<p>Product모델에서 그럼 findoneandupdate가 아니라 update를 쓴이유도 async 덕분이라고 보면 될까요?</p>
<div style="color: #eeffff; background-color: #212121; font-family: Consolas, 'Courier New', monospace; font-size: 14px; line-height: 19px; white-space: pre;">
<div>async<span style="color: #89ddff;">.</span><span style="color: #82aaff;">eachSeries</span><span style="color: #f07178;">(</span>products<span style="color: #89ddff;">,(</span>item<span style="color: #89ddff;">,</span><span style="color: #f07178;">&nbsp;</span><span style="color: #82aaff;">callback</span><span style="color: #89ddff;">)</span><span style="color: #f07178;">&nbsp;</span><span style="color: #c792ea;">=&gt;</span><span style="color: #89ddff;">{</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #ffcb6b;">Product</span><span style="color: #89ddff;">.</span><span style="color: #82aaff;">update</span><span style="color: #f07178;">(</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">{</span>_id<span style="color: #89ddff;">:</span><span style="color: #f07178;">&nbsp;</span>item<span style="color: #89ddff;">.</span>id<span style="color: #89ddff;">},</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">{</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>$inc<span style="color: #89ddff;">:</span><span style="color: #f07178;">&nbsp;</span><span style="color: #89ddff;">{</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">"</span><span style="color: #f07178;">sold</span><span style="color: #89ddff;">"</span><span style="color: #f07178;">&nbsp;</span><span style="color: #89ddff;">:</span><span style="color: #f07178;">&nbsp;</span>item<span style="color: #89ddff;">.</span>quantity</div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">}</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">},</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">{</span>new<span style="color: #89ddff;">:</span><span style="color: #f07178;">&nbsp;</span><span style="color: #ff9cac;">false</span><span style="color: #89ddff;">},</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #82aaff;">callback</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span></div>
<div><span style="color: #f07178;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #89ddff;">}</span></div>
</div>

<p>안녕하세요 !!&nbsp; 아뇨&nbsp; update과 findOneAndUpdate 모두 몽구스 메소드 입니다.&nbsp;<br />비슷한 기능이지만 update은&nbsp; 여러개의 Documents를 한번에 업데이트할 수 있으며 , findOneAndUpdate은&nbsp; &nbsp;필터 조건에 걸리는 첫번째 Document를 업데이트하는 차이가 있습니다!&nbsp;&nbsp;</p>

인프런 커뮤니티 질문&답변

update