From 189a22c4169ee518cd4aacba4b0cf885f476e794 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Tue, 6 Aug 2024 23:01:39 +0800
Subject: [PATCH 01/10] feat: search by teacher name (PERF SUCKS)

---
 danke/api/course_group.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/danke/api/course_group.go b/danke/api/course_group.go
index 25c5c0b..d616a84 100644
--- a/danke/api/course_group.go
+++ b/danke/api/course_group.go
@@ -2,6 +2,7 @@ package api
 
 import (
 	"errors"
+
 	"github.com/gofiber/fiber/v2"
 	. "github.com/opentreehole/backend/common"
 	. "github.com/opentreehole/backend/danke/model"
@@ -148,7 +149,9 @@ func SearchCourseGroupV3(c *fiber.Ctx) (err error) {
 	if CourseCodeRegexp.MatchString(query) {
 		querySet = querySet.Where("code LIKE ?", query+"%")
 	} else {
-		querySet = querySet.Where("name LIKE ?", "%"+query+"%")
+		// 查询教师名，先在课程表获取含有该教师名的课程所对应课程组编号列表，然后按所得编码查询主表
+		subQuery := querySet.Select("code").Where("teachers LIKE ?", "%"+query+"%").Table("course")
+		querySet = querySet.Where("name LIKE ? OR code IN (?)", "%"+query+"%", subQuery)
 	}
 	if page > 0 {
 		if pageSize == 0 {

From daf5b8c1eb6741db7a041d8f87772ec9c93efe00 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Thu, 8 Aug 2024 22:21:25 +0800
Subject: [PATCH 02/10] fix: improve performance

---
 danke/api/course_group.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/danke/api/course_group.go b/danke/api/course_group.go
index d616a84..bd3de5b 100644
--- a/danke/api/course_group.go
+++ b/danke/api/course_group.go
@@ -150,8 +150,8 @@ func SearchCourseGroupV3(c *fiber.Ctx) (err error) {
 		querySet = querySet.Where("code LIKE ?", query+"%")
 	} else {
 		// 查询教师名，先在课程表获取含有该教师名的课程所对应课程组编号列表，然后按所得编码查询主表
-		subQuery := querySet.Select("code").Where("teachers LIKE ?", "%"+query+"%").Table("course")
-		querySet = querySet.Where("name LIKE ? OR code IN (?)", "%"+query+"%", subQuery)
+		subQuery := querySet.Select("course_group_id").Where("teacher LIKE ?", "%"+query+"%").Table("teacher")
+		querySet = querySet.Where("name LIKE ? OR id IN (?)", "%"+query+"%", subQuery)
 	}
 	if page > 0 {
 		if pageSize == 0 {

From 31b2d94d370e403fd8b4f245692e04707a9a26fd Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Sun, 11 Aug 2024 10:09:29 +0800
Subject: [PATCH 03/10] fix: improve performance by using join

---
 danke/api/course_group.go    |   9 ++-
 danke_utils/teacher_table.go | 141 +++++++++++++++++++++++++++++++++++
 2 files changed, 147 insertions(+), 3 deletions(-)
 create mode 100644 danke_utils/teacher_table.go

