如何在删除Parent时对Parent的引用Child进行UPDATE

Question

我之所以提出这个问题，是因为我在研究时很难提出正确的问题。我希望说清楚：

我有两个模式：

父[TEAM]：

const EquipaSchema = new mongoose.Schema({
trab1: { 
type: Schema.Types.ObjectId,
required: true,
ref: 'Trab'
},
trab2: { 
type: Schema.Types.ObjectId,
required: true,
ref: 'Trab'
},
trab3: { 
type: Schema.Types.ObjectId,
required: true,
ref: 'Trab'
},
teamName: {
type: String,
required: true
},
marcsEquipa: [{
type: Schema.Types.ObjectId,
ref: 'Marcacao'
}]
},
{collection: 'Equipas'})

和孩子[项目]：

const MarcacaoSchema = new mongoose.Schema({
name: { type: String, required: true },
email: { type: String, required: true },
date: { type: Date, required: true},
hour: { type: String, required: true},
type: { type: String, required: true},
address: {type: String, required: true},
state: {type: String, default: 'Pendente'},
// equipa: { type: Schema.Types.ObjectId, ref: 'Equipa' },
equipa: {
type: String,
default: 'Não'
},
cliente: { 
type: Schema.Types.ObjectId, 
ref: 'User'
},
aval_admin: {
type: String,
default: "Sem Avaliação pelo Manager"
},
descricao: {
type: String,
default: "Sem Descrição"
},
aval_client: {
type: String,
default: "Sem Avaliação do Cliente"
},
avaliado: {
type: Boolean,
default: false
},
team: {
type: Schema.Types.ObjectId,
ref: 'Equipas'
}
},
{collection: 'Marcacao'}

我的目标是：当一个团队被删除时，团队数组['marcsEquipa[]']中的所有项目都会更新为{team:null}，这样我就可以为同一项目分配一个新的团队。

我尝试过使用中间件，但它的一些用法现在被弃用，没有成功。解决这个问题的正确方法是什么？

提前感谢

Answer 1

await Marcacao.updateMany({team: req.params._id}, {team: null});

这就是解决方案。其中req.params._id是团队id。