Node.js 如何使用'Q'与mongoose绑定'save'方法
说我在Node.js 如何使用'Q'与mongoose绑定'save'方法,node.js,mongoose,promise,q,Node.js,Mongoose,Promise,Q,说我在User.js var mongoose = require('mongoose'); var Q = require('q'); var userSchema = new mongoose.Schema({ phone: { type: Number, require: true, index: { unique: true } } }); module.exports = mongoose.model('User', userSch
User.js
var mongoose = require('mongoose');
var Q = require('q');
var userSchema = new mongoose.Schema({
phone: {
type: Number,
require: true,
index: {
unique: true
}
}
});
module.exports = mongoose.model('User', userSchema);
module.exports.findOne = Q.nfbind(module.exports.findOne.bind(module.exports));
module.exports.find = Q.nfbind(module.exports.find.bind(module.exports));
var mongoose = require('mongoose');
var Q = require('q');
var User = require('../User');
var connectionStr = "mongodb://localhost:27017/user-model-test";
mongoose.connect(connectionStr, function(error) {
if (error) {
throw(error);
}
console.log("Connect to MongoDB...");
var testuser = new User({
phone: 1008611,
});
testuser.save = Q.nfbind(testuser.save.bind(testuser));
testuser.save().then(function () {
return User.findOne({ phone: 1008611 }).then(function (user) {
console.log(user.phone);
mongoose.disconnect();
}, function (error) {
throw(error);
});
}, function (error) {
throw(error);
}).done();
});
和另一个文件testuser.js
var mongoose = require('mongoose');
var Q = require('q');
var userSchema = new mongoose.Schema({
phone: {
type: Number,
require: true,
index: {
unique: true
}
}
});
module.exports = mongoose.model('User', userSchema);
module.exports.findOne = Q.nfbind(module.exports.findOne.bind(module.exports));
module.exports.find = Q.nfbind(module.exports.find.bind(module.exports));
var mongoose = require('mongoose');
var Q = require('q');
var User = require('../User');
var connectionStr = "mongodb://localhost:27017/user-model-test";
mongoose.connect(connectionStr, function(error) {
if (error) {
throw(error);
}
console.log("Connect to MongoDB...");
var testuser = new User({
phone: 1008611,
});
testuser.save = Q.nfbind(testuser.save.bind(testuser));
testuser.save().then(function () {
return User.findOne({ phone: 1008611 }).then(function (user) {
console.log(user.phone);
mongoose.disconnect();
}, function (error) {
throw(error);
});
}, function (error) {
throw(error);
}).done();
});
注意,目前我使用的是testuser.save=Q.nfbind(testuser.save.bind(testuser))
绑定保存
,但我想在User.js
中执行,比如module.exports.find=Q.nfbind(module.exports.find.bind(module.exports))代码>,有什么办法可以做到吗
谢谢。如果你坚持Q,我会做如下事情:
User.create = function(data){
var u = new User(data);
u.save = Q.nfbind(testuser.save.bind(testuser));
// add other methods you want
return u;
};
但是,我想补充一点,如果您对所有其他Mongoose方法调用.exec()
,那么它们已经返回了承诺(因此.find(..).exec()
返回mpromise承诺)。也就是说,Mongoose已经提供了promise API,save
是唯一尚未包含的方法之一
知道这一点也很有益,因为它与Bluebird是一个单行程序,Bluebird有一个promisifyAll
函数,可以创建比Qs或Mongoose更容易调试、更快的承诺