diff --git a/danke/api/course_group.go b/danke/api/course_group.go
index bd3de5b..cf5e4ff 100644
--- a/danke/api/course_group.go
+++ b/danke/api/course_group.go
@@ -149,9 +149,12 @@ func SearchCourseGroupV3(c *fiber.Ctx) (err error) {
 	if CourseCodeRegexp.MatchString(query) {
 		querySet = querySet.Where("code LIKE ?", query+"%")
 	} else {
-		// 查询教师名，先在课程表获取含有该教师名的课程所对应课程组编号列表，然后按所得编码查询主表
-		subQuery := querySet.Select("course_group_id").Where("teacher LIKE ?", "%"+query+"%").Table("teacher")
-		querySet = querySet.Where("name LIKE ? OR id IN (?)", "%"+query+"%", subQuery)
+		queryWord :="%"+query+"%"
+		querySet = querySet.
+			Joins("JOIN teacher_courses tc ON course_group.id = tc.course_group_id").
+			Joins("JOIN teacher t ON tc.teacher_id = t.id").
+			Where("t.name like ? OR course_group.name LIKE ?", queryWord, queryWord).
+			Group("id")
 	}
 	if page > 0 {
 		if pageSize == 0 {
diff --git a/danke_utils/teacher_table.go b/danke_utils/teacher_table.go
new file mode 100644
index 0000000..2bb7b65
--- /dev/null
+++ b/danke_utils/teacher_table.go
@@ -0,0 +1,141 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/opentreehole/backend/common"
+	"github.com/spf13/viper"
+	"gorm.io/driver/mysql"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/logger"
+	"gorm.io/gorm/schema"
+)
+
+const (
+	BatchSize = 1000
+)
+
+var GormConfig = &gorm.Config{
+	NamingStrategy: schema.NamingStrategy{
+		SingularTable: true, // 表名使用单数, `User` -> `user`
+	},
+	DisableForeignKeyConstraintWhenMigrating: true, // 禁用自动创建外键约束，必须手动创建或者在业务逻辑层维护
+	Logger: logger.New(
+		log.New(os.Stdout, "\r\n", log.LstdFlags),
+		logger.Config{
+			SlowThreshold:             time.Second,  // 慢 SQL 阈值
+			LogLevel:                  logger.Error, // 日志级别
+			IgnoreRecordNotFoundError: true,         // 忽略ErrRecordNotFound（记录未找到）错误
+			Colorful:                  false,        // 禁用彩色打印
+		},
+	),
+}
+
+type Course struct {
+	ID            int    `json:"id"`
+	Name          string `json:"name" gorm:"not null"`    // 课程名称
+	Code          string `json:"code" gorm:"not null"`    // 课程编号
+	CodeID        string `json:"code_id" gorm:"not null"` // 选课序号。用于区分同一课程编号的不同平行班
+	Teachers      string `json:"teachers" gorm:"not null"`
+	CourseGroupID int    `json:"course_group_id" gorm:"not null;index"` // 课程组类型
+}
+
+type Teacher struct {
+	ID   int
+	Name string `gorm:"not null"` // 课程组类型
+}
+
+type TeacherCourseLink struct {
+	TeacherID     int `gorm:"primaryKey;autoIncrement:false"`
+	CourseGroupID int `gorm:"primaryKey;autoIncrement:false"` // 课程组类型
+}
+
+var DB *gorm.DB
+
+func Init() {
+	viper.AutomaticEnv()
+	dbType := viper.GetString(common.EnvDBType)
+	dbUrl := viper.GetString(common.EnvDBUrl)
+
+	var err error
+
+	switch dbType {
+	case "mysql":
+		DB, err = gorm.Open(mysql.Open(dbUrl), GormConfig)
+	case "postgres":
+		DB, err = gorm.Open(postgres.Open(dbUrl), GormConfig)
+	default:
+		panic("db type not supported")
+	}
+
+	if err != nil {
+		panic(err)
+	}
+}
+
+func main() {
+	Init()
+
+	// reader := bufio.NewReader(os.Stdin)
+
+	dataMap := map[string][]int{}
+
+	var offset int = 0
+	var queryResult []Course
+	for {
+		query := DB.Table("course").Limit(BatchSize).Offset(offset)
+		query.Find(&queryResult)
+		offset += len(queryResult)
+
+		if len(queryResult) == 0 {
+			// Finished iterating
+			break
+		}
+
+		for _, course := range queryResult {
+			teacherList := strings.Split(course.Teachers, ",")
+			for _, name := range teacherList {
+				courseList, found := dataMap[name]
+				if found {
+					dataMap[name] = append(courseList, course.CourseGroupID)
+				} else {
+					dataMap[name] = []int{course.CourseGroupID}
+				}
+			}
+		}
+
+		// Avoid insertion failure due to duplication
+
+		fmt.Printf("Handled %d records\n", offset)
+		// _, _ = reader.ReadString('\n')
+	}
+
+	var teachers []*Teacher
+	for k := range dataMap {
+		teachers = append(teachers, &Teacher{Name: k})
+	}
+
+	DB.Clauses(clause.OnConflict{DoNothing: true}).Table("teacher").Create(teachers)
+
+	var links []*TeacherCourseLink
+	for index, teacher := range teachers {
+		for _, cid := range dataMap[teacher.Name] {
+			links = append(links, &TeacherCourseLink{TeacherID: teacher.ID, CourseGroupID: cid})
+		}
+
+		// Submit every 100 teachers to avoid SQL being too long
+		if index%100 == 0 {
+			fmt.Printf("Inserted %d teachers\n", index)
+
+			// Avoid insertion failure due to duplication
+			DB.Clauses(clause.OnConflict{DoNothing: true}).Table("teacher_courses").Create(links)
+			links = nil
+		}
+	}
+}

