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私が持っている:マングース削除ネストされたサブ文書と文書が
let userSchema = mongoose.Schema({
email: {type: String, required: true, unique: true},
passwordHash: {type: String, required: true},
fullName: {type: String, required: true},
salt: {type: String, required: true},
ads: [{type: ObjectId, ref: 'Ad'}],
roles: [{type: String}]
}
let adSchema = mongoose.Schema({
author: {type: ObjectId, ref: 'User'},
title: {type: String, required: true},
category: {type: ObjectId, ref: 'Category', required: true},
town: {type: ObjectId, ref: 'Town', required: true},
} )。
let categorySchema = mongoose.Schema({
name: {type: String, required: true, unique: true},
ads: [{type: ObjectId, ref: 'Ad'}]
} );
let townSchema = mongoose.Schema({
name: {type: String, required: true, unique: true},
ads: [{type: ObjectId, ref: 'Ad'}]
} );
idで町を探して、その中のすべての広告を削除する(カテゴリや著者から広告を削除する)。どうすればいいですか?