const LOAD_SUCCESS = 'estisia/wall/LOAD_SUCCESS';
const LOAD_FAIL = 'estisia/wall/LOAD_FAIL';
const ADD_MESSAGE = 'estisia/wall/ADD_MESSAGE';
const initialWallState = {
loaded: false,
messages: []
};
const initialState = {
walls: {}
};
function wall(state = initialWallState, action = {}) {
switch (action.type) {
... // omitted for brevity
default:
return state;
}
}
export default function walls(state = initialState, action = {}) {
if (typeof action.data === 'undefined' || typeof action.data.wallId === 'undefined') return state;
const newState = {
...state.walls,
[action.data.wallId]: wall(state.walls[action.data.wallId], action)
};
return {walls: newState};
}
export function isLoaded(wallId, globalState) {
return globalState.walls.wallId && globalState.walls.wallId.loaded;
}
export function load(wallId) {
return {
type: LOAD,
send: ['wall/messages/page', [wallId, 1]]
};
}
and I have a Wall container where the appropriate wallId is passed in by react-router, but can't figure out how to make the #connect call pass only the relevant wall data to the container. What should I do instead of the #connect meta-code below to get it working?
#asyncConnect([{
deferred: true,
promise: ({store: {dispatch, getState}, params}) => {
if (!isLoaded(params.wallId, getState())) {
return dispatch(loadWall(params.wallId));
}
}
}])
#connect(
state => ({
messages: state.wall[this.params.wallId].messages,
loading: state.wall[this.params.wallId].loading
}))
export default class Wall extends Component {
static propTypes = {
messages: PropTypes.array
}
... // omitted for brevity
}
How can I achieve redux-async-connect to help me out with the above case?