From b29551c8e66a339ba9987aa712b572442000b9f1 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Sun, 11 Aug 2024 10:15:06 +0800
Subject: [PATCH 04/10] chore: adjust directory structure

---
 danke_utils/main.go          | 60 ++++++++++++++++++++++++++++++++++++
 danke_utils/teacher_table.go | 50 +-----------------------------
 2 files changed, 61 insertions(+), 49 deletions(-)
 create mode 100644 danke_utils/main.go

diff --git a/danke_utils/main.go b/danke_utils/main.go
new file mode 100644
index 0000000..b578c6e
--- /dev/null
+++ b/danke_utils/main.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"log"
+	"os"
+	"time"
+
+	"github.com/opentreehole/backend/common"
+	"github.com/spf13/viper"
+	"gorm.io/driver/mysql"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+	"gorm.io/gorm/schema"
+)
+
+var GormConfig = &gorm.Config{
+	NamingStrategy: schema.NamingStrategy{
+		SingularTable: true, // 表名使用单数, `User` -> `user`
+	},
+	DisableForeignKeyConstraintWhenMigrating: true, // 禁用自动创建外键约束，必须手动创建或者在业务逻辑层维护
+	Logger: logger.New(
+		log.New(os.Stdout, "\r\n", log.LstdFlags),
+		logger.Config{
+			SlowThreshold:             time.Second,  // 慢 SQL 阈值
+			LogLevel:                  logger.Error, // 日志级别
+			IgnoreRecordNotFoundError: true,         // 忽略ErrRecordNotFound（记录未找到）错误
+			Colorful:                  false,        // 禁用彩色打印
+		},
+	),
+}
+
+var DB *gorm.DB
+
+func Init() {
+	viper.AutomaticEnv()
+	dbType := viper.GetString(common.EnvDBType)
+	dbUrl := viper.GetString(common.EnvDBUrl)
+
+	var err error
+
+	switch dbType {
+	case "mysql":
+		DB, err = gorm.Open(mysql.Open(dbUrl), GormConfig)
+	case "postgres":
+		DB, err = gorm.Open(postgres.Open(dbUrl), GormConfig)
+	default:
+		panic("db type not supported")
+	}
+
+	if err != nil {
+		panic(err)
+	}
+}
+
+func main() {
+	Init()
+	// Call any script as needed
+	// GenerateTeacherTabele(DB)
+}
\ No newline at end of file
diff --git a/danke_utils/teacher_table.go b/danke_utils/teacher_table.go
index 2bb7b65..1615445 100644
--- a/danke_utils/teacher_table.go
+++ b/danke_utils/teacher_table.go
@@ -2,41 +2,16 @@ package main
 
 import (
 	"fmt"
-	"log"
-	"os"
 	"strings"
-	"time"
 
