使用mongoose在mongodb模式中使用ensureIndex

问题描述

我想在 authorName 上调用 ensureIndex ，命令是什么以及此代码应该在哪里把它？

I would like to call ensureIndex on the authorName, what is the command and where in this code should I put it?

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,

        comment : [{
            id : projectJSON.comments.id,
            authorName : projectJSON.comments.authorName,
            authorEmailAddress : projectJSON.authorEmailAddress
        });

        project.save(function(err) {
            if (err) {
                console.log(err);
            } else{
                console.log("success");
            }
        });
    });
}

推荐答案

你不打电话 ensureIndex ，您指明该字段应该在您的架构中编入索引，如下所示：

You don't call ensureIndex directly, you indicate that field should be indexed in your schema like this:

var schema = mongoose.Schema({
  projectName : String,
  authorName : { type: String, index: true }
});

根据该定义，Mongoose将调用 ensureIndex 当您通过 mongoose.model 电话注册模型时为您服务。

Based on that definition, Mongoose will call ensureIndex for you when you register the model via the mongoose.model call.

查看 ensureIndex 调用Mongoose正在进行的调用，通过在代码中添加以下内容来启用调试输出：

To see the ensureIndex calls that Mongoose is making, enable debug output by adding the following to your code:

mongoose.set('debug', true);

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