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Development background

Institutions: Various music, sports, beauty, mathematics, physics and chemistry training institutions need to carry out class management, class statistics, class calculations, class records, and class appointment registration.
Students: need to check their course consumption and usage records in real time.
Manager: Need to check at any time, increase or decrease the number of courses for students

Functional planning

Technology selection:
Use the WeChat mini program platform for development.
Using Tencent's specialized small program cloud development technology, cloud resources include cloud functions, databases, bandwidth, storage space, timers, etc. Resource quotas are low-priced and can be built without domain names and servers.
The mini program itself is ready to use, suitable for use scenarios of gadgets, and also suitable for rapid development and iteration.
Cloud development technology uses Tencent's internal links, so there is no risk of being attacked by hackers, no DDOS attacks, saving firewall costs, high security and maintenance-free.
Resource carrying capacity can be flexibly expanded at any time according to business development needs

Database Design

LessonLogModel.DB_STRUCTURE = {
	_pid: 'string|true',
	LESSON_LOG_ID: 'string|true',


	LESSON_LOG_USER_ID: 'string|true|comment=用户ID',

	LESSON_LOG_MEET_ID: 'string|false|comment=预约项目PK',

	LESSON_LOG_DESC: 'string|false|comment=备注',

	LESSON_LOG_TYPE: 'int|true|default=1|comment=类型 0=用户约课-,1=用户取消预约+,10=后台增加课时+,11=后台减少课时-,12=后台取消预约+，13=后台恢复+',

	LESSON_LOG_EDIT_ADMIN_ID: 'string|false|comment=最近修改的管理员ID',
	LESSON_LOG_EDIT_ADMIN_NAME: 'string|false|comment=最近修改的管理员名',
	LESSON_LOG_EDIT_ADMIN_TIME: 'int|true|default=0|comment=管理员最近修改的时间',


	LESSON_LOG_CHANGE_CNT: 'int|true|default=0|comment=当变动课时数(可正负)',
	LESSON_LOG_LAST_CNT: 'int|true|default=0|comment=变动前次数',
	LESSON_LOG_NOW_CNT: 'int|true|default=0|comment=当前次数', 

	LESSON_LOG_ADD_TIME: 'int|true',
	LESSON_LOG_ADD_IP: 'string|false',

	LESSON_LOG_EDIT_TIME: 'int|true',
	LESSON_LOG_EDIT_IP: 'string|false',
}

// 字段前缀
LessonLogModel.FIELD_PREFIX = "LESSON_LOG_";

/**
 * 类型 0=初始赠送，1=学员约课,2=学员取消预约,10=后台增加课时,11=后台减少课时,12=后台取消预约，13=后台恢复
 */
LessonLogModel.TYPE = {
	INIT: 0,
	USER_APPT: 1,
	USER_CANCEL: 2,
	ADMIN_ADD: 10,
	ADMIN_REDUCE: 11,
	ADMIN_CANCEL: 12,
	ADMIN_RECOVER: 13
};

LessonLogModel.TYPE_DESC = {
	INIT: '初始赠送',
	USER_APPT: '学员约课',
	USER_CANCEL: '学员取消预约',
	ADMIN_ADD: '后台增加课时',
	ADMIN_REDUCE: '后台减少课时',
	ADMIN_CANCEL: '后台取消预约',
	ADMIN_RECOVER: '后台恢复预约'
};

JoinModel.DB_STRUCTURE = {
	_pid: 'string|true',
	JOIN_ID: 'string|true',

	JOIN_EDIT_ADMIN_ID: 'string|false|comment=最近修改的管理员ID',
	JOIN_EDIT_ADMIN_NAME: 'string|false|comment=最近修改的管理员名',
	JOIN_EDIT_ADMIN_TIME: 'int|true|default=0|comment=管理员最近修改的时间',
	JOIN_EDIT_ADMIN_STATUS: 'int|false|comment=最近管理员修改为的状态 ',

	JOIN_IS_ADMIN: 'int|true|default=0|comment=是否管理员添加 0/1',

	JOIN_CODE: 'string|true|comment=核验码15位',
	JOIN_IS_CHECKIN: 'int|true|default=0|comment=是否核销 0/1 ',
	JOIN_CHECKIN_TIME: 'int|true|default=0',

