猫鼬:深度人口(填充人口稠密的领域) [英] Mongoose: deep population (populate a populated field)

问题描述

我有 Category 模型:

Category:
    ...
    articles: [{type:ObjectId, ref:'Article'}]

文章模型包含对账户模型的引用.

Article model contains ref to Account model.

Article:
    ...
    account: {type:ObjectId, ref:'Account'}

因此，填充了 articles 的类别模型将是:

So, with populated articles Category model will be:

{ //category
    articles: //this field is populated
     [ { account: 52386c14fbb3e9ef28000001, // I want this field to be populated
         date: Fri Sep 20 2013 00:00:00 GMT+0400 (MSK),
         title: 'Article 1' } ],
    title: 'Category 1' }

问题是:如何填充已填充字段([文章])的子字段(帐户)?这是我现在的做法:

The questions is: how to populate subfield (account) of a populated field ([articles])? Here is how I do it now:

globals.models.Category
    .find
        issue : req.params.id
        null
        sort:
            order: 1
    .populate("articles") # this populates only article field, article.account is not populated
    .exec (err, categories) ->
        console.log categories

我知道这里讨论过:猫鼬:填充填充字段但没有找到了真正的解决方案

I know it was discussed here: Mongoose: Populate a populated field but no real solution was found

推荐答案

Mongoose 现在有一个新的方法 Model.populate 用于深度关联:

Mongoose has now a new method Model.populate for deep associations:

https://github.com/Automattic/mongoose/issues/1377#issuecomment-15911192

这篇关于猫鼬:深度人口(填充人口稠密的领域)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！