猫鼬:人口众多(人口众多) [英] Mongoose: deep population (populate a populated field)

问题描述

我有Category模型:

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

商品模型包含对Account model的引用.

Article model contains ref to Account model.

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

因此，使用填充的articles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([articles])的子字段(帐户)?这是我现在的操作方式:

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

我知道在这里进行了讨论:猫鼬:填充一个填充字段，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

猫鼬现在有了用于深度关联的新方法Model.populate:

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

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

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