Question

我的架构如下

Sectionschema

var SectionSchema = new Schema({
    name: String,
 documents : {
        type : [{
            type: Schema.ObjectId,
            ref: 'Document'
        }]
    }
}

}

DocumentSchema

var DocumentSchema = new Schema({
    name: String,
    extension: String,
    access: String, //private,public
    folderName : String,
    bucketName : String,
    desc: String
});

Api.js

exports.section = function(req, res, next, id) {  

    var fieldSelection = {
        _id: 1,
        name: 1,       
        documents : 1
    };

    var populateArray = [];
    populateArray.push('documents');

    Section.findOne({
        _id: id
    }, fieldSelection)
        .populate(populateArray)
        .exec(function(err, section) {
            if (err) return next(err);
            if (!section) return next(new Error('Failed to load Section ' + id));
            // Found the section!! Set it in request context.
            req.section = section;
            next();
    });
}

如果我走这条路，我有 'documents'对象是[]。但是，如果我删除，“populateArray.push（'documents'）;”然后我得到文件：['5adfsadf525sdfsdfsdfssdfsd'] - 一些对象Id（至少）

请让我知道我需要填充的方式。

感谢。

Answer 1

将您的查询更改为

Section.findOne({
        _id: id
    }, fieldSelection)
        .populate('documents.type')
        .exec(function(err, section) {
            if (err) return next(err);
            if (!section) return next(new Error('Failed to load Section ' + id));
            // Found the section!! Set it in request context.
            req.section = section;
            next();
    });

这是有效的。您需要提供填充路径。

Answer 2

如果您只是想要＆＃34;文件＆＃34;在您的架构中指向稍后将填充的ObjectID数组。那么你可以用它。

var SectionSchema = new Schema({
name: String,
documents : [{
        type: Schema.ObjectId,
        ref: 'Document'
    }]    
});

并使用以下内容填充

 Section.findOne({
        _id: id
    }, fieldSelection)
        .populate('documents')
        .exec(function(err, section) {
            if (err) return next(err);
            if (!section) return next(new Error('Failed to load Section ' + id));
            // Found the section!! Set it in request context.
            req.section = section;
            next();
    });

Mongoose填充问题 - 数组对象

2 个答案: