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arangosh&gt; db._create(<span class="hljs-string">"users"</span>, { keyOptions: { allowUserKeys: <span class="hljs-literal">false</span> } });
[ArangoCollection <span class="hljs-number">15167</span>, <span class="hljs-string">"users"</span> (type <span class="hljs-built_in">document</span>, status loaded)]
arangosh&gt; db.users.save({ name: <span class="hljs-string">"user 1"</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"users/15170"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"15170"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"15170"</span>
}
arangosh&gt; db.users.save({ name: <span class="hljs-string">"user 2"</span>, _key: <span class="hljs-string">"myuser"</span> });
[ArangoError <span class="hljs-number">1222</span>: collection does not allow using user-defined keys]
arangosh&gt; db.users.save({ name: <span class="hljs-string">"user 3"</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"users/15175"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"15175"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"15175"</span>
}