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POWhy would Mongoose be saving the same document multiple times?
 

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  1. POWhy would Mongoose be saving the same document multiple times?
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    <p>(Having discovered the answer, I've pared down my question to remove the less relevant bits, so that it will be more readable/useful to any future readers.)</p> <hr> <p>I'm testing out my schema/models in Mongoose to see if they work as expected. They do, mostly, except I've found that I sometimes end up with the same documents being saved multiple times.</p> <p>I'll walk through what I'm trying. First I load the model and confirm that the collection is empty:</p> <pre><code>var Artist = require('model-Artist'); Artist.find({}, function(err, docs) { docs.forEach(function(doc) { doc.remove(); }); // delete all docs to be safe }); Artist.count({}, console.log); // =&gt; null 0 </code></pre> <p>Alright, so the collection is empty. Then I create a new document using <code>new</code> with the mongoose model:</p> <pre><code>var nedRorem = new Artist(); nedRorem.names.push({ sort: 'Rorem, Ned', display: 'Ned Rorem', brief: 'Rorem', personal: true }); nedRorem.born = { year: 1923, month: 10, date: 23 }; nedRorem.places.push('USA'); </code></pre> <p>At this point I check to see how the doc looks:</p> <pre><code>&gt; nedRorem { born: Mon Oct 22 1923 20:28:00 GMT-0400 (Eastern Daylight Time), _id: 522a0694e9a7813c23000020, specialGenres: [], seeAlso: [], memberOf: [], places: [ 'USA' ], ensemble: false, names: [ { sort: 'Rorem, Ned', display: 'Ned Rorem', brief: 'Rorem', _id: 522a0694e9a7813c23000035, index: true, personal: true } ] } </code></pre> <p>Looks good. Note the _id. Then I save, and check the count:</p> <pre><code>nedRorem.save(); Artist.count({}, console.log); // =&gt; null 1 </code></pre> <p>Excellent! Let's begin creating another artist:</p> <pre><code>var catharineCrozier = new Artist(); catharineCrozier.names.push({ sort: 'Crozier, Catharine', display: 'Catharine Crozier', personal: true }); </code></pre> <p>Note that I haven't saved the new one yet. But how many Artists are there now?</p> <pre><code>Artist.count({}, console.log); // =&gt; null 3 </code></pre> <p>!!??? So who are they?</p> <pre><code>Artist.find({}, console.log); &gt; null [ { born: Mon Oct 22 1923 20:28:00 GMT-0400 (Eastern Daylight Time), _id: 522a08a7af52934c1200000a, __v: 0, specialGenres: [], seeAlso: [], memberOf: [], places: [ 'USA' ], ensemble: false, names: [ { sort: 'Rorem, Ned', display: 'Ned Rorem', brief: 'Rorem', _id: 522a08a7af52934c1200000b, index: true, personal: true } ] }, { born: Mon Oct 22 1923 20:28:00 GMT-0400 (Eastern Daylight Time), _id: 522a08a8af52934c1200000d, __v: 0, specialGenres: [], seeAlso: [], memberOf: [], places: [ 'USA' ], ensemble: false, names: [ { sort: 'Rorem, Ned', display: 'Ned Rorem', brief: 'Rorem', _id: 522a08a8af52934c1200000e, index: true, personal: true } ] }, { born: Mon Oct 22 1923 20:28:00 GMT-0400 (Eastern Daylight Time), _id: 522a08a8af52934c12000010, __v: 0, specialGenres: [], seeAlso: [], memberOf: [], places: [ 'USA' ], ensemble: false, names: [ { sort: 'Rorem, Ned', display: 'Ned Rorem', brief: 'Rorem', _id: 522a08a8af52934c12000011, index: true, personal: true } ] } ] </code></pre> <p>There are three documents of the first Artist, and they all have different ._id's from the original one I created.</p> <p>So here's where I define the Artist Schema:</p> <pre><code>var artistSchema = new mongoose.Schema({ names: [{ sort: String, display: String, brief: String, nonLatin: String, personal: { type: Boolean, default: false }, index: { type: Boolean, default: true } }], born: ucaDate(true), died: ucaDate(), ensemble: { type: Boolean, index: true, default: false }, places: { type: [ String ], index: true }, memberOf: [ { type: ObjectID, ref: 'Artist' } ], seeAlso: [ { type: ObjectID, ref: 'Artist' } ], specialGenres: [{ name: String, parent: String, classical: Boolean }] }); </code></pre> <p>What gives?</p>
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