424 lines
13 KiB
Go
424 lines
13 KiB
Go
// Package mapper 数据访问层
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package mapper
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import (
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"fmt"
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"server/config"
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"server/modules/yx/dto"
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"server/modules/yx/entity"
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"strings"
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"sync"
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"time"
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"gorm.io/gorm/clause"
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)
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type YxCalculationMajorMapper struct{}
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func NewYxCalculationMajorMapper() *YxCalculationMajorMapper {
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return &YxCalculationMajorMapper{}
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}
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// 先定义存储各协程耗时的结构体（局部使用，也可全局复用）
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type QueryCostTime struct {
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CountCost time.Duration // 总数量查询耗时
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ProbCountCost time.Duration // 四种概率数量查询耗时
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QueryCost time.Duration // 主列表查询耗时
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TotalCost time.Duration // 整体总耗时
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}
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func (m *YxCalculationMajorMapper) FindAll(page, size int) ([]entity.YxCalculationMajor, int64, error) {
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var items []entity.YxCalculationMajor
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var total int64
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config.DB.Model(&entity.YxCalculationMajor{}).Count(&total)
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err := config.DB.Offset((page - 1) * size).Limit(size).Find(&items).Error
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return items, total, err
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}
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// 调整返回值：新增 ProbabilityCountDTO，返回列表、总数量、四种概率各自数量
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func (m *YxCalculationMajorMapper) FindRecommendList(query dto.SchoolMajorQuery) ([]dto.UserMajorDTO, int64, dto.ProbabilityCountDTO, error) {
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var items []dto.UserMajorDTO
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var total int64
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var probCount dto.ProbabilityCountDTO // 四种概率的数量统计结果
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// 1. 表名合法性校验：非空 + 白名单
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tableName := query.UserScoreVO.CalculationTableName
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if tableName == "" {
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return nil, 0, dto.ProbabilityCountDTO{}, fmt.Errorf("CalculationTableName is empty")
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}
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// if !validTableNames[] {
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// return nil, 0, dto.ProbabilityCountDTO{}, fmt.Errorf("invalid table name: %s, potential SQL injection risk", tableName)
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// }
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// 2. 基础条件SQL（共用过滤条件，排除概率筛选）
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baseSQL := " WHERE 1=1 AND cm.state > 0 "
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params := []interface{}{}
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// 拼接共用过滤条件（与原有列表查询条件一致，保证统计结果准确性）
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if query.UserScoreVO.ID != "" {
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baseSQL += " AND cm.score_id = ?"
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params = append(params, query.UserScoreVO.ID)
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}
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if query.MajorType != "" {
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baseSQL += " AND cm.major_type = ?"
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params = append(params, query.MajorType)
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}
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if query.Category != "" {
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baseSQL += " AND cm.category = ?"
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params = append(params, query.Category)
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}
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if len(query.MajorTypeChildren) > 0 {
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placeholders := strings.Repeat("?,", len(query.MajorTypeChildren)-1) + "?"
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baseSQL += " AND cm.major_type_child IN (" + placeholders + ")"
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for _, v := range query.MajorTypeChildren {
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params = append(params, v)
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}
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}
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if query.MainSubjects != "" {
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baseSQL += " AND cm.main_subjects = ?"