-	"github.com/opentreehole/backend/common"
-	"github.com/spf13/viper"
-	"gorm.io/driver/mysql"
-	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
-	"gorm.io/gorm/logger"
-	"gorm.io/gorm/schema"
 )
 
 const (
 	BatchSize = 1000
 )
 
-var GormConfig = &gorm.Config{
-	NamingStrategy: schema.NamingStrategy{
-		SingularTable: true, // 表名使用单数, `User` -> `user`
-	},
-	DisableForeignKeyConstraintWhenMigrating: true, // 禁用自动创建外键约束，必须手动创建或者在业务逻辑层维护
-	Logger: logger.New(
-		log.New(os.Stdout, "\r\n", log.LstdFlags),
-		logger.Config{
-			SlowThreshold:             time.Second,  // 慢 SQL 阈值
-			LogLevel:                  logger.Error, // 日志级别
-			IgnoreRecordNotFoundError: true,         // 忽略ErrRecordNotFound（记录未找到）错误
-			Colorful:                  false,        // 禁用彩色打印
-		},
-	),
-}
-
 type Course struct {
 	ID            int    `json:"id"`
 	Name          string `json:"name" gorm:"not null"`    // 课程名称
@@ -56,30 +31,7 @@ type TeacherCourseLink struct {
 	CourseGroupID int `gorm:"primaryKey;autoIncrement:false"` // 课程组类型
 }
 
-var DB *gorm.DB
-
-func Init() {
-	viper.AutomaticEnv()
-	dbType := viper.GetString(common.EnvDBType)
-	dbUrl := viper.GetString(common.EnvDBUrl)
-
-	var err error
-
-	switch dbType {
-	case "mysql":
-		DB, err = gorm.Open(mysql.Open(dbUrl), GormConfig)
-	case "postgres":
-		DB, err = gorm.Open(postgres.Open(dbUrl), GormConfig)
-	default:
-		panic("db type not supported")
-	}
-
-	if err != nil {
-		panic(err)
-	}
-}
-
-func main() {
+func GenerateTeacherTabele(DB *gorm.DB) {
 	Init()
 
 	// reader := bufio.NewReader(os.Stdin)

From ad7c7280346343c1b710b0aa3d708fe6bb606482 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Sun, 11 Aug 2024 10:29:39 +0800
Subject: [PATCH 05/10] fix: don't return deleted comments, resolves #134

---
 danke/api/review.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/danke/api/review.go b/danke/api/review.go
index 601aba7..ac3242f 100644
--- a/danke/api/review.go
+++ b/danke/api/review.go
@@ -2,6 +2,8 @@ package api
 
 import (
 	"errors"
+	"time"
+
 	"github.com/gofiber/fiber/v2"
 	. "github.com/opentreehole/backend/common"
 	"github.com/opentreehole/backend/common/sensitive"
@@ -10,7 +12,6 @@ import (
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 	"gorm.io/plugin/dbresolver"
-	"time"
 )
 
 // GetReviewV1 godoc
@@ -70,7 +71,7 @@ func ListReviewsV1(c *fiber.Ctx) (err error) {
 
 	// 查找评论
 	var reviews ReviewList
-	err = DB.Find(&reviews, "course_id = ?", courseID).Error
+	err = DB.Where("course_id = ? AND deleted_at IS NULL", courseID).Find(&reviews).Error
 	if err != nil {
 		return
 	}

From 81ac26e6e67703030adce26fdee36c0db5cc9e51 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Sun, 11 Aug 2024 10:40:57 +0800
Subject: [PATCH 06/10] change: rename the connection table

