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<html>
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<title>Mongoose ODM</title>
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pre {
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form img {
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<a href="http://github.com/learnboost/mongoose"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_gray_6d6d6d.png" alt="Fork me on GitHub"></a>
<div id="wrap">
<div id="page">
<div id="menu">
<ul>
<li><a href="../index.html">Home</a></li>
<li><a href="model-definition.html">Models/Schemas</a></li>
<li><a href="schematypes.html">Schema Types</a></li>
<li><a href="schema-options.html">Schema Options</a></li>
<li><a href="middleware.html">Middleware</a></li>
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<li><a href="query.html">Queries</a></li>
<li><a href="querystream.html">Query Streams</a></li>
<li><a href="methods-statics.html">Methods &amp; Statics</a>
<li><a href="defaults.html">Defaults</a></li>
<li><a href="indexes.html">Indexes</a></li>
<li><a href="validation.html">Validation</a></li>
<li><a href="virtuals.html">Virtuals</a></li>
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<li><a href="migration-1x-2x.html">v1x - v2x Migration</a></li>
<li><a href="api.html">API</a></li>
</ul>
</div>
<h1><a href="../index.html">Mongoose</a></h1>
<div id="content">
<!-- ANNOUNCE -->
<h1>Error handling</h1>
<p>Errors returned after failed validation contain an <code>errors</code> object holding the actual ValidatorErrors. Each ValidatorError has a <code>type</code> and <code>path</code> property providing us with a little more error handling flexibility.</p>
<pre><code>var ToySchema = new Schema({
color: String
, name: String
});
var Toy = db.model('Toy', ToySchema);
Toy.schema.path('color').validate(function (value) {
return /blue|green|white|red|orange|periwinkel/i.test(value);
}, 'Invalid color');
var toy = new Toy({ color: 'grease'});
toy.save(function (err) {
// previous behavior (v1x):
console.log(err.errors.color)
// prints 'Validator "Invalid color" failed for path color'
// new v2x behavior - err.errors.color is a ValidatorError object
console.log(err.errors.color.message)
// prints 'Validator "Invalid color" failed for path color'
// you can get v1 behavior back by casting error.color toString
console.log(String(err.errors.color))
// prints 'Validator "Invalid color" failed for path color'
console.log(err.errors.color.type);
// prints "Invalid color"
console.log(err.errors.color.path)
// prints "color"
console.log(err.name)
// prints "ValidationError"
console.log(err.message)
// prints "Validation failed"
});
</code></pre>
<p>BTW, the <code>err.errors</code> object is also available on the model instance.</p>
<pre><code>toy.errors.color.message === err.errors.color.message
</code></pre>
</div>
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<input type="submit" name="go" value="Subscribe">
</div>
</form>
<div>
Mongoose by <a href="http://github.com/learnboost">LearnBoost Labs</a>.<br>
Released under the MIT license.<br>
Copyright <a href="http://learnboost.com">LearnBoost 2011</a>.
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