使用Nodejs与Mongodb和Mongoose。
我刚刚发现,Mongoose/Mongodb将自动生成的_id字段保存为字符串,而不是ObjectId。以下是Mongodb shell输出和示例文档:
> db.users.count({_id: {$type: 7}})
2
> db.users.count({_id: {$type: 2}})
4266
> db.users.find({_id: {$type: 7}},{_id:1}).limit(1)
{ "_id" : ObjectId("55f7df6fdb8aa078465ec6ec") }
> db.users.find({_id: {$type: 2}},{_id:1}).limit(1)
{ "_id" : "558c3472c8ec50de6e560ecd" }
这4266个_id(字符串)来自以下代码:
var newUser = new ApiUser();
newUser.name = name;
newUser.link = link;
newUser.signupTime = new Date().getTime();
newUser.initialBrowser = initialBrowser;
newUser.save(function(err) {
if (err)
res.json(err);
else
res.json('success');
});
而这两个 _id(ObjectId)来自于以下代码:
var newUser = new User();
newUser.facebook.id = profile.id;
newUser.facebook.token = token;
newUser.name = profile.name.givenName + ' ' + profile.name.familyName;
if (profile.emails) {
newUser.facebook.email = (profile.emails[0].value || '').toLowerCase();
}
newUser.facebook.gender = profile.gender;
newUser.facebook.profilePic = profile.photos[0].value;
newUser.save(function(err) {
if (err)
return done(err);
return done(null, newUser);
});
User() 和 ApiUser() 都引用同一个模型。保存ObjectId的是使用Passport.js进行Facebook认证策略的一个。
更新:这是我的用户模式:
var mongoose = require('mongoose');
var bcrypt = require('bcrypt-nodejs');
var Schema = mongoose.Schema;
// define the schema for our user model
var userSchema = Schema({
name: String,
email: String,
link: Number,
location: String,
residence: String,
age: Number,
gender: String,
subject: String,
signupTime: Number,
finishTime: Number,
shared: String,
search: String,
shareFriend: String,
local : {
email : String,
password : String
},
facebook : {
id : String,
token : String,
email : String,
name : String,
gender : String,
profilePic : String
},
interestsSummary: [Number],
interests: [{name: String, iType: String}],
valuesSummary: [Number],
values: [{name: String}],
traitsSummary: [Number],
traits: [{name: String}],
bio: String,
friendInterests: Number,
friendValues: Number,
friendPersonality: Number,
surveyLength: String,
missedInfo: String,
anythingElse: String,
finalBrowser: String,
consented: Boolean
}, {collection: "users"});
// generating a hash
userSchema.methods.generateHash = function(password) {
return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
};
// checking if password is valid
userSchema.methods.validPassword = function(password) {
return bcrypt.compareSync(password, this.local.password);
};
// create the model for users and expose it to our app
module.exports = mongoose.model('User', userSchema);
问题在于我似乎无法根据字符串查询mongodb,这给我带来了麻烦:
ApiUser.findById(req.body.friend,{name:1},function(err,user) {
console.log(user);
})
除非我搜索一个具有正确_id的2个用户之一,否则这将返回null。Req.body.friend是_id,它是一个字符串。我该如何将所有文档的_id更改为ObjectId,或者查询具有字符串_id的现有文档?