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params = append(params, query.MainSubjects)
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}
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// 3. 优化后的总数量COUNT SQL
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countSQL := fmt.Sprintf(`
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SELECT COUNT(cm.id) FROM %s cm
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%s
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`, tableName, baseSQL)
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// 4. 四种概率批量统计SQL（使用CASE WHEN一次查询，性能最优）
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probCountSQL := fmt.Sprintf(`
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SELECT
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SUM(CASE WHEN cm.enroll_probability < 60 THEN 1 ELSE 0 END) AS hard_admit,
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SUM(CASE WHEN cm.enroll_probability >= 60 AND cm.enroll_probability < 73 THEN 1 ELSE 0 END) AS impact,
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SUM(CASE WHEN cm.enroll_probability >= 73 AND cm.enroll_probability < 93 THEN 1 ELSE 0 END) AS stable,
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SUM(CASE WHEN cm.enroll_probability >= 93 THEN 1 ELSE 0 END) AS secure
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FROM %s cm
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%s
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`, tableName, baseSQL)
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// 5. 主查询SQL（保留原有字段和JOIN）
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mainSQL := fmt.Sprintf(`
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SELECT
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cm.id,
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s.school_name,
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s.school_icon,
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cm.state,
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cm.school_code,
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cm.major_code,
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cm.major_name,
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cm.enrollment_code,
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cm.tuition,
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cm.detail as majorDetail,
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cm.category,
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cm.batch,
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cm.private_student_converted_score as privateStudentScore,
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cm.student_old_converted_score as studentScore,
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cm.student_converted_score,
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cm.enroll_probability,
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cm.rules_enroll_probability_sx,
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cm.rules_enroll_probability,
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cm.probability_operator,
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cm.major_type,
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cm.major_type_child,
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cm.plan_num,
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cm.main_subjects,
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cm.limitation,
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cm.other_score_limitation,
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s.province as province,
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s.school_nature as schoolNature,
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s.institution_type as institutionType
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FROM %s cm
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LEFT JOIN yx_school_child sc ON sc.school_code = cm.school_code
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LEFT JOIN yx_school_research_teaching srt ON srt.school_id = sc.school_id
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LEFT JOIN yx_school s ON s.id = sc.school_id
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%s
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`, tableName, baseSQL)
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// 拼接传入概率的筛选条件（兼容原有业务逻辑）
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switch query.Probability {
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case "难录取":
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mainSQL += " AND cm.enroll_probability < 60"
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case "可冲击":
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mainSQL += " AND (cm.enroll_probability >= 60 and cm.enroll_probability < 73)"
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case "较稳妥":
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mainSQL += " AND (cm.enroll_probability >= 73 and cm.enroll_probability < 93)"
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case "可保底":
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mainSQL += " AND (cm.enroll_probability >= 93)"
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}
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// 6. 分页参数合法性校验
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page := query.Page
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size := query.Size
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if page < 1 {
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page = 1
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}
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if size < 1 {
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size = 10
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}
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if size > 100 {
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size = 100
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}
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offset := (page - 1) * size
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// 提前拼接分页条件，避免协程内操作共享变量
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mainSQL += fmt.Sprintf(" LIMIT %d OFFSET %d", size, offset)
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// 7. 协程并发执行三个查询（总数量、概率数量、主列表），提升性能
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// ---------------------- 核心局部代码（替换你原来的协程块） ----------------------
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var wg sync.WaitGroup
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var countErr, probCountErr, queryErr error
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var queryCost QueryCostTime // 存储各协程耗时
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var mu sync.Mutex // 互斥锁：防止多协程同时修改queryCost引发竞态问题
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// 整体开始时间
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totalStartTime := time.Now()
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wg.Add(3)
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// 协程1：总数量查询（单独记录耗时）
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go func() {
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defer wg.Done()
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// 记录该协程单独的开始时间
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start := time.Now()
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countErr = config.DB.Raw(countSQL, params...).Count(&total).Error
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// 计算该协程耗时，通过互斥锁安全写入共享变量
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mu.Lock()
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queryCost.CountCost = time.Now().Sub(start)
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mu.Unlock()
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}()
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// 协程2：四种概率数量批量查询（单独记录耗时）
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go func() {
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defer wg.Done()
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// 记录该协程单独的开始时间
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start := time.Now()
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probCountErr = config.DB.Raw(probCountSQL, params...).Scan(&probCount).Error
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// 计算该协程耗时，通过互斥锁安全写入共享变量
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mu.Lock()
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queryCost.ProbCountCost = time.Now().Sub(start)
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mu.Unlock()
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}()
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// 协程3：主列表查询（单独记录耗时）
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go func() {
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defer wg.Done()
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// 记录该协程单独的开始时间
