完成教学案例的后端

2025-10-31 14:45:47 +08:00
parent c3df04ed0d
commit 66c927de68
10 changed files with 301 additions and 18 deletions
--- a/server/internal/teaching_case/internal/logic/teaching_case/createteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/createteachingcaselogic.go
@@ -5,6 +5,7 @@ package teaching_case

 import (
 	"context"
+	"fmt"

 	"github.com/JACKYMYPERSON/hldrCenter/config"
 	"github.com/JACKYMYPERSON/hldrCenter/internal/teaching_case/internal/model"
@@ -30,7 +31,36 @@ func NewCreateTeachingCaseLogic(ctx context.Context, cfg *config.Config, model m
 }

 func (l *CreateTeachingCaseLogic) CreateTeachingCase(req *types.CreateTeachingCaseReq) (resp *types.BaseResp, err error) {
-	// todo: add your logic here and delete this line
+	// 1. 二次参数校验（确保必填字段非空，补充validate标签之外的逻辑）
+	if req.Title == "" || req.TutorName == "" || req.StudentNames == "" || req.Content == "" {
+		return &types.BaseResp{Code: 400, Msg: "标题、导师姓名、学生姓名、案例内容为必填项"}, nil
+	}

-	return
+	// 2. 映射请求参数到model结构体
+	data := &model.TeachingCase{
+		Title:        req.Title,
+		TutorName:    req.TutorName,
+		TutorTitle:   req.TutorTitle, // 允许为空，使用默认值""
+		StudentNames: req.StudentNames,
+		Content:      req.Content,
+		CoverUrl:     req.CoverUrl,    // 允许为空，使用默认值""
+		Sort:         int64(req.Sort), // 默认为0，无需额外处理
+		// create_time和update_time由数据库自动维护，无需手动赋值
+	}
+
+	// 3. 调用model插入数据
+	_, err = l.model.Insert(l.ctx, data)
+	if err != nil {
+		// 4. 错误处理：返回具体错误信息，便于排查
+		return &types.BaseResp{
+			Code: 500,
+			Msg:  fmt.Sprintf("创建教学案例失败：%s", err.Error()),
+		}, err
+	}
+
+	// 5. 成功响应
+	return &types.BaseResp{
+		Code: 0,
+		Msg:  "教学案例创建成功",
+	}, nil
 }
--- a/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go
@@ -5,6 +5,7 @@ package teaching_case

 import (
 	"context"
+	"fmt"

 	"github.com/JACKYMYPERSON/hldrCenter/config"
 	"github.com/JACKYMYPERSON/hldrCenter/internal/teaching_case/internal/model"
@@ -30,7 +31,28 @@ func NewDeleteTeachingCaseLogic(ctx context.Context, cfg *config.Config, model m
 }

 func (l *DeleteTeachingCaseLogic) DeleteTeachingCase(req *types.DeleteTeachingCaseReq) (resp *types.BaseResp, err error) {
-	// todo: add your logic here and delete this line
+	// 1. 参数校验：确保 ID 合法
+	if req.Id <= 0 {
+		return &types.BaseResp{Code: 400, Msg: "案例ID不合法"}, nil
+	}

-	return
+	// 2. 先查询案例是否存在且未被删除（避免重复删除或删除不存在的数据）
+	_, err = l.model.FindOne(ctx, int64(req.Id))
+	if err != nil {
+		// 若查询不到（已删除或不存在），直接返回成功提示（避免前端困惑）
+		if err == model.ErrNotFound {
+			return &types.BaseResp{Code: 0, Msg: "教学案例已删除或不存在"}, nil
+		}
+		// 其他查询错误返回500
+		return &types.BaseResp{Code: 500, Msg: fmt.Sprintf("查询案例失败：%s", err.Error())}, err
+	}
+
+	// 3. 执行软删除：更新 is_delete 为 1
+	err = l.model.Delete(l.ctx, int64(req.Id))
+	if err != nil {
+		return &types.BaseResp{Code: 500, Msg: fmt.Sprintf("删除教学案例失败：%s", err.Error())}, err
+	}
+
+	// 4. 成功响应
+	return &types.BaseResp{Code: 0, Msg: "教学案例删除成功"}, nil
 }
--- a/server/internal/teaching_case/internal/logic/teaching_case/getteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/getteachingcaselogic.go
@@ -5,6 +5,8 @@ package teaching_case

 import (
 	"context"
+	"errors"
+	"fmt"

