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    <p>One thing is suggested when defining your doc structure: Avoid using <code>_id</code> in your own schema, as this name is internal of mongodb to represent the ObjectId. If it is strict that you do so, use <code>id</code> instead. Please see <a href="http://docs.mongodb.org/manual/reference/object-id/" rel="nofollow">http://docs.mongodb.org/manual/reference/object-id/</a>. </p> <p>So your document can now be like:</p> <pre><code>{ "id" : "f9d01fd1ef22684353149851", "name" : "Ueberschrift", "items" : [ { "id" : "be695ec7ffe71152088c57e1", "name" : "iop", "checked" : false, "subitems" : [ ] }, { "id" : "fe665ec7ffe78852088c22g8", "name" : "asd", "checked" : false, "subitems" : [ ] } ] } </code></pre> <p>the update query:</p> <pre><code>Listitems.update({ id:"f9d01fd1ef22684353149851", "items.id" : "be695ec7ffe71152088c57e1"}, {$push: {"items.$.subitems" :{ id : 1, name : "MySubitemName" }}}); </code></pre> <p>I've tested using mongodb console, and I'm assuming the object supplied in the update query matches that of the console.</p> <p>Please tell us if that worked.</p> <p><strong>EDIT to improve comment</strong>: Since you are meaning the actual object id (<code>_id</code>) when querying, please have a look a the code below, adapted as a possible fix for the object referencing:</p> <pre><code>uid =&gt; ObjectId("f9d01fd1ef22684353149851") and id =&gt; ObjectId("be695ec7ffe71152088c57e1") Listitems.update({_id:uid, "items._id" : id}, {$push: {"items.$.subitems" :{ id : 1, name : "MySubitemName" }}}); </code></pre>
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    1. POcreate new object in array (which is in a object which is in an array which is document) in meteor/mongodb
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    1. USrdonatoiop
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    1. COthank you for your answer, but it doesn't work too, i don't get any errors, but the dataset isn't updating
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    2. COHave you tested with the changed schema (using id instead of _id)? That was an issue when I first tested using your original code.
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    3. CONo, I haven't changed the _id in my scheme. I'm generating it with var id = new Meteor.Collection.ObjectID().valueOf(); Is that incorrect? Or is mongodb using an internal id-scheme that is not visible?
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