Question

我创建了一个上传器来上传CSV文件，该文件会转换为json并发送到API。

如果数据无效，API将进行验证，并且返回我在调试器中看到的响应：

{"success":false,"errorCode":"880ddb963e40","errorMessage":"There are Ids which do not exist in system"}

我的用户界面输出一条通用消息，表明我的减速器存在如下所示的问题：

import {
    PUT_UPLOAD_CSV,
    PUT_UPLOAD_CSV_SUCCESS,
    PUT_UPLOAD_CSV_FAILURE
} from 'constants/BulkUploads/ActionTypes';

const INIT_STATE = {
    uploadLoader: false,
    uploadResponse: '',
    uploadError: ''
}

export default (state = INIT_STATE, action) => {
    switch (action.type) {
        case PUT_UPLOAD_CSV: {
            return {
                ...state,
                uploadLoader: true,
                uploadResponse: '',
                uploadError: ''
            }
        }
        case PUT_UPLOAD_CSV_SUCCESS: {
            return {
                ...state,
                uploadLoader: false,
                uploadResponse: 'CSV file uploaded successfully',
                uploadError: ''
            }
        }
        case PUT_UPLOAD_CSV_FAILURE: {
            return {
                ...state,
                uploadLoader: false,
                uploadResponse: '',
                uploadError: 'An error occurred uploading CSV file, please check the data and try again.'
            }
        }

        default:
            return state;
    }
}

我希望我的reducer uploadError句柄能够返回API errorMessage而不是我的默认API，以便使错误更具体，和/或将错误代码用作查找以显示适当的消息。

如果有人可以协助或指出一些文档。

更新-添加我的操作

import {
    PUT_UPLOAD_CSV,
    PUT_UPLOAD_CSV_SUCCESS,
    PUT_UPLOAD_CSV_FAILURE,
} from 'constants/BulkUploads/ActionTypes';


export const putUploadCSV = (payload) => {
    return {
        type: PUT_UPLOAD_CSV,
        payload
    };
};

export const putUploadCSVSuccess = (payload) => {
    return {
        type: PUT_UPLOAD_CSV_SUCCESS,
        payload
    }
};

export const putUploadCSVFailure = (payload) => {
    return {
        type: PUT_UPLOAD_CSV_FAILURE,
        payload
    };
};

我的index.js

{uploadError ?

{uploadError}
    :
{uploadResponse}
}

SAGA

function* putUploadCSVRequest(params) {
    try {
        const response = yield call(putUploadCSV, params.payload);
        yield put(putUploadCSVSuccess(response));
    } catch (error) {
        console.error(error);
        yield put(putUploadCSVFailure(error));
    }
}

Answer 1

您仅在给定功能中使用action.type。您可能会很好地使用另一个键，最好是类似action.data或action.payload之类的键来识别PUT_UPLOAD_CSV_FAILURE动作的不同类型，并相应地调整减速器。

要根据您的特定情况为您提供确切的解决方案，我可能需要了解您如何调度操作。

更新：

由于您使用的是操作创建者putUploadCSVFailure，因此可以将操作创建为

putUploadCSVFailure(response.errorMessage)

在HTTP客户端的捕获或响应中（axios？fetch？xhr？）

现在，有效负载为errorMessage，因此将reducer更新为

case PUT_UPLOAD_CSV_FAILURE: {
        return {
            ...state,
            uploadLoader: false,
            uploadResponse: '',
            uploadError: action.payload || 'An error occurred uploading CSV file, please check the data and try again.'
        }
    }

Answer 2

由于我不确定您如何调用该操作，因此我可以给您一个提示，以帮助您解决问题。

您可以将message参数传递给操作，然后在化简器中使用它。

行动电话：

this.props.onUploadError({type: PUT_UPLOAD_CSV_FAILURE, errorMessage: jsonData.errorMessage});

Reducer案例声明修改：

case PUT_UPLOAD_CSV_FAILURE: {
    return {
        ...state,
        uploadLoader: false,
        uploadResponse: '',
        uploadError: action.errorMessage
    }
}

Answer 3

您可以添加检查，以确保api发送错误，然后显示api错误或显示自定义错误。例如

const customError = 'An error occurred uploading CSV file, please check the data and try again.'
// in the reducer, assuming action.payload has response
uploadError: action.payload.errorMessage || customError

在Reducer中React / Redux处理API服务器错误以显示在UI上

3 个答案: