https://artosalminen.github.io/tags/mongosh/ Recent content in Mongosh on Arto's dev time by-products Hugo -- gohugo.io en Sat, 04 Feb 2023 09:32:28 +0200 https://artosalminen.github.io/posts/how-to-copy-collection-to-another-mongo-db-in-mongosh/ Sat, 04 Feb 2023 09:32:28 +0200 https://artosalminen.github.io/posts/how-to-copy-collection-to-another-mongo-db-in-mongosh/ <p>If you need to copy a collection of documents from one Mongo collection to another, you can use the <code>mongodump</code> and <code>mongorestore</code>. But if the source database is in the same instance as the target, then you may be able to take a shortcut with <code>mongosh</code>.</p> <p>Here is the script to use:</p> <pre tabindex="0"><code>db.&lt;source collection&gt;.find().forEach(function(d){ db.getSiblingDB(&#39;&lt;dest db&gt;&#39;)[&#39;&lt;dest collection&gt;&#39;].insert(d); }); </code></pre><p>For example, if you are copying all documents from current databases <code>cars</code> collection to a database called <code>another-db</code>&rsquo;s collection <code>vehicles</code>:</p>