142 lines
4.8 KiB
Go
142 lines
4.8 KiB
Go
// Code generated by goctl. DO NOT EDIT.
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// versions:
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// goctl version: 1.9.1
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package model
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import (
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"context"
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"database/sql"
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"fmt"
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"strings"
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"github.com/zeromicro/go-zero/core/stores/builder"
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"github.com/zeromicro/go-zero/core/stores/sqlx"
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"github.com/zeromicro/go-zero/core/stringx"
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)
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var (
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courseResourceFieldNames = builder.RawFieldNames(&CourseResource{})
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courseResourceRows = strings.Join(courseResourceFieldNames, ",")
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courseResourceRowsExpectAutoSet = strings.Join(stringx.Remove(courseResourceFieldNames, "`id`", "`create_at`", "`create_time`", "`created_at`", "`update_at`", "`update_time`", "`updated_at`"), ",")
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courseResourceRowsWithPlaceHolder = strings.Join(stringx.Remove(courseResourceFieldNames, "`id`", "`create_at`", "`create_time`", "`created_at`", "`update_at`", "`update_time`", "`updated_at`"), "=?,") + "=?"
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)
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type (
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courseResourceModel interface {
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Insert(ctx context.Context, data *CourseResource) (sql.Result, error)
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FindOne(ctx context.Context, id int64) (*CourseResource, error)
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Update(ctx context.Context, data *CourseResource) error
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Delete(ctx context.Context, id int64) error
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CountByCourseId(ctx context.Context, courseId int64) (int64, error)
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FindByCourseIdWithPage(
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ctx context.Context,
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courseId int64,
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pageSize, offset int,
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) ([]*CourseResource, error)
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}
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defaultCourseResourceModel struct {
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conn sqlx.SqlConn
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table string
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}
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CourseResource struct {
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Id int64 `db:"id"` // 资源ID（主键，自增）
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CourseId int64 `db:"course_id"` // 关联课程ID
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Title string `db:"title"` // 资源标题（如“第1章课件.pdf”）
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ResourceUrl string `db:"resource_url"` // 资源文件URL
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Size int64 `db:"size"` // 文件大小（KB，默认0）
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Sort int64 `db:"sort"` // 排序（数值越小越靠前）
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}
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)
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func newCourseResourceModel(conn sqlx.SqlConn) *defaultCourseResourceModel {
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return &defaultCourseResourceModel{
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conn: conn,
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table: "`course_resource`",
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}
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}
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func (m *defaultCourseResourceModel) Delete(ctx context.Context, id int64) error {
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query := fmt.Sprintf("delete from %s where `id` = ?", m.table)
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_, err := m.conn.ExecCtx(ctx, query, id)
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return err
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}
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func (m *defaultCourseResourceModel) FindOne(ctx context.Context, id int64) (*CourseResource, error) {
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query := fmt.Sprintf("select %s from %s where `id` = ? limit 1", courseResourceRows, m.table)
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var resp CourseResource
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err := m.conn.QueryRowCtx(ctx, &resp, query, id)
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switch err {
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case nil:
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return &resp, nil
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case sqlx.ErrNotFound:
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return nil, ErrNotFound
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default:
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return nil, err
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}
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}
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func (m *defaultCourseResourceModel) Insert(ctx context.Context, data *CourseResource) (sql.Result, error) {
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query := fmt.Sprintf("insert into %s (%s) values (?, ?, ?, ?, ?)", m.table, courseResourceRowsExpectAutoSet)
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ret, err := m.conn.ExecCtx(ctx, query, data.CourseId, data.Title, data.ResourceUrl, data.Size, data.Sort)
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return ret, err
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}
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func (m *defaultCourseResourceModel) Update(ctx context.Context, data *CourseResource) error {
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query := fmt.Sprintf("update %s set %s where `id` = ?", m.table, courseResourceRowsWithPlaceHolder)
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_, err := m.conn.ExecCtx(ctx, query, data.CourseId, data.Title, data.ResourceUrl, data.Size, data.Sort, data.Id)
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return err
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}
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func (m *defaultCourseResourceModel) CountByCourseId(ctx context.Context, courseId int64) (int64, error) {
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var count int64
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// 构造查询条件：courseId=0时查全部，否则按course_id筛选
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if courseId == 0 {
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query := fmt.Sprintf("select count(*) from %s", m.table)
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err := m.conn.QueryRowCtx(ctx, &count, query)
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return count, err
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} else {
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query := fmt.Sprintf("select count(*) from %s where `course_id` = ?", m.table)
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err := m.conn.QueryRowCtx(ctx, &count, query, courseId)
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return count, err
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}
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}
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// FindByCourseIdWithPage 实现按课程ID分页查询
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func (m *defaultCourseResourceModel) FindByCourseIdWithPage(
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ctx context.Context,
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courseId int64,
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pageSize, offset int,
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) ([]*CourseResource, error) {
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var resources []*CourseResource
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// 构造查询SQL：支持筛选+排序+分页（按sort升序，确保资源有序）
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baseQuery := fmt.Sprintf("select %s from %s", courseResourceRows, m.table)
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sortQuery := " order by `sort` asc limit ?, ?" // 按sort升序，限制条数和偏移量
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var query string
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var args []interface{}
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if courseId == 0 {
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// 查全部资源：无where条件
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query = baseQuery + sortQuery
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args = []interface{}{offset, pageSize}
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} else {
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// 按课程ID筛选
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query = baseQuery + " where `course_id` = ?" + sortQuery
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args = []interface{}{courseId, offset, pageSize}
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}
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// 执行查询
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err := m.conn.QueryRowsCtx(ctx, &resources, query, args...)
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if err != nil {
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return nil, err
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}
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return resources, nil
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}
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func (m *defaultCourseResourceModel) tableName() string {
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return m.table
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}
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