如何在一次尝试中捕获两个等待的错误答案

【问题标题】：How to catch error seperate for two await within one try catch如何在一次尝试中捕获两个等待的错误
【发布时间】：2020-07-28 05:15:07
【问题描述】：

我有一个函数，在 Redux 操作的一个 try catch 块中运行两个等待承诺。我只是发现添加新项目的错误。 如果我想捕获参与者添加的错误，我该怎么办？ 添加参与者功能仅在创建新项目时运行，并且一旦成功，参与者可以获得新创建的项目ID，这就是我将这两个 await 放在一起的原因。

const handleProjectParticipant = async (project, participant) => async (dispatch) => {
    try {
        const resultProject = await createNewProject(project)
        dispatch({ type: PROJECT_ADD, payload: resultProject })
        const newProject_id = resultProject.id
        participant.project_id = newProject_id
        const resultParticipant = await addParticipant(participant)
        dispatch({ type: PARTICIPANT_ADD, payload: resultParticipant })
    }
    catch(e) {
        dispatch({ type: PROJECT_ADD_FAIL, payload: e})
        //want to catch error for add participant
        //dispatch({ type: PARTICIPANT_ADD_FAIL, payload: e})
    }
}

【问题讨论】：

标签： javascript async-await react-redux try-catch

【解决方案1】：

你可以在第一个嵌套另一个 try/catch：

const handleProjectParticipant = async (project, participant) => async (dispatch) => {
    try {
        const resultProject = await createNewProject(project)
        dispatch({ type: PROJECT_ADD, payload: resultProject })
        const newProject_id = resultProject.id
        participant.project_id = newProject_id
        try {
            const resultParticipant = await addParticipant(participant)
            dispatch({ type: PARTICIPANT_ADD, payload: resultParticipant })
        } catch(e) {
            dispatch({ type: PARTICIPANT_ADD_FAIL, payload: e})
        }
    }
    catch(e) {
        dispatch({ type: PROJECT_ADD_FAIL, payload: e})
    }
}

或者你可以这样做：

const handleProjectParticipant = async (project, participant) => async (dispatch) => {
    let handleError = (e) => dispatch({ type: PROJECT_ADD_FAIL, payload: e})
    try {
        const resultProject = await createNewProject(project)
        dispatch({ type: PROJECT_ADD, payload: resultProject })
        const newProject_id = resultProject.id
        participant.project_id = newProject_id
        handleError = (e) => dispatch({ type: PARTICIPANT_ADD_FAIL, payload: e})
        const resultParticipant = await addParticipant(participant)
        dispatch({ type: PARTICIPANT_ADD, payload: resultParticipant })
    }
    catch(e) {
        handleError(e)
    }
}

【讨论】：

没有巢的任何方式？