我的用户库具有以下用于注册的代码
function register {
// do some validation on lib level
//user is instance of user collection
user.save()
.then(function(error,records, numberOfRecords) {
// got any kind of error
if (error) {
next('fail',msg,{error_code : 510, exception : ex} )
return ;
}
next('success','good', records );
})
.catch(function(ex) {
var msg = ex.message;
error = ex
system.log.error(msg);
next('fail',msg,{error_code : 510, exception : ex} );
}).done();
}
在我的mongooes模式中,我实现了中间件
User.pre('save', function (next) {
// just checking error is available in catch schope or not
var err = new Error('I am doing some experiment on it');
next(err);
});
var Promise = require('bluebird');
var User = mongoose.model('User');
Promise.promisifyAll(User);
Promise.promisifyAll(User.prototype);
得到以下问题
TypeError: Object #<Promise> has no method 'catch'
at User.register (/server/core/modules/user.js:69:10)
at router.post.http.request (/server/routes/user.js:55:8)
at Layer.handle [as handle_request] (/node_modules/express/lib/router/layer.js:82:5)
at next (/node_modules/express/lib/router/route.js:110:13)
at Route.dispatch (/node_modules/express/lib/router/route.js:91:3)
at Layer.handle [as handle_request] (/node_modules/express/lib/router/layer.js:82:5)
at /node_modules/express/lib/router/index.js:267:22
at Function.proto.process_params (/node_modules/express/lib/router/index.js:321:12)
at next (/node_modules/express/lib/router/index.js:261:10)
at Function.proto.handle (/node_modules/express/lib/router/index.js:166:3)
at router (/node_modules/express/lib/router/index.js:35:12)
at Layer.handle [as handle_request] (/node_modules/express/lib/router/layer.js:82:5)
at trim_prefix (/node_modules/express/lib/router/index.js:302:13)
at /node_modules/express/lib/router/index.js:270:7
at Function.proto.process_params (/node_modules/express/lib/router/index.js:321:12)
at next (/node_modules/express/lib/router/index.js:261:10)
at /server/router.js:45:3
我的问题是::
如何解决这个问题?
如何从mongooes中间件捕获到我的lib函数的错误(捕获)?
看来您不是在使用Bluebird,而是使用mongoose promises(mpromise),它没有.catch
方法。
您可以通过解决此问题
user.saveAsync().then(…)
在确定User
模型后使用,Promise.resolve(user.save()).then(…)
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我来说两句