Javascript Mongoose会自动减少数字类型的字段
我目前在我的项目中使用了mongoose,这是我的模式:Javascript Mongoose会自动减少数字类型的字段,javascript,database,mongoose,automation,backend,Javascript,Database,Mongoose,Automation,Backend,我目前在我的项目中使用了mongoose,这是我的模式: const mongoose = require('mongoose'); const classSchema = mongoose.Schema({ _id: mongoose.Schema.Types.ObjectId, consultant: { type: mongoose.Schema.Types.ObjectId, ref: 'Consultant', required: true, },
const mongoose = require('mongoose');
const classSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
consultant: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Consultant',
required: true,
},
faculty: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Faculty',
required: true,
},
startYear: {
type: String,
required: true,
},
currentSchoolYear: {
type: String,
required: true,
},
currentSemester: {
type: String,
required: true,
},
classname: {
type: String,
required: true,
unique: true,
},
classSize: {
type: Number,
required: true,
},
warnedLength: {
type: Number,
required: true,
},
});
const Class = mongoose.model('Class', classSchema);
module.exports = Class;
如您所见,我有两个属性是
classSize
和warnedLength
是Number。现在我想做一个函数,当我从客户端单击一个按钮时,classSize
和warnedLength
的值将自动减少1。不管怎样,还是要这样做的,非常感谢你的帮助,这对我来说意义重大,祝你愉快你可以使用$inc:{classSize:-1,warnedLength:-1}
非常感谢你,如果你是越南人,它很有效:“Em cảmơn anh rất nhiều、 埃姆斯ử 瓦诺什ạy thánh công”