验证失败:slug:需要路径' slug '

Question

我创建了一个Blog，对于它的插件，我安装了slugify并需要它。我试图保存一个新的博客文章MongoDB与猫鼬，但我得到这个错误:slug: ValidatorError: Path slug is required.

我从Web Dev Simplified Youtube Channel的教程中验证了slugify，但它不起作用。

代码如下:

// getting-started.js
const mongoose = require("mongoose");
const slugify = require("slugify");
main().catch((err) => console.log(err));
async function main() {
  await mongoose.connect(process.env.ATLAS);
}
// Schema
const blogSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true,
    unique: true,
  },
  description: {
    type: String,
    required: true,
  },
  slug: {
    type: String,
    required: true,
    unique: true,
  },
});
blogSchema.pre("validate", (next) => {
  if (this.title) {
    this.slug = slugify(this.title, { lower: true, strict: true });
  }
  next();
});
//   Model
const Blog = mongoose.model("Blog", blogSchema);

Answer 1

你的代码是正确的，用常规函数替换箭头函数，因为"this"不能使用箭头函数，remove required: true

blogSchema.pre("validate", function (next) {
 if (this.title) {
    this.slug = slugify(this.title, { lower: true, strict: true });
  }
  next();
});