	JOIN_USER_ID: 'string|true|comment=用户ID',
	JOIN_MEET_ID: 'string|true|comment=预约PK',
	JOIN_MEET_CATE_ID: 'string|true',
	JOIN_MEET_CATE_NAME: 'string|true',
	JOIN_MEET_TITLE: 'string|true|comment=项目',
	JOIN_MEET_DAY: 'string|true|comment=日期',
	JOIN_MEET_TIME_START: 'string|true|comment=时段开始',
	JOIN_MEET_TIME_END: 'string|true|comment=时段结束',
	JOIN_MEET_TIME_MARK: 'string|true|comment=时段标识',

	JOIN_COMPLETE_END_TIME: 'string|false|comment=完整结束时间',

	JOIN_START_TIME: 'int|true|comment=开始时间戳',

	JOIN_FORMS: 'array|true|default=[]|comment=表单',
	/* title:
	   mark:
	   type:
	   val:
	*/
	JOIN_OBJ: 'object|true|default={}',

	JOIN_STATUS: 'int|true|default=1|comment=状态 1=预约成功,10=已取消, 99=系统取消',

	JOIN_REASON: 'string|false|comment=审核拒绝或者取消理由',

	JOIN_ADD_TIME: 'int|true',
	JOIN_EDIT_TIME: 'int|true',
	JOIN_ADD_IP: 'string|false',
	JOIN_EDIT_IP: 'string|false',
};

Key code implementation

// 用户预约逻辑
	async join(userId, meetId, timeMark, formsList) {
		// 预约时段是否存在
		let meetWhere = {
			_id: meetId
		};
		let day = this.getDayByTimeMark(timeMark);
		let meet = await this.getMeetOneDay(meetId, day, meetWhere);

		if (!meet) {
			this.AppError('预约时段选择错误1，请重新选择');
		}

		let daySet = this.getDaySetByTimeMark(meet, timeMark);
		if (!daySet)
			this.AppError('预约时段选择错误2，请重新选择');

		let timeSet = this.getTimeSetByTimeMark(meet, timeMark);
		if (!timeSet)
			this.AppError('预约时段选择错误3，请重新选择');

		// 规则校验
		await this.checkMeetRules(userId, meetId, timeMark, formsList);


		let data = {};

		data.JOIN_USER_ID = userId;
		data.JOIN_MEET_ID = meetId;
		data.JOIN_MEET_CATE_ID = meet.MEET_CATE_ID;
		data.JOIN_MEET_CATE_NAME = meet.MEET_CATE_NAME;
		data.JOIN_MEET_TITLE = meet.MEET_TITLE;
		data.JOIN_MEET_DAY = daySet.day;
		data.JOIN_MEET_TIME_START = timeSet.start;
		data.JOIN_MEET_TIME_END = timeSet.end;
		data.JOIN_MEET_TIME_MARK = timeMark;
		data.JOIN_START_TIME = timeUtil.time2Timestamp(daySet.day + ' ' + timeSet.start + ':00');
		data.JOIN_STATUS = JoinModel.STATUS.SUCC;
		data.JOIN_COMPLETE_END_TIME = daySet.day + ' ' + timeSet.end;

		// 入库
		for (let k = 0; k < formsList.length; k++) {
			let forms = formsList[k];
			data.JOIN_FORMS = forms;
			data.JOIN_OBJ = dataUtil.dbForms2Obj(forms);
			data.JOIN_CODE = dataUtil.genRandomIntString(15);
			await JoinModel.insert(data);
		}


		// 统计
		await this.statJoinCnt(meetId, timeMark);

		// 课时统计
		await this.editUserMeetLesson(null, userId, -1, LessonLogModel.TYPE.USER_APPT, meetId, '《' + meet.MEET_TITLE + '》')

		return {
			result: 'ok',
		}
	}

Front-end UI design

git source code

https://gitee.com/soft-m/ChildrenPalace?_from=gitee_search

From 0 to 1: Notes on student class reservation and class deduction mini program development