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start := time.Now()
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queryErr = config.DB.Raw(mainSQL, params...).Scan(&items).Error
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// 计算该协程耗时，通过互斥锁安全写入共享变量
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mu.Lock()
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queryCost.QueryCost = time.Now().Sub(start)
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mu.Unlock()
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}()
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wg.Wait()
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// 计算整体总耗时
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queryCost.TotalCost = time.Now().Sub(totalStartTime)
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// 打印各协程耗时和总耗时（按需输出，可注释或删除）
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fmt.Printf("各查询耗时统计：\n")
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fmt.Printf(" 总数量查询耗时：%v\n", queryCost.CountCost)
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fmt.Printf(" 概率数量查询耗时：%v\n", queryCost.ProbCountCost)
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fmt.Printf(" 主列表查询耗时：%v\n", queryCost.QueryCost)
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fmt.Printf(" 整体总耗时：%v\n", queryCost.TotalCost)
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// 8. 错误处理
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if countErr != nil {
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return nil, 0, dto.ProbabilityCountDTO{}, fmt.Errorf("failed to query total count: %w", countErr)
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}
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if probCountErr != nil {
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return nil, 0, dto.ProbabilityCountDTO{}, fmt.Errorf("failed to query probability count: %w", probCountErr)
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}
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if queryErr != nil {
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return nil, 0, dto.ProbabilityCountDTO{}, fmt.Errorf("failed to query recommend major list: %w", queryErr)
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}
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return items, total, probCount, nil
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}
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func (m *YxCalculationMajorMapper) FindRecommendList1(query dto.SchoolMajorQuery) ([]dto.UserMajorDTO, int64, error) {
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var items []dto.UserMajorDTO
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var total int64
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// 确保表名存在，防止 SQL 注入或空表名
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tableName := query.UserScoreVO.CalculationTableName
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if tableName == "" {
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return nil, 0, fmt.Errorf("CalculationTableName is empty")
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}
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// 使用 Sprintf 动态插入表名
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countSQL := fmt.Sprintf(`
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SELECT COUNT(cm.id) FROM %s cm
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LEFT JOIN yx_school_child sc ON sc.school_code = cm.school_code
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LEFT JOIN yx_school_research_teaching srt ON srt.school_id = sc.school_id
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LEFT JOIN yx_school s ON s.id = sc.school_id
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WHERE 1=1 AND cm.state > 0
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`, tableName)
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sql := fmt.Sprintf(`
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SELECT
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cm.id,
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s.school_name,
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s.school_icon,
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cm.state,
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cm.school_code,
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cm.major_code,
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cm.major_name,
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cm.enrollment_code,
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cm.tuition,
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cm.detail as majorDetail,
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cm.category,
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cm.batch,
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cm.private_student_converted_score as privateStudentScore,
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cm.student_old_converted_score as studentScore,
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cm.student_converted_score,
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cm.enroll_probability,
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cm.rules_enroll_probability_sx,
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cm.rules_enroll_probability,
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cm.probability_operator,
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cm.major_type,
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cm.major_type_child,
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cm.plan_num,
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cm.main_subjects,
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cm.limitation,
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cm.other_score_limitation,
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s.province as province,
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s.school_nature as schoolNature,
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s.institution_type as institutionType
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FROM %s cm
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LEFT JOIN yx_school_child sc ON sc.school_code = cm.school_code
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LEFT JOIN yx_school_research_teaching srt ON srt.school_id = sc.school_id
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LEFT JOIN yx_school s ON s.id = sc.school_id
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WHERE 1=1 AND cm.state > 0
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`, tableName)
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params := []interface{}{}
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// 注意：移除了 params = append(params, query.UserScoreVO.CalculationTableName) 因为表名已经通过 Sprintf 插入
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if query.UserScoreVO.ID != "" {
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countSQL += " AND cm.score_id = ?"
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sql += " AND cm.score_id = ?"
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params = append(params, query.UserScoreVO.ID)
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}
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if query.MajorType != "" {
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countSQL += " AND cm.major_type = ?"
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sql += " AND cm.major_type = ?"
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params = append(params, query.MajorType)
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}
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if query.Category != "" {
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countSQL += " AND cm.category = ?"
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sql += " AND cm.category = ?"
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params = append(params, query.Category)
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}
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if len(query.MajorTypeChildren) > 0 {
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placeholders := strings.Repeat("?,", len(query.MajorTypeChildren)-1) + "?"
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countSQL += " AND cm.major_type_child IN (" + placeholders + ")"
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sql += " AND cm.major_type_child IN (" + placeholders + ")"
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for _, v := range query.MajorTypeChildren {
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params = append(params, v)
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}
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}
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if query.MainSubjects != "" {
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countSQL += " AND cm.main_subjects = ?"
