我对node.js和mongoose比较陌生,所以我一直在努力让人们为mongoose工作 . 根据官方mongoose文档,字符串可以用作参考:
注意:ObjectId,Number,String和Buffer可用作refs .
基于此,我一直在尝试填充String类型的字段,而不是ObjectId . 但是,每次我尝试这样做,我都会得到一个CastError:
CastError:对于路径“_id”处的值“testuser”,转换为ObjectId失败
如果它有帮助,这是我的代码:
/=============== In user.js ===============/
var UserSchema = new mongoose.Schema({
_username: { type: String, required: true, unique: true },
password: { type: String, required: true },
date_created: { type: Date, required: true, default: Date.now() },
last_accessed: { type: Date, required: true },
admin_access: { type: Boolean, required: true }
});
UserSchema.post('save', function(user) {
// Settings Model
var Settings = require('./settings');
var setting = new Settings.SettingsModel({
_user: user._username
});
setting.save(function(err) {
if (err) throw err;
console.log('Successfully created settings for user: ' + setting);
Settings.SettingsModel.findOne({ _user: user._username }, function(err, setting) {
Settings.SettingsModel.populate(setting, { path: '_user' }, function(err, setting) {
if (err) throw err;
console.log('User of setting is ' + setting._user);
});
});
});
});
/=============== In settings.js ===============/
var SettingsSchema = new mongoose.Schema({
_user: { type: String, ref: 'User', unique: true },
defaultCurrency: { type: String, default: 'USD', required: true },
secondaryCurrency: { type: String }
});
基本上,在创建用户之后创建用户的设置 .
任何帮助表示赞赏 . 谢谢!
1 回答
虽然您可以使用
ObjectId
以外的类型作为引用,但引用除了_id
之外不能引用任何字段 . 所以为了做到这一点,你必须将_id
的UserSchema
声明为String
,并将其值设置为您给出的相同值username
: