嗨,我正在尝试从我的nodejs后端获取数据到angular。我在nodejs中得到了以下错误消息
Cannot read property 'friends' of null
at UserModel.findOne.select.lean.exec
如果我尝试在邮递员中使用,Api工作得很好。但在angular中使用时,我在nodejs中得到错误消息
服务器端代码为:
let findFriends = ()=>{
return new Promise((resolve, reject)=>{
UserModel.findOne({userId: req.body.userId || req.query.userId})
.select('-__v -_id -password')
.lean()
.exec((err, userFriends)=>{
console.log(userFriends.friends.length)
if(err){
logger.error(err.message, ' friendsController: getAllNonFriends, findFriends', 5)
let apiResponse = response.generate(true, `Failed to Find Friends`, 500, null)
reject(apiResponse)
}else {
if(userFriends.friends.length !== 0){
resolve(userFriends.friends)
}else {
resolve(userFriends)
}
}
})
})
} // end find requests
angular中的代码:
public allNonFriends: any = ()=>{
this.http.getNonFriendsList(this.currentUser).subscribe(
(apiResponse)=>{
console.log(apiResponse)
if(apiResponse.status === 200){
console.log(apiResponse.data)
} else {
console.log(apiResponse.message)
}
},
(err)=>{
console.log(err)
}
)
} // end all non friends
https://stackoverflow.com/questions/56365023
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