 	"github.com/JACKYMYPERSON/hldrCenter/config"
 	"github.com/JACKYMYPERSON/hldrCenter/internal/teaching_case/internal/model"
@@ -30,7 +32,34 @@ func NewGetTeachingCaseLogic(ctx context.Context, cfg *config.Config, model mode
 }

 func (l *GetTeachingCaseLogic) GetTeachingCase(req *types.GetTeachingCaseReq) (resp *types.TeachingCaseResp, err error) {
-	// todo: add your logic here and delete this line
+	// 1. 参数校验：确保案例ID合法
+	if req.Id <= 0 {
+		return nil, errors.New("案例ID不合法")
+	}

-	return
+	// 2. 调用Model查询（已过滤已删除数据，需先同步修改Model的FindOne方法）
+	modelCase, err := l.model.FindOne(l.ctx, int64(req.Id))
+	if err != nil {
+		// 区分"未找到"和"查询异常"
+		if err == model.ErrNotFound {
+			return nil, errors.New("教学案例不存在或已删除")
+		}
+		return nil, fmt.Errorf("查询教学案例失败：%w", err)
+	}
+
+	// 3. 映射Model数据到响应结构体
+	resp = &types.TeachingCaseResp{
+		Id:           int(modelCase.Id),
+		Title:        modelCase.Title,
+		TutorName:    modelCase.TutorName,
+		TutorTitle:   modelCase.TutorTitle,
+		StudentNames: modelCase.StudentNames,
+		Content:      modelCase.Content,
+		CoverUrl:     modelCase.CoverUrl,
+		Sort:         int(modelCase.Sort),
+		CreateTime:   modelCase.CreateTime.Format("2006-01-02 15:04:05"), // 数据库自动生成，直接返回
+		UpdateTime:   modelCase.UpdateTime.Format("2006-01-02 15:04:05"), // 数据库自动更新，直接返回
+	}
+
+	return resp, nil
 }
--- a/server/internal/teaching_case/internal/logic/teaching_case/listteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/listteachingcaselogic.go
@@ -5,6 +5,7 @@ package teaching_case

 import (
 	"context"
+	"fmt"

 	"github.com/JACKYMYPERSON/hldrCenter/config"
 	"github.com/JACKYMYPERSON/hldrCenter/internal/teaching_case/internal/model"
@@ -30,7 +31,60 @@ func NewListTeachingCaseLogic(ctx context.Context, cfg *config.Config, model mod
 }

 func (l *ListTeachingCaseLogic) ListTeachingCase(req *types.ListTeachingCaseReq) (resp *types.ListTeachingCaseResp, err error) {
-	// todo: add your logic here and delete this line
+	// 1. 参数校验与默认值处理
+	if req.Page <= 0 {
+		req.Page = 1 // 默认第一页
+	}
+	if req.Size <= 0 || req.Size > 100 {
+		req.Size = 10 // 默认10条/页，最大限制100条
+	}

-	return
+	// 2. 分页计算：offset = (页码-1) * 每页条数
+	offset := (req.Page - 1) * req.Size
+
+	// 3. 调用Model层查询：先查总条数，再查分页列表
+	total, err := l.model.Count(l.ctx, req.Keyword)
+	if err != nil {
+		return nil, fmt.Errorf("查询教学案例总条数失败：%w", err)
+	}
+
+	list, err := l.model.ListByPage(l.ctx, req.Keyword, req.Sort, offset, req.Size)
+	if err != nil {
+		return nil, fmt.Errorf("查询教学案例列表失败：%w", err)
+	}
+
+	// 4. 数据映射：Model → 响应结构体（含时间类型转换）
+	respList := make([]types.TeachingCaseResp, 0, len(list))
+	for _, item := range list {
+		// 时间格式转换：time.Time → string
+		createTime := item.CreateTime.Format("2006-01-02 15:04:05")
+		updateTime := item.UpdateTime.Format("2006-01-02 15:04:05")
+		if item.CreateTime.IsZero() {
+			createTime = ""
+		}
+		if item.UpdateTime.IsZero() {
+			updateTime = ""
+		}
+
+		respList = append(respList, types.TeachingCaseResp{
+			Id:           int(item.Id),
+			Title:        item.Title,
+			TutorName:    item.TutorName,
+			TutorTitle:   item.TutorTitle,
+			StudentNames: item.StudentNames,
+			Content:      item.Content,
+			CoverUrl:     item.CoverUrl,
+			Sort:         int(item.Sort),
+			CreateTime:   createTime,
+			UpdateTime:   updateTime,
+		})
+	}
+
+	// 5. 组装响应结果
+	resp = &types.ListTeachingCaseResp{
+		Total: total,
+		List:  respList,
+	}
+
+	return resp, nil
 }
--- a/server/internal/teaching_case/internal/logic/teaching_case/updateteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/updateteachingcaselogic.go
@@ -5,6 +5,7 @@ package teaching_case

 import (
 	"context"
+	"fmt"

