具有依赖关系的多次调用 redux-thunk

Question

Question:

I use redux-thunk and I want to receive posts. To receive posts I need to get users. So I have doubts about my thunk, Is it right to get all the data in one thunk, if not how to split it into two thunks?

Thunk example:

export default group_id => {
  return async dispatch => {
    const users = await API.get(`/users?group_id=${group_id}`) // get users
    const posts = await axios.all([...getPosts(users)]) // get all posts by user ids
    dispatch(loadUsersAction(users))
    dispatch(loadPostsAction(posts))
  }
}

Answer 1

There might be several approaches depending of your requirements.

If the purpose is to load, initially users, and then their post, i would call firstly /users , and then dispatch another action creator to get their /posts . Because getting it all together would make your users waiting longer for something to change in the UI (ex: loading spinner), thus i would split these in two separate actions.

 export function getUsers(group_id) => { return async dispatch => { const users = await API.get(`/users?group_id=${group_id}`); dispatch(loadUsersAction(users)); return users; }; }; export function getPostForGroupUsers (group_id) => { return async dispatch => { const users = await dispatch(getUsers(group_id)); const posts = await axios.all([...getPosts(users)]); dispatch(loadPostsAction(posts)); return posts; } } // or just call users, dispatch and get them from store export function getPostForAllUsers () => { return async dispatch => { // this depends on your implementation const users = getFromReduxStore('users'); const posts = await axios.all([...getPosts(users)]); dispatch(loadPostsAction(posts)); return posts; } }

Maybe you can provide more details of your case, I then could give more precise response.