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我是nodejs的新手,并且在回调中挣扎。我有一个回调块,期望从一个子函数的值,但是,我无法理解为什么该值不会返回到父块 - user.getUser。帮助将不胜感激。无法获取回调函数以将值返回父函数
子功能
getUser(userEmail) {
logger.info('fetching details for user '+userEmail)
dynamoModel.get(userEmail, function(err, userModel){
if(err) logger.error(err);
logger.info(userModel);
return userModel;
});
}
回调
user.getUser(email, function(err, userModel){
logger.info('parent block->'+userModel);
});
输出
info: fetching details for user dhdhd
info: email=dhdhd, password=ttjtkt, lastLogin=1498963442595, loginVendor=local, createdAt=Sun Jul 02 2017 12:44:02 GMT+1000 (AEST), updatedAt=Sun Jul 02 2017 12:44:02 GMT+1000 (AEST)
info: fetching details for user dhdhd
另外,我不知道为什么到的getUser函数的调用是发生多occations - 如从多个日志条目eveident -
info: fetching details for user dhdhd