如何查询猫鼬而不是ID的特定的“按子项发布"属性值? [英] How do I query a specific Post by slug property value in mongoose instead of id?

问题描述

我知道如何通过ID查询特定帖子.但是我想使用帖子的slug属性而不是它的ID来查询它.我该怎么办?

I know how to query a specific post by id. However I want to use the slug property of the post instead of its id to to query it. How do I do so ?

//Instead of req.params.id, we have req.params.slug instead
//How do get the post in this case if the Post database model has a slug property.  
//We have the req.params.slug

//This is what needs to be changed
const post = await Post.findById(req.params.id, (error, post) => {
    console.log(error, post)
  }).populate('author')

这里是Post模型:

const mongoose = require('mongoose')

const PostSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true
  },

  subtitle: {
      type: String,
      required: true,
  },
  author: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'User',
      required: true
  },

  content: {
      type: String,
      required: true
  },
  image: String,
  category: String,
  subCategory: String,
  createdAt: {
      type: Date,
      default: new Date() 
  }
})
module.exports = mongoose.model('Post', PostSchema)

推荐答案

如果许多文档共享相同的slug，则可以使用find()；如果每个文档中的slug是唯一的，则可以使用findOne(). >

you can use find() if you have many documents share the same slug or findOne() if this slug is unique for each document

Post.find({ slug: req.params.slug }, (error, post) => {
    console.log(error, post)
});

或

Post.findOne({ slug: req.params.slug }, (error, post) => {
    console.log(error, post)
});

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