---
 danke/api/course_group.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/danke/api/course_group.go b/danke/api/course_group.go
index cf5e4ff..35ef294 100644
--- a/danke/api/course_group.go
+++ b/danke/api/course_group.go
@@ -151,7 +151,7 @@ func SearchCourseGroupV3(c *fiber.Ctx) (err error) {
 	} else {
 		queryWord :="%"+query+"%"
 		querySet = querySet.
-			Joins("JOIN teacher_courses tc ON course_group.id = tc.course_group_id").
+			Joins("JOIN teacher_course_groups tcg ON course_group.id = tcg.course_group_id").
 			Joins("JOIN teacher t ON tc.teacher_id = t.id").
 			Where("t.name like ? OR course_group.name LIKE ?", queryWord, queryWord).
 			Group("id")

From 392ec10ce44aee7ae77eb772bf9ea2c30348038b Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Sun, 11 Aug 2024 11:11:58 +0800
Subject: [PATCH 07/10] Revert "fix: don't return deleted comments, resolves
 #134"

This reverts commit ad7c7280346343c1b710b0aa3d708fe6bb606482.
---
 danke/api/review.go | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/danke/api/review.go b/danke/api/review.go
index ac3242f..601aba7 100644
--- a/danke/api/review.go
+++ b/danke/api/review.go
@@ -2,8 +2,6 @@ package api
 
 import (
 	"errors"
-	"time"
-
 	"github.com/gofiber/fiber/v2"
 	. "github.com/opentreehole/backend/common"
 	"github.com/opentreehole/backend/common/sensitive"
@@ -12,6 +10,7 @@ import (
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 	"gorm.io/plugin/dbresolver"
+	"time"
 )
 
 // GetReviewV1 godoc
@@ -71,7 +70,7 @@ func ListReviewsV1(c *fiber.Ctx) (err error) {
 
 	// 查找评论
 	var reviews ReviewList
-	err = DB.Where("course_id = ? AND deleted_at IS NULL", courseID).Find(&reviews).Error
+	err = DB.Find(&reviews, "course_id = ?", courseID).Error
 	if err != nil {
 		return
 	}

From 3a86e2526cdeb3f1c3231280c267f2f59711b005 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Wed, 18 Dec 2024 12:50:06 +0800
Subject: [PATCH 08/10] change: resolve code review issues

---
 danke_utils/main.go          |  2 +-
 danke_utils/teacher_table.go | 37 ++++++++++++++++++------------------
 2 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/danke_utils/main.go b/danke_utils/main.go
index b578c6e..4df7dbe 100644
--- a/danke_utils/main.go
+++ b/danke_utils/main.go
@@ -56,5 +56,5 @@ func Init() {
 func main() {
 	Init()
 	// Call any script as needed
-	// GenerateTeacherTabele(DB)
+	// GenerateTeacherTable(DB)
 }
\ No newline at end of file
diff --git a/danke_utils/teacher_table.go b/danke_utils/teacher_table.go
index 1615445..b662198 100644
--- a/danke_utils/teacher_table.go
+++ b/danke_utils/teacher_table.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 
 	"gorm.io/gorm"
@@ -31,48 +32,48 @@ type TeacherCourseLink struct {
 	CourseGroupID int `gorm:"primaryKey;autoIncrement:false"` // 课程组类型
 }
 
-func GenerateTeacherTabele(DB *gorm.DB) {
+func AppendUnique[T comparable](slice []T, elems ...T) []T {
+	for _, elem := range elems {
+		if !slices.Contains(slice, elem) {
+			slice = append(slice, elem)
+		}
+	}
+
+	return slice
+}
+
+func GenerateTeacherTable(DB *gorm.DB) {
 	Init()
 
