如何在pre'indOneAndDelete'钩子中删除许多？

Question

我有一个User模型和BlogPost模型。用户模型存储一系列blogPost。我使用Model.deleteMany设置了一个预先的'findOneAndDelete'钩子，以删除与用户相关联的blogPosts，但它不起作用。 blogPosts数组中有1个帖子。

结果来自

await BlogPost.deleteMany({ _id: { $in: this.blogPosts } });

是

{ n: 0, ok: 1, deletedCount: 0 }
{ n: 0, ok: 1, deletedCount: 0 }
{ n: 0, ok: 1, deletedCount: 0 }

如果将钩子从'findOneAndDelete'更改为'remove'，则使用相同的pre钩子，但不建议使用'remove'。

有什么想法吗？

用户架构

const UserSchema = new Schema({
  name: {
    type: String,
    required: [true, 'Name is required'],
    validate: {
      validator(name) {
        if (name.length > 2 && name.length < 10) {
          return true;
        }
        return false;
      },
      message: () => `Name must be between 2 and 10 characters`
    }
  },
  posts: [PostSchema],
  likes: {
    type: Number,
    default: 0
  },
  blogPosts: [
    {
      type: Schema.Types.ObjectId,
      ref: 'blogPost'
    }
  ]
});

UserSchema.pre('findOneAndDelete', async function(next) {
  const BlogPost = mongoose.model('blogPost');
  const res = await BlogPost.deleteMany({ _id: { $in: this.blogPosts } });
  next();
});

BlogPost模式

const BlogPostSchema = new Schema({
  title: String,
  content: String,
  comments: [
    {
      type: Schema.Types.ObjectId,
      ref: 'comment'
    }
  ]
});

    const user = await User.findOneAndDelete({ name: 'Ssam' });