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我对猫鼬虚拟教室下面的模式:如何使子文件在猫鼬的特定日期到期?
var classroomSchema = mongoose.Schema({
studentIds: [mongoose.Schema.Types.ObjectId],
teacherIds: [mongoose.Schema.Types.ObjectId],
teacherNames: [String],
createdAt: {
type: Date,
default: Date.now(),
},
lessons: [{
name: String,
startDate: {
type: Date,
min: Date.now(),
},
endDate: {
type: Date,
min: Date.now(),
},
**expiresAt: endDate,**
}],
});
我想每节课从教室theer结束日期过后到期。我如何在猫鼬的子文档中使用TTL?