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POHow to put embedded document from one document into another document using Mongoose?
 

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  1. POHow to put embedded document from one document into another document using Mongoose?
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    <p>What I'm trying to do should be straight forward but for some reason I'm having real difficulties figuring this out. I have the following Mongoose schemas (simplified).</p> <pre><code>var Status = new Schema({ name : { type: String, required: true }, description : { type: String } }); var Category = new Schema({ statuses : [Status], // contains a list of all available statuses // some other attributes }); var Book = new Schema({ statuses : [Status], // preferably this would not be an array but a single document, but Mongoose doesn't seem to support that // some other attributes }); </code></pre> <p>Now, I want to do the following:</p> <ol> <li>Retrieve the Category document</li> <li>Find a particular embedded Status document (based on request param)</li> <li>Assign that particular embedded Status document to a particular Book document. I want to replace the existing Book status as at any given time there should only be one status set for a book.</li> </ol> <p>Here is what I'm currently doing:</p> <pre><code>mongoose.model('Category').findOne({_id: id}, function(err, category){ if(err) next(err); var status = category.statuses.id(statusId); // statusId available via closure book.statuses[0] = status; // book available via closure; trying to replace the existing status here. book.save(function(err){ if(err) next(err); next(); }); }); </code></pre> <p>The above seems to run fine and I don't get any errors. However, the new status is not saved to the document. Next time I output the updated Book document, it will still have the old status. I debugged this and the find() methods as well as setting the status seems to be fine. </p> <p>The only thing I can think of right now is that somehow the status value I'm assigning is not in the right format to be saved with Mongoose. Although, I would expect some kind of error message then. </p> <p>Or maybe there is a better way to do all of this anyway?</p>
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      1. POHow to put embedded document from one document into another document using Mongoose?
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