 	// reader := bufio.NewReader(os.Stdin)
 
 	dataMap := map[string][]int{}
 
-	var offset int = 0
 	var queryResult []Course
-	for {
-		query := DB.Table("course").Limit(BatchSize).Offset(offset)
-		query.Find(&queryResult)
-		offset += len(queryResult)
-
-		if len(queryResult) == 0 {
-			// Finished iterating
-			break
-		}
-
+	query := DB.Table("course")
+	query.FindInBatches(&queryResult, BatchSize, func(tx *gorm.DB, batch int) error {
 		for _, course := range queryResult {
 			teacherList := strings.Split(course.Teachers, ",")
 			for _, name := range teacherList {
 				courseList, found := dataMap[name]
 				if found {
-					dataMap[name] = append(courseList, course.CourseGroupID)
+					dataMap[name] = AppendUnique(courseList, course.CourseGroupID)
 				} else {
 					dataMap[name] = []int{course.CourseGroupID}
 				}
 			}
 		}
 
-		// Avoid insertion failure due to duplication
-
-		fmt.Printf("Handled %d records\n", offset)
-		// _, _ = reader.ReadString('\n')
-	}
+		fmt.Printf("Handled batchg %d\n", batch)
+		return nil
+		})
 
 	var teachers []*Teacher
 	for k := range dataMap {
 		teachers = append(teachers, &Teacher{Name: k})
 	}
 
+	// Avoid insertion failure due to duplication
 	DB.Clauses(clause.OnConflict{DoNothing: true}).Table("teacher").Create(teachers)
 
 	var links []*TeacherCourseLink

From b1663c2d00d3b28cf1d7685232e9c22b0baf70af Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Wed, 18 Dec 2024 22:56:15 +0800
Subject: [PATCH 09/10] add: `Teacher` model and related fields

---
 danke/model/course_group.go  | 6 ++++--
 danke/model/init.go          | 1 +
 danke/model/teacher.go       | 7 +++++++
 danke_utils/teacher_table.go | 6 +++---
 4 files changed, 15 insertions(+), 5 deletions(-)
 create mode 100644 danke/model/teacher.go

diff --git a/danke/model/course_group.go b/danke/model/course_group.go
index 2a40b24..ad84e5a 100644
--- a/danke/model/course_group.go
+++ b/danke/model/course_group.go
@@ -3,12 +3,13 @@ package model
 import (
 	"context"
 	"encoding/base64"
+	"regexp"
+	"time"
+
 	"github.com/eko/gocache/lib/v4/store"
 	"github.com/opentreehole/backend/common"
 	"github.com/vmihailenco/msgpack/v5"
 	"golang.org/x/crypto/sha3"
-	"regexp"
-	"time"
 )
 
 // CourseGroup 课程组
@@ -24,6 +25,7 @@ type CourseGroup struct {
 	CourseCount int        `json:"course_count" gorm:"not null;default:0"` // 课程数量
 	ReviewCount int        `json:"review_count" gorm:"not null;default:0"` // 评价数量
 	Courses     CourseList `json:"courses"`
+	Teachers []*Teacher    `gorm:"many2many:teacher_course_link;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
 }
 
 var CourseCodeRegexp = regexp.MustCompile(`^([A-Z]{3,})([0-9]{2,})`)
diff --git a/danke/model/init.go b/danke/model/init.go
index 47092f0..580a0d0 100644
--- a/danke/model/init.go
+++ b/danke/model/init.go
@@ -40,6 +40,7 @@ func Init() {
 	err = DB.AutoMigrate(
 		&CourseGroup{},
 		&Course{},
+		&Teacher{},
 		&Review{},
 		&ReviewHistory{},
 		&Achievement{},
diff --git a/danke/model/teacher.go b/danke/model/teacher.go
new file mode 100644
index 0000000..8cbc848
--- /dev/null
+++ b/danke/model/teacher.go
@@ -0,0 +1,7 @@
+package model
+
+type Teacher struct {
+	ID           int            `json:"id"`
+	Name         string         `json:"name" gorm:"not null"` // 教师姓名
+	CourseGroups []*CourseGroup `gorm:"many2many:teacher_course_link;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+}
\ No newline at end of file
diff --git a/danke_utils/teacher_table.go b/danke_utils/teacher_table.go
index b662198..bca6eeb 100644
--- a/danke_utils/teacher_table.go
+++ b/danke_utils/teacher_table.go
@@ -19,17 +19,17 @@ type Course struct {
 	Code          string `json:"code" gorm:"not null"`    // 课程编号
 	CodeID        string `json:"code_id" gorm:"not null"` // 选课序号。用于区分同一课程编号的不同平行班
 	Teachers      string `json:"teachers" gorm:"not null"`
-	CourseGroupID int    `json:"course_group_id" gorm:"not null;index"` // 课程组类型
+	CourseGroupID int    `json:"course_group_id" gorm:"not null;index"` // 课程组编号
 }
 
