121 lines
2.4 KiB
Go
121 lines
2.4 KiB
Go
package db
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import (
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"database/sql"
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"fmt"
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_ "modernc.org/sqlite" // 导入驱动
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)
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type SQLite struct {
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DB *sql.DB
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}
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// 初始化连接
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func NewSQLite(path string) (*SQLite, error) {
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db, err := sql.Open("sqlite", path)
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if err != nil {
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return nil, fmt.Errorf("open sqlite failed: %v", err)
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}
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return &SQLite{DB: db}, nil
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}
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// 关闭数据库
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func (s *SQLite) Close() {
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if s.DB != nil {
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s.DB.Close()
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}
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}
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// 通用新建表
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func (s *SQLite) Exec_(sql string) error {
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_, err := s.DB.Exec(sql)
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if err != nil {
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return fmt.Errorf("Exec DB error: %w", err)
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}
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return nil
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}
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// 通用查询方法（返回[]map[string]any）
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func (s *SQLite) Query_(query string, args ...any) ([]map[string]any, error) {
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rows, err := s.DB.Query(query, args...)
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if err != nil {
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return nil, fmt.Errorf("query error: %v", err)
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}
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defer rows.Close()
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columns, err := rows.Columns()
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if err != nil {
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return nil, err
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}
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var results []map[string]any
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for rows.Next() {
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// 创建一个与列数相同的 slice 用于 Scan
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values := make([]any, len(columns))
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valuePtrs := make([]any, len(columns))
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for i := range values {
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valuePtrs[i] = &values[i]
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}
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if err := rows.Scan(valuePtrs...); err != nil {
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return nil, err
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}
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// 将行转换为 map
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rowMap := make(map[string]any)
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for i, col := range columns {
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val := values[i]
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if b, ok := val.([]byte); ok {
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rowMap[col] = string(b)
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} else {
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rowMap[col] = val
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}
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}
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results = append(results, rowMap)
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}
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return results, nil
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}
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// 插入数据（支持事务和批量）
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func (s *SQLite) Insert(sqlStr string, args ...[]any) error {
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tx, err := s.DB.Begin()
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if err != nil {
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return err
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}
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stmt, err := tx.Prepare(sqlStr)
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if err != nil {
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return err
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}
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defer stmt.Close()
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for _, a := range args {
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_, err = stmt.Exec(a...)
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if err != nil {
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tx.Rollback()
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return fmt.Errorf("exec insert error: %v", err)
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}
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}
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return tx.Commit()
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}
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// 更新数据
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func (s *SQLite) Update(sqlStr string, args ...any) (int64, error) {
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res, err := s.DB.Exec(sqlStr, args...)
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if err != nil {
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return 0, fmt.Errorf("update error: %v", err)
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}
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rows, _ := res.RowsAffected()
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return rows, nil
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}
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// 删除数据
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func (s *SQLite) Delete(sqlStr string, args ...any) (int64, error) {
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res, err := s.DB.Exec(sqlStr, args...)
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if err != nil {
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return 0, fmt.Errorf("delete error: %v", err)
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}
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rows, _ := res.RowsAffected()
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return rows, nil
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}
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