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POCallback to find() is called multiple times
 

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  1. POCallback to find() is called multiple times
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    <p>I'm messing around with Mongoose, and I'm noticing that my <code>find</code> callback is being called multiple times when saving an invalid item:</p> <p><strong>persist.js</strong></p> <pre><code>mongoose.model('ContentTag', new mongoose.Schema({ content: requiredString, tag: requiredString })); </code></pre> <p><strong>test.js</strong> (using mocha)</p> <pre><code>describe('content tag', function() { it('should not save an empty content tag', function(done) { persist.ContentTag().save(function(err) { assert.ok(err); persist.ContentTag.find(function(err, items) { assert.equal(0, items.length); done(); }); }); }); </code></pre> <p>This produces the following error output:</p> <pre><code>Save err: ValidatorError: Validator "required" failed for path tag Save err: ValidatorError: Validator "required" failed for path content Find err: null Find err: null </code></pre> <p>And the following error:</p> <pre><code> 1) Persist content tag should not save an empty content tag: Error: done() called multiple times at multiple (/usr/local/lib/node_modules/mocha/lib/runnable.js:168:31) at done (/usr/local/lib/node_modules/mocha/lib/runnable.js:174:26) at Runnable.run.duration (/usr/local/lib/node_modules/mocha/lib/runnable.js:190:9) at persist.ContentTag.content (path/test/server-test.js:21:21) at Query.execFind (path/node_modules/mongoose/lib/mongoose/query.js:572:26) at Cursor.toArray (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:122:15) at Cursor.each (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:167:11) at Cursor.nextObject (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:467:28) at Cursor.close (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:625:17) at Cursor.nextObject (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:467:10) at Cursor.nextObject.commandHandler (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/cursor.js:452:15) at EventEmitter.emit (events.js:96:17) at Db.open.self.serverConfig.connection.addListener.self.state (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/db.js:90:12) at EventEmitter.emit (events.js:93:17) at Connection.open.receiveListener (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/connection.js:82:16) at Socket.Connection.open.receiveListener (path/node_modules/mongoose/support/node-mongodb-native/lib/mongodb/connection.js:85:16) at Socket.EventEmitter.emit (events.js:93:17) at TCP.onread (net.js:391:31) </code></pre> <p><strong>It looks like when there are multiple validation errors, the save callback is called once for each error.</strong></p> <p>When I remove the <code>new</code> keyword, I get the following error:</p> <pre><code> 1) Persist content tag should not save an empty content tag: TypeError: Object #&lt;Object&gt; has no method 'buildDoc' at Object.Document (../node_modules/mongoose/lib/mongoose/document.js:26:19) at Object.Model (../node_modules/mongoose/lib/mongoose/model.js:24:12) at Object.model [as ContentTag] </code></pre>
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    1. PTQuestion
    1. USNick Heiner
    1. USNick Heiner
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    1. This table or related slice is empty.
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    1. COTry removing the `new` keyword?
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      1. POCallback to find() is called multiple times
      1. UStheabraham
    2. COInteresting idea, but it didn't work. (OP updated)
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      1. POCallback to find() is called multiple times
      1. USNick Heiner
    3. COAdding checks and logging of `err` in the callbacks may help diagnose what's going on.
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      1. POCallback to find() is called multiple times
      1. USJohnnyHK
 

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