 type Teacher struct {
 	ID   int
-	Name string `gorm:"not null"` // 课程组类型
+	Name string `gorm:"not null"` // 课程组 ID
 }
 
 type TeacherCourseLink struct {
 	TeacherID     int `gorm:"primaryKey;autoIncrement:false"`
-	CourseGroupID int `gorm:"primaryKey;autoIncrement:false"` // 课程组类型
+	CourseGroupID int `gorm:"primaryKey;autoIncrement:false"` // 课程组编号
 }
 
 func AppendUnique[T comparable](slice []T, elems ...T) []T {

From 4db24aeb20f6150eca354915f99631eada13ca30 Mon Sep 17 00:00:00 2001
From: ExMatics HydrogenC <33123710+HydrogenC@users.noreply.github.com>
Date: Thu, 19 Dec 2024 07:53:52 +0800
Subject: [PATCH 10/10] fix: incosistent link table names

---
 danke/model/course_group.go  | 2 +-
 danke/model/teacher.go       | 2 +-
 danke_utils/teacher_table.go | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/danke/model/course_group.go b/danke/model/course_group.go
index ad84e5a..96a0fca 100644
--- a/danke/model/course_group.go
+++ b/danke/model/course_group.go
@@ -25,7 +25,7 @@ type CourseGroup struct {
 	CourseCount int        `json:"course_count" gorm:"not null;default:0"` // 课程数量
 	ReviewCount int        `json:"review_count" gorm:"not null;default:0"` // 评价数量
 	Courses     CourseList `json:"courses"`
-	Teachers []*Teacher    `gorm:"many2many:teacher_course_link;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Teachers []*Teacher    `gorm:"many2many:teacher_course_groups;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
 }
 
 var CourseCodeRegexp = regexp.MustCompile(`^([A-Z]{3,})([0-9]{2,})`)
diff --git a/danke/model/teacher.go b/danke/model/teacher.go
index 8cbc848..f775338 100644
--- a/danke/model/teacher.go
+++ b/danke/model/teacher.go
@@ -3,5 +3,5 @@ package model
 type Teacher struct {
 	ID           int            `json:"id"`
 	Name         string         `json:"name" gorm:"not null"` // 教师姓名
-	CourseGroups []*CourseGroup `gorm:"many2many:teacher_course_link;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	CourseGroups []*CourseGroup `gorm:"many2many:teacher_course_groups;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
 }
\ No newline at end of file
diff --git a/danke_utils/teacher_table.go b/danke_utils/teacher_table.go
index bca6eeb..a0c827b 100644
--- a/danke_utils/teacher_table.go
+++ b/danke_utils/teacher_table.go
@@ -87,7 +87,7 @@ func GenerateTeacherTable(DB *gorm.DB) {
 			fmt.Printf("Inserted %d teachers\n", index)
 
 			// Avoid insertion failure due to duplication
-			DB.Clauses(clause.OnConflict{DoNothing: true}).Table("teacher_courses").Create(links)
+			DB.Clauses(clause.OnConflict{DoNothing: true}).Table("teacher_course_groups").Create(links)
 			links = nil
 		}
 	}