我想用mongoose的$push去更新model中的数组但是却比预想的多插入了一条数据

Question

基本是一个评论的功能，回复一个评论后插入一条数据，但是结果却返回了两条

model

const postSchema = new Schema({
  uid: {
    type: String,
    required: true
  },
  author: {
    type: String,
    required: true
  },
  title: {
    type: String,
    required: true
  },
  content: {
    type: String,
    default: ''
  },
  comments: [
    {
      pid: {
        type: String
      },
      uid: {
        type: String
      },
      author: {
        type: String
      },
      content: {
        type: String,
        default: ''
      },
      createdAt: {
        type: Date,
        default: new Date()
      }
    }
  ],
  createdAt: {
    type: Date,
    default: new Date()
  }
})

route

router.post('/postComment', async ctx => {
  const { pid, uid, content, author } = ctx.request.body

  const postInfo = await Post.update(
    { _id: pid },
    {
      $push: {
        comments: { pid, uid, author, content, createdAt: new Date() }
      }
    },
    err => {
      if (err) {
        ctx.body = {
          code: -1,
          message: '回复失败'
        }
      } else {
        ctx.body = {
          code: 0,
          message: '回复成功'
        }
      }
    }
  )
})

Answer 1

老哥，请问你解决了吗？我也遇到了一样的问题了

Answer 2

我也遇到了一样的问题，使用$addToSet代替了\$push之后，解决了