67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
package repositories
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import (
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"database/sql"
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"errors"
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"fmt"
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"log"
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"officeHours/models"
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)
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// A struct to hold the db connection
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type CourseRepo struct {
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db *sql.DB
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}
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func NewCourseRepo(db *sql.DB) *CourseRepo {
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return &CourseRepo{
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db: db,
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}
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}
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func (r *CourseRepo) FindByName(name string) (models.Course, error) {
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return r.getFromRow(r.db.QueryRow("SELECT * FROM course WHERE name=?", name))
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}
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func (r *CourseRepo) FindById(id int) (models.Course, error) {
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return r.getFromRow(r.db.QueryRow("SELECT * FROM course WHERE id=?", id))
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}
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func (r *CourseRepo) GetAll() ([]models.Course, error) {
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rows, err := r.db.Query("SELECT * FROM course ORDER BY name ASC")
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if err != nil {
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log.Printf("Error getting all courses: %s", err.Error())
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return nil, err
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}
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defer rows.Close()
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return r.getFromRows(rows)
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}
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// Helper function to get a course from multiple SQL result rows
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func (r *CourseRepo) getFromRows(rows *sql.Rows) ([]models.Course, error) {
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var courses []models.Course
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for rows.Next() {
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var course models.Course
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if err := rows.Scan(&course.Id, &course.Name); err != nil {
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log.Printf("Error scanning course row: %s", err.Error())
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return courses, err
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}
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courses = append(courses, course)
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}
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return courses, nil
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}
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// Helper function to get a course from an SQL result row
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func (r *CourseRepo) getFromRow(row *sql.Row) (models.Course, error) {
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var course models.Course
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if err := row.Scan(&course.Id, &course.Name); err != nil {
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err = fmt.Errorf("Error getting course row: %w", err)
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if !errors.Is(err, sql.ErrNoRows) {
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log.Printf(err.Error())
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}
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return models.Course{}, err
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}
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return course, nil
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}
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