如何使用此动作功能获取用户信息?

时间:2019-07-12 13:52:54

标签: reactjs firebase redux google-cloud-firestore firebase-authentication

我实际上正在开发一个小型React应用,我有一个操作要根据uid检查当前用户是否存在于Firestore集合“用户”中,然后获取用户的个人资料信息。 它实际上可以执行此操作,但是我无法在个人资料组件中使用它来显示它!

这是动作文件:

import 'firebase/firestore'
import firebase from 'firebase/app'

const getUser =()=>{ 
  return (dispatch)=>{
    firebase.auth().onAuthStateChanged(firebaseUser => {
      if(firebaseUser){
        firebase.firestore().collection("users").doc(firebaseUser.uid).get().then( doc => {
            const { displayName } = doc.data()
         //it works and it shows me on console the name i want
            console.log("display name in action: ",displayName)

            const currentUser = {
              uid: firebaseUser.uid,
              displayName
            }
            dispatch({
              type:'GET_USER',
              currentUser,
            })

        })
      }
    })
  }
}
export  default getUser ;

当我尝试将其记录在我的配置文件中时,它显示此错误“ typeError:undefined不是对象(正在评估'this.props.getUser()。currentUser')”:

console.log("getting current user: ", this.props.getUser().currentUser )

我希望向我显示displayName,但出现错误!

1 个答案:

答案 0 :(得分:1)

您实际上正在寻找减速器。动作处理程序并非旨在将数据返回到您的组件。行动的想法是将数据存储到减速器。

下面的代码假定您已将react-redux与应用程序正确连接。

src / actions / userAction.js

Setting.Controller

src / reducers / userReducer.js

import 'firebase/firestore'
import firebase from 'firebase/app'

export const getUser = () => {
    return (dispatch) => {
        firebase.auth().onAuthStateChanged(firebaseUser => {
            if (firebaseUser) {
                firebase.firestore().collection("users").doc(firebaseUser.uid).get().then(doc => {
                    const {displayName} = doc.data();

                    const currentUser = {
                        uid: firebaseUser.uid,
                        displayName
                    };

                    dispatch({
                        type: 'GET_USER',
                        payload: currentUser
                    });
                })
            }
        })
    }
};

src / reducers / index.js

const INITIAL_STATE = {
    data: {},
};

export default (state = INITIAL_STATE, action) => {
    switch (action.type) {
        case 'GET_USER':
            return {
                ...state,
                data: action.payload
            };
        default:
            return state;
    }
};

src / components / Example.js

import userReducer from "./userReducer";

export default {
    user: userReducer
};