mongoose拉和得到拉项目

我正在从Mongoose的嵌套数组中删除一个项目，并将其返回，以便我可以将其推送到我的对象中的另一个数组。

以下是Room模型的一个实例：

 { name: "Foo", boardBucket: { currentBoardId: 1234, items: [ { boardItems: [ { id: 1, data: "path1" }, { id: 2, data: "path2" } ] }, { boardItems: [ { id: 3, data: "path4" }, { id: 4, data: "path5" } ] } ], undoedItems: [] } } 

我想要做的是从boardItems删除path1 ，并将其推入到undoedItems

使用$pull删除

我正在使用以下从boardItems删除path1 。

注意：下面是我的roomSchema.methods所以this是指roomSchema.methods一个特定的Room实例

  // where `i` is the index of the "board" I'd like to operate // on and `itemId` the `id` of the path I want to pull // - Using this dot notation because of nested array // - Note that `${i}` is simply an ES6 interpolated template // literal that has nothing to do with mongo's positional // operator var path = `boardBucket.items.${i}.boardItems`; var updateOp = {}; updateOp[path] = { id: itemId }; this.update({ $pull: updateOp }, (err, result)=> { if (err) throw err; console.log(result); }); 

这个问题

我怎样才能得到“拉”项目，所以我可以$push它到undoed项目？

roomSchema

如果有帮助，这是我的roomSchema

 var roomSchema = new mongoose.Schema({ name: String, boardBucket: { currentBoardId: String, items: [ { active: Boolean, boardId: String, boardItems: Array, undoedItems: Array, viewPosition: String } ] } });