 	"github.com/JACKYMYPERSON/hldrCenter/config"
 	"github.com/JACKYMYPERSON/hldrCenter/internal/teaching_case/internal/model"
@@ -29,7 +30,62 @@ func NewUpdateTeachingCaseLogic(ctx context.Context, cfg *config.Config, model m
 }

 func (l *UpdateTeachingCaseLogic) UpdateTeachingCase(req *types.UpdateTeachingCaseReq) (resp *types.BaseResp, err error) {
-	// todo: add your logic here and delete this line
+	// 1. 参数校验：ID为必填且合法
+	if req.Id <= 0 {
+		return &types.BaseResp{Code: 400, Msg: "案例ID不合法"}, nil
+	}

-	return
+	// 2. 校验案例是否存在且未被删除
+	existCase, err := l.model.FindOne(l.ctx, int64(req.Id))
+	if err != nil {
+		if err == model.ErrNotFound {
+			return &types.BaseResp{Code: 404, Msg: "教学案例不存在或已删除"}, nil
+		}
+		return &types.BaseResp{Code: 500, Msg: fmt.Sprintf("查询案例失败：%s", err.Error())}, err
+	}
+
+	// 3. 部分字段更新：只更新请求中不为空/有效的值（保留原有数据）
+	updateData := &model.TeachingCase{
+		Id:           existCase.Id,       // 必须保留ID（更新条件）
+		IsDelete:     existCase.IsDelete, // 保留软删除状态（不允许通过更新修改）
+		Title:        existCase.Title,
+		TutorName:    existCase.TutorName,
+		TutorTitle:   existCase.TutorTitle,
+		StudentNames: existCase.StudentNames,
+		Content:      existCase.Content,
+		CoverUrl:     existCase.CoverUrl,
+		Sort:         existCase.Sort,
+	}
+
+	// 覆盖请求中传递的非空/有效字段
+	if req.Title != "" {
+		updateData.Title = req.Title
+	}
+	if req.TutorName != "" {
+		updateData.TutorName = req.TutorName
+	}
+	if req.TutorTitle != "" {
+		updateData.TutorTitle = req.TutorTitle
+	}
+	if req.StudentNames != "" {
+		updateData.StudentNames = req.StudentNames
+	}
+	if req.Content != "" {
+		updateData.Content = req.Content
+	}
+	if req.CoverUrl != "" {
+		updateData.CoverUrl = req.CoverUrl
+	}
+	if req.Sort != 0 { // 允许排序为0（0是合法值），仅当传递非默认值时更新
+		updateData.Sort = int64(req.Sort)
+	}
+
+	// 4. 调用Model更新数据
+	err = l.model.Update(l.ctx, updateData)
+	if err != nil {
+		return &types.BaseResp{Code: 500, Msg: fmt.Sprintf("更新教学案例失败：%s", err.Error())}, err
+	}
+
+	// 5. 成功响应
+	return &types.BaseResp{Code: 0, Msg: "教学案例更新成功"}, nil
 }
--- a/server/internal/teaching_case/internal/model/teachingcasemodel_gen.go
+++ b/server/internal/teaching_case/internal/model/teachingcasemodel_gen.go
@@ -29,6 +29,8 @@ type (
 		FindOne(ctx context.Context, id int64) (*TeachingCase, error)
 		Update(ctx context.Context, data *TeachingCase) error
 		Delete(ctx context.Context, id int64) error
+		Count(ctx context.Context, keyword string) (int64, error)
+		ListByPage(ctx context.Context, keyword string, sort int, offset, size int) ([]*TeachingCase, error)
 	}

 	defaultTeachingCaseModel struct {
@@ -47,6 +49,7 @@ type (
 		Sort         int64     `db:"sort"`          // 排序（数字越小越靠前）
 		CreateTime   time.Time `db:"create_time"`   // 创建时间
 		UpdateTime   time.Time `db:"update_time"`   // 更新时间
+		IsDelete     int64     `db:"is_delete"`     // 软删除标识（0-未删除，1-已删除）
 	}
 )

