<div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-size: 12px; line-height: 18px; white-space: pre;">
<div><span style="color: #4fc1ff;">userSchema</span>.<span style="color: #dcdcaa;">pre</span>(<span style="color: #ce9178;">'save'</span>, <span style="color: #569cd6;">function</span> (<span style="color: #9cdcfe;">next</span>) {</div>
<div><span style="color: #888888;">// 비밀번호 암호와</span></div>
<div><span style="color: #569cd6;">var</span> <span style="color: #9cdcfe;">user</span> = <span style="color: #569cd6;">this</span>;</div>
<div><span style="color: #c586c0;">if</span> (<span style="color: #9cdcfe;">user</span>.<span style="color: #dcdcaa;">isModified</span>(<span style="color: #ce9178;">'password'</span>)) {</div>
<div><span style="color: #9cdcfe;">bcrypt</span>.<span style="color: #dcdcaa;">genSalt</span>(<span style="color: #4fc1ff;">saltRounds</span>, <span style="color: #569cd6;">function</span> (<span style="color: #9cdcfe;">err</span>, <span style="color: #9cdcfe;">salt</span>) {</div>
<div><span style="color: #c586c0;">if</span> (<span style="color: #9cdcfe;">err</span>) <span style="color: #c586c0;">return</span> <span style="color: #dcdcaa;">next</span>(<span style="color: #9cdcfe;">err</span>);</div>
<br />
<div><span style="color: #9cdcfe;">bcrypt</span>.<span style="color: #dcdcaa;">hash</span>(<span style="color: #9cdcfe;">user</span>.<span style="color: #9cdcfe;">password</span>, <span style="color: #9cdcfe;">salt</span>, <span style="color: #569cd6;">function</span> (<span style="color: #9cdcfe;">err</span>, <span style="color: #9cdcfe;">hash</span>) {</div>
<div><span style="color: #c586c0;">if</span> (<span style="color: #9cdcfe;">err</span>) <span style="color: #c586c0;">return</span> <span style="color: #dcdcaa;">next</span>(<span style="color: #9cdcfe;">err</span>);</div>
<div><span style="color: #9cdcfe;">user</span>.<span style="color: #9cdcfe;">password</span> = <span style="color: #9cdcfe;">hash</span>;</div>
<div><span style="color: #dcdcaa;">next</span>();</div>
<div>});</div>
<div>});</div>
<div>} <span style="color: #c586c0;">else</span> {</div>
<div><span style="color: #dcdcaa;">next</span>();</div>
<div>}</div>
<div>});</div>
</div>
<p></p>
<p>이거를 function 들을 화살표 함수로 바꿔보았는데 에러가 뜹니다. 혹시 왜그런지 알 수 있을까요?</p>
<p></p>

<p>변수 user에 userSchema를 this로 담았는데</p>
<p>arrow function은 this바인딩을 하지 않아서 this가 userSchema가 아닌 다른게 들어간 듯 합니다</p>

Cộng đồng Hỏi & Đáp của Inflearn

userSchema.pre 안에 function 을 화살표 함수로 바꿀 수 없나요?