<p><span class="ql-size-large">let mongoose = require("mongoose");</span></p><p><br></p><p><span class="ql-size-large">let id = "</span><span style="color:rgb(206, 145, 120);" class="ql-size-large">5fdde4f194fde474f0dffe3c</span><span class="ql-size-large">";</span></p><p><br></p><span class="ql-size-large">字符串转ObjectId(id);</span><span class="ql-size-large">mongoose.Types.ObjectId(id);</span><span class="ql-size-large">ObjectId转字符串</span><span class="ql-size-large">mongoose.Types.ObjectId(id).toString()</span><p><br></p><p><span class="ql-size-large">至此,问题就可以解决了. 愉快的撸代码吧</span> </p>