@@ -58,13 +61,14 @@ func newTeachingCaseModel(conn sqlx.SqlConn) *defaultTeachingCaseModel {
 }

 func (m *defaultTeachingCaseModel) Delete(ctx context.Context, id int64) error {
-	query := fmt.Sprintf("delete from %s where `id` = ?", m.table)
+	// 软删除：更新 is_delete 为 1，保留数据记录
+	query := fmt.Sprintf("update %s set `is_delete` = 1, `update_time` = CURRENT_TIMESTAMP where `id` = ? and `is_delete` = 0", m.table)
 	_, err := m.conn.ExecCtx(ctx, query, id)
 	return err
 }

 func (m *defaultTeachingCaseModel) FindOne(ctx context.Context, id int64) (*TeachingCase, error) {
-	query := fmt.Sprintf("select %s from %s where `id` = ? limit 1", teachingCaseRows, m.table)
+	query := fmt.Sprintf("select %s from %s where `id` = ? and `is_delete` = 0 limit 1", teachingCaseRows, m.table)
 	var resp TeachingCase
 	err := m.conn.QueryRowCtx(ctx, &resp, query, id)
 	switch err {
@@ -78,17 +82,69 @@ func (m *defaultTeachingCaseModel) FindOne(ctx context.Context, id int64) (*Teac
 }

 func (m *defaultTeachingCaseModel) Insert(ctx context.Context, data *TeachingCase) (sql.Result, error) {
-	query := fmt.Sprintf("insert into %s (%s) values (?, ?, ?, ?, ?, ?, ?)", m.table, teachingCaseRowsExpectAutoSet)
-	ret, err := m.conn.ExecCtx(ctx, query, data.Title, data.TutorName, data.TutorTitle, data.StudentNames, data.Content, data.CoverUrl, data.Sort)
+	query := fmt.Sprintf("insert into %s (%s) values (?, ?, ?, ?, ?, ?, ?, ?)", m.table, teachingCaseRowsExpectAutoSet)
+	ret, err := m.conn.ExecCtx(ctx, query, data.Title, data.TutorName, data.TutorTitle, data.StudentNames, data.Content, data.CoverUrl, data.Sort, data.IsDelete)
 	return ret, err
 }

 func (m *defaultTeachingCaseModel) Update(ctx context.Context, data *TeachingCase) error {
 	query := fmt.Sprintf("update %s set %s where `id` = ?", m.table, teachingCaseRowsWithPlaceHolder)
-	_, err := m.conn.ExecCtx(ctx, query, data.Title, data.TutorName, data.TutorTitle, data.StudentNames, data.Content, data.CoverUrl, data.Sort, data.Id)
+	_, err := m.conn.ExecCtx(ctx, query, data.Title, data.TutorName, data.TutorTitle, data.StudentNames, data.Content, data.CoverUrl, data.Sort, data.IsDelete, data.Id)
 	return err
 }

+func (m *defaultTeachingCaseModel) Count(ctx context.Context, keyword string) (int64, error) {
+	query := fmt.Sprintf("select count(id) from %s where is_delete = 0", m.table)
+	args := make([]interface{}, 0)
+
+	// 关键词搜索：模糊匹配标题、导师姓名
+	if keyword != "" {
+		query += " and (title like ? or tutor_name like ?)"
+		likeVal := "%" + strings.TrimSpace(keyword) + "%"
+		args = append(args, likeVal, likeVal)
+	}
+
+	var total int64
+	// 修正点：sqlx.QueryRowCtx 已自动扫描结果到 total，无需额外调用 Scan
+	err := m.conn.QueryRowCtx(ctx, &total, query, args...)
+	if err != nil {
+		return 0, err
+	}
+	return total, nil
+}
+
+// ListByPage：分页查询未删除的案例列表（支持关键词、排序）
+func (m *defaultTeachingCaseModel) ListByPage(ctx context.Context, keyword string, sort int, offset, size int) ([]*TeachingCase, error) {
+	query := fmt.Sprintf("select %s from %s where is_delete = 0", teachingCaseRows, m.table)
+	args := make([]interface{}, 0)
+
+	// 关键词搜索条件
+	if keyword != "" {
+		query += " and (title like ? or tutor_name like ?)"
+		likeVal := "%" + strings.TrimSpace(keyword) + "%"
+		args = append(args, likeVal, likeVal)
+	}
+
+	// 排序逻辑：优先按sort升序（数字越小越靠前），无sort则按创建时间降序
+	query += " order by "
+	if sort != 0 {
+		query += "sort asc, create_time desc"
+	} else {
+		query += "create_time desc"
+	}
+
+	// 分页条件
+	query += " limit ?, ?"
+	args = append(args, offset, size)
+
+	var list []*TeachingCase
+	err := m.conn.QueryRowsCtx(ctx, &list, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	return list, nil
+}
+
 func (m *defaultTeachingCaseModel) tableName() string {
 	return m.table
 }