Nodejs多列独特mongoose的组合

客观的

为两列创建唯一性

我尝试了什么

这是我的架构，

var mongoose = require('mongoose');

// location table Schema

var locationSchema = new mongoose.Schema({

    locationId: { type: String, required: true },
    stockingLocationId: { type: String, required: true},
    parentStockingLocationId: { type: String },
    stockingLocationDescription: { type: String },
    created: { type: Date, default: Date.now  },
    lastModified: { type: Date, default: Date.now },
    isActive: { type: Boolean , default : true },
    isDeleted: { type: Boolean , default : false }

});

两列是locationId and stockingLocationId.

I tried locationSchema.index({locationId:1, stockingLocationId:1}, { unique: true });

但不起作用，

有什么帮助吗？

在如下所示的字段周围添加单引号后，它对我有用

mySchema.index({'field1': 1, 'field2': 1}, {unique: true});