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sql += " AND cm.main_subjects = ?"
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params = append(params, query.MainSubjects)
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}
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// 录取概率
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switch query.Probability {
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case "难录取":
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countSQL += " AND cm.enroll_probability < 60"
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sql += " AND cm.enroll_probability < 60"
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case "可冲击":
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countSQL += " AND (cm.enroll_probability >= 60 and cm.enroll_probability < 73)"
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sql += " AND (cm.enroll_probability >= 60 and cm.enroll_probability < 73)"
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case "较稳妥":
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countSQL += " AND (cm.enroll_probability >= 73 and cm.enroll_probability < 93)"
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sql += " AND (cm.enroll_probability >= 73 and cm.enroll_probability < 93)"
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case "可保底":
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countSQL += " AND (cm.enroll_probability >= 93)"
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sql += " AND (cm.enroll_probability >= 93)"
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}
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// 移除了无效的 strings.Replace
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var wg sync.WaitGroup
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var countErr, queryErr error
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wg.Add(2)
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// 协程1：COUNT 查询
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go func() {
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defer wg.Done()
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countErr = config.DB.Raw(countSQL, params...).Count(&total).Error
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}()
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// 协程2：主查询
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go func() {
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defer wg.Done()
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sql += fmt.Sprintf(" LIMIT %d OFFSET %d", query.Size, (query.Page-1)*query.Size)
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queryErr = config.DB.Raw(sql, params...).Scan(&items).Error
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}()
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wg.Wait()
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if countErr != nil || queryErr != nil {
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return nil, 0, fmt.Errorf("countErr: %v, queryErr: %v", countErr, queryErr)
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}
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return items, total, queryErr
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}
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func (m *YxCalculationMajorMapper) FindByID(id string) (*entity.YxCalculationMajor, error) {
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var item entity.YxCalculationMajor
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err := config.DB.First(&item, "id = ?", id).Error
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return &item, err
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}
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func (m *YxCalculationMajorMapper) Create(item *entity.YxCalculationMajor) error {
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return config.DB.Create(item).Error
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}
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func (m *YxCalculationMajorMapper) Update(item *entity.YxCalculationMajor) error {
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return config.DB.Save(item).Error
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}
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func (m *YxCalculationMajorMapper) UpdateFields(id string, fields map[string]interface{}) error {
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return config.DB.Model(&entity.YxCalculationMajor{}).Where("id = ?", id).Updates(fields).Error
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}
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func (m *YxCalculationMajorMapper) Delete(id string) error {
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return config.DB.Delete(&entity.YxCalculationMajor{}, "id = ?", id).Error
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}
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func (m *YxCalculationMajorMapper) FindByScoreID(scoreID string) ([]entity.YxCalculationMajor, error) {
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var items []entity.YxCalculationMajor
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err := config.DB.Where("score_id = ?", scoreID).Find(&items).Error
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return items, err
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}
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func (m *YxCalculationMajorMapper) BatchCreate(tableName string, items []entity.YxCalculationMajor, batchSize int) error {
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if tableName != "" {
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return config.DB.Table(tableName).CreateInBatches(items, batchSize).Error
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}
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return config.DB.CreateInBatches(items, batchSize).Error
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}
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func (m *YxCalculationMajorMapper) BatchUpdate(items []entity.YxCalculationMajor) error {
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return config.DB.Save(items).Error
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}
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func (m *YxCalculationMajorMapper) BatchUpsert(items []entity.YxCalculationMajor, updateColumns []string) error {
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return config.DB.Clauses(clause.OnConflict{
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Columns: []clause.Column{{Name: "id"}},
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DoUpdates: clause.AssignmentColumns(updateColumns),
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}).CreateInBatches(items, 100).Error
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}
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func (m *YxCalculationMajorMapper) BatchDelete(ids []string) error {
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return config.DB.Delete(&entity.YxCalculationMajor{}, "id IN ?", ids).Error
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}
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func (m *YxCalculationMajorMapper) DeleteByScoreID(scoreID string) error {
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return config.DB.Delete(&entity.YxCalculationMajor{}, "score_id = ?", scoreID).Error
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}
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