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arangodb/Documentation/Examples/documentsCollectionReplace1...

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arangosh&gt; a1 = db.example.insert({ a : <span class="hljs-number">1</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"example/14890"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"14890"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_U-_q2iK---"</span>
}
arangosh&gt; a2 = db.example.replace(a1, { a : <span class="hljs-number">2</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"example/14890"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"14890"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_U-_q2iO---"</span>,
<span class="hljs-string">"_oldRev"</span> : <span class="hljs-string">"_U-_q2iK---"</span>
}
arangosh&gt; a3 = db.example.replace(a1, { a : <span class="hljs-number">3</span> });
[ArangoError <span class="hljs-number">1200</span>: precondition failed]