相关疑难解决方法(0)

我想打电话ensureIndex给authorName,命令是什么,我应该把这个代码放在哪里？

var mongoose = require('mongoose');

// defines the database schema for this object
var schema = mongoose.Schema({
    projectName : String,
    authorName : String,
    comment : [{
        id : String,                                    
        authorName : String,
        authorEmailAddress : { type : String, index : true }    
    }]
});

// Sets the schema for model
var ProjectModel = mongoose.model('Project', schema);

// Create a project
exports.create = function (projectJSON) {
    var project = new ProjectModel({
        projectName : projectJSON.projectName,
        authorName : projectJSON.authorName,    

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