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POWhy mongoose replaces subdocuments with "[object Object]"?
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copied!<p>I'm encountering weird behavior with embedded docs and I don't know if I do something wrong or is it a bug.</p> <p>This is my model:</p> <pre><code>var mg = require('mongoose') , S = mg.Schema; var subject = new S({ name: String , properties: [{ name: String , value: String }] }); module.exports = mg.model('Subject',subject); </code></pre> <p>When I try to add a property, it somehow gets converted into <code>"[object Object]"</code>:</p> <pre><code> console.log(req.body); // --> { name: 'height', value: 120 } console.log(typeof req.body); // --> object ob.Subject.findByIdAndUpdate(req.params.id, {$push: {properties: req.body}}, function(err, doc) { if(err) throw err; res.send(doc); }); </code></pre> <p>The returned <code>doc</code> is:</p> <pre><code>{_id: '...', name: 'sss', properties:[ "[object Object]" ]} </code></pre> <p>I used mongo CLI to inspect the document in the database and put proper values in it. </p> <pre><code>//the document as seen in mongo CLI: { _id: '...', name: 'sss', properties: [ "[object Object]", {name: "aaa", value: "bar"} ] } </code></pre> <p>Then I tried this:</p> <pre><code>ob.Subject.findById(id, function(err, doc) { res.send(doc); } </code></pre> <p>And then the returned doc is:</p> <pre><code>{ _id: '...', name: 'sss', properties:[ "[object Object]", "[object Object]" ] } </code></pre> <p>I think that, what's happening is mongoose somehow converts the subdocument into this string. Moreover, I don't think that this is my, or <code>res.send()</code> fault because:</p> <ul> <li>I'm not using <code>toJson</code> or <code>toObject</code> explicitly, I don't handle JSON conversion at all</li> <li><code>res.send()</code> is not an issue because even if I <code>util.inspect</code> the value - it's the same</li> <li>invalid conversion seems to happen both at write and read via mongoose</li> </ul> <p>Have you ever encountered similar behavior? Is there a way around that?</p> <p>I just started with mongoose and don't have an idea how to fallback to mongodb native to update and fetch documents and check if this behavior persists (I doubt). </p> <p>Any helpful hints appreciated :)</p>

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