Mongoose重复，模式键唯一

I want to make the key project unique across that collection but i cant getting this working, i found similar problem here.

我想让关键项目在该系列中独一无二，但我不能让这个工作，我在这里发现了类似的问题。

task.js

function make(Schema, mongoose) {

    var Tasks = new Schema({
        project: { type: String, index: { unique: true, dropDups: true }},
        description: String
    });

    mongoose.model('Task', Tasks);
}
module.exports.make = make;

test.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/rss');

var Schema = mongoose.Schema
  , ObjectId = Schema.ObjectId;

require('./task.js').make(Schema, mongoose);
var Task = mongoose.model('Task');
var newTask = new Task({
    project: 'Starting new project'
  , description: 'New project in node'
});
newTask.save(function(err) {
    if (err) console.log('Error on saving');
});

mongoose.disconnect();

When i run the app with node test.js, still creates duplicates.

当我使用节点test.js运行应用程序时，仍会创建重复项。

MongoDB shell version: 2.0.2
connecting to: rss
> db.tasks.find()
> db.tasks.find()
{ "project" : "Starting new project", "description" : "New project in node", "_id" : ObjectId("4f21aaa3d48d4e1533000001") }
{ "project" : "Starting new project", "description" : "New project in node", "_id" : ObjectId("4f21aaa4d9a8921a33000001") }
{ "project" : "Starting new project", "description" : "New project in node", "_id" : ObjectId("4f21aaa57ebeea1f33000001") }

// Edit still same problem, here's what i tried to do delete the db.tasks.drop() collection restart mongo sudo stop mongodb and start mongodb, ran the program again and still same problem, how does it allow duplicate data on index?

//编辑还是一样的问题，这里是我试图删除db.tasks.drop（）集合重启mongo sudo stop mongodb并启动mongodb，再次运行程序仍然存在同样的问题，它如何允许索引上的重复数据？

1 个解决方案

#1

The Schema object you're passing may not work correctly because you are nesting 'unique' attribute into 'index' attribute, try something like this (it works as intended) :

您传递的Schema对象可能无法正常工作，因为您将'unique'属性嵌套到'index'属性中，尝试这样的事情（它按预期工作）：

User = mongoose.model('User', new Schema({
    firstName:  {
        type:String,
        required: true,
    },
    lastName: {
        type:String,
        required: true,
    },
    email: {
        type:String,
        required: true,
        unique: true
    },
    address: String,
    phone: {
        type:String,
        required: true,
    },
    password:  {
        type:String,
        required: true,
        set: Data.prototype.saltySha1 // some function called before saving the data
    },
    role: String
},{strict: true}));

Or more specifically for your example :

或者更具体地说是你的例子：

var Tasks = new Schema({
    project: { 
        type: String, 
        unique: true,
        index: true
    },
    description: String
});

Note : I don't know what you're trying to do with the "dropDups" parameter, it doesn't seems to be in the mongoose documentation.

注意：我不知道你要用“dropDups”参数做什么，它似乎不在mongoose文档中。

#1