Question

所以我有以下内容：

const Schema = mongoose.Schema;

const PhotoSchema = new Schema({
  filename: { type: String, required: true },
  userId: { type: mongoose.Schema.Types.ObjectId, required: true },
  isPublic: { type: mongoose.Schema.Types.Boolean, default: false }
}, { timestamps: true });

const PhotoAlbumSchema = new Schema({
  name: { type: String, required: true },
  userId: { type: mongoose.Schema.Types.ObjectId, required: true },
  photos: { type: mongoose.Schema.Types.Array }
}, { timestamps: true });

我的情况是这样的：删除照片时，我也想在包含照片的PhotoAlbum中删除它。我会写什么样的查询来做到这一点？

Answer 1

您可以在mongodb中使用$pull。

示例：

let deleted_photo = await Photo.findOneAndDelete(your_condition);
await PhotoAlbum.updateMany({}, { $pull: {photos: deleted_photo } });
// or
await PhotoAlbum.updateMany({}, { $pull: {photos: {"_id" : deleted_photo._id } } });

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1 个答案: