mirror of
https://gitee.com/johng/gf.git
synced 2024-12-07 06:37:51 +08:00
293 lines
10 KiB
Go
293 lines
10 KiB
Go
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
|
||
//
|
||
// This Source Code Form is subject to the terms of the MIT License.
|
||
// If a copy of the MIT was not distributed with this file,
|
||
// You can obtain one at https://gitee.com/johng/gf.
|
||
|
||
package gdb
|
||
|
||
import (
|
||
"fmt"
|
||
"errors"
|
||
"strings"
|
||
"database/sql"
|
||
_ "github.com/lib/pq"
|
||
_ "github.com/go-sql-driver/mysql"
|
||
"gitee.com/johng/gf/g/util/gconv"
|
||
)
|
||
|
||
// 数据库事务对象
|
||
type Tx struct {
|
||
db *Db
|
||
tx *sql.Tx
|
||
}
|
||
|
||
// 事务操作，提交
|
||
func (tx *Tx) Commit() error {
|
||
return tx.tx.Commit()
|
||
}
|
||
|
||
// 事务操作，回滚
|
||
func (tx *Tx) Rollback() error {
|
||
return tx.tx.Rollback()
|
||
}
|
||
|
||
// (事务)数据库sql查询操作，主要执行查询
|
||
func (tx *Tx) Query(query string, args ...interface{}) (*sql.Rows, error) {
|
||
p := tx.db.link.handleSqlBeforeExec(&query)
|
||
rows, err := tx.tx.Query(*p, args ...)
|
||
err = tx.db.formatError(err, p, args...)
|
||
if err == nil {
|
||
return rows, nil
|
||
}
|
||
return nil, err
|
||
}
|
||
|
||
// (事务)执行一条sql，并返回执行情况，主要用于非查询操作
|
||
func (tx *Tx) Exec(query string, args ...interface{}) (sql.Result, error) {
|
||
p := tx.db.link.handleSqlBeforeExec(&query)
|
||
r, err := tx.tx.Exec(*p, args ...)
|
||
err = tx.db.formatError(err, p, args...)
|
||
return r, err
|
||
}
|
||
|
||
// (事务)数据表查询，其中tables可以是多个联表查询语句，这种查询方式较复杂，建议使用链式操作
|
||
func (tx *Tx) Select(tables, fields string, condition interface{}, groupBy, orderBy string, first, limit int, args ... interface{}) (List, error) {
|
||
s := fmt.Sprintf("SELECT %s FROM %s ", fields, tables)
|
||
if condition != nil {
|
||
s += fmt.Sprintf("WHERE %s ", tx.db.formatCondition(condition))
|
||
}
|
||
if len(groupBy) > 0 {
|
||
s += fmt.Sprintf("GROUP BY %s ", groupBy)
|
||
}
|
||
if len(orderBy) > 0 {
|
||
s += fmt.Sprintf("ORDER BY %s ", orderBy)
|
||
}
|
||
if limit > 0 {
|
||
s += fmt.Sprintf("LIMIT %d,%d ", first, limit)
|
||
}
|
||
return tx.GetAll(s, args ... )
|
||
}
|
||
|
||
// (事务)数据库查询，获取查询结果集，以列表结构返回
|
||
func (tx *Tx) GetAll(query string, args ...interface{}) (List, error) {
|
||
// 执行sql
|
||
rows, err := tx.Query(query, args ...)
|
||
if err != nil || rows == nil {
|
||
return nil, err
|
||
}
|
||
// 列名称列表
|
||
columns, err := rows.Columns()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
// 返回结构组装
|
||
values := make([]sql.RawBytes, len(columns))
|
||
scanArgs := make([]interface{}, len(values))
|
||
var list List
|
||
for i := range values {
|
||
scanArgs[i] = &values[i]
|
||
}
|
||
for rows.Next() {
|
||
err = rows.Scan(scanArgs...)
|
||
if err != nil {
|
||
return list, err
|
||
}
|
||
row := make(Map)
|
||
for i, col := range values {
|
||
row[columns[i]] = string(col)
|
||
}
|
||
list = append(list, row)
|
||
}
|
||
return list, nil
|
||
}
|
||
|
||
// (事务)数据库查询，获取查询结果集，以关联数组结构返回
|
||
func (tx *Tx) GetOne(query string, args ...interface{}) (Map, error) {
|
||
list, err := tx.GetAll(query, args ...)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
return list[0], nil
|
||
}
|
||
|
||
// (事务)数据库查询，获取查询字段值
|
||
func (tx *Tx) GetValue(query string, args ...interface{}) (interface{}, error) {
|
||
one, err := tx.GetOne(query, args ...)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
for _, v := range one {
|
||
return v, nil
|
||
}
|
||
return nil, nil
|
||
}
|
||
|
||
// 数据库查询，获取查询数量
|
||
func (tx *Tx) GetCount(query string, args ...interface{}) (int, error) {
|
||
val, err := tx.GetValue(query, args ...)
|
||
if err != nil {
|
||
return 0, err
|
||
}
|
||
return gconv.Int(val), nil
|
||
}
|
||
|
||
// (事务)sql预处理，执行完成后调用返回值sql.Stmt.Exec完成sql操作
|
||
// 记得调用sql.Stmt.Close关闭操作对象
|
||
func (tx *Tx) Prepare(query string) (*sql.Stmt, error) {
|
||
return tx.Prepare(query)
|
||
}
|
||
|
||
// (事务)insert、replace, save， ignore操作
|
||
// 0: insert: 仅仅执行写入操作，如果存在冲突的主键或者唯一索引，那么报错返回
|
||
// 1: replace: 如果数据存在(主键或者唯一索引)，那么删除后重新写入一条
|
||
// 2: save: 如果数据存在(主键或者唯一索引)，那么更新，否则写入一条新数据
|
||
// 3: ignore: 如果数据存在(主键或者唯一索引)，那么什么也不做
|
||
func (tx *Tx) insert(table string, data Map, option uint8) (sql.Result, error) {
|
||
var keys []string
|
||
var values []string
|
||
var params []interface{}
|
||
for k, v := range data {
|
||
keys = append(keys, tx.db.charl + k + tx.db.charr)
|
||
values = append(values, "?")
|
||
params = append(params, v)
|
||
}
|
||
operation := tx.db.getInsertOperationByOption(option)
|
||
updatestr := ""
|
||
if option == OPTION_SAVE {
|
||
var updates []string
|
||
for k, _ := range data {
|
||
updates = append(updates, fmt.Sprintf("%s%s%s=VALUES(%s)", tx.db.charl, k, tx.db.charr, k))
|
||
}
|
||
updatestr = fmt.Sprintf(" ON DUPLICATE KEY UPDATE %s", strings.Join(updates, ","))
|
||
}
|
||
return tx.Exec(
|
||
fmt.Sprintf("%s INTO %s%s%s(%s) VALUES(%s) %s",
|
||
operation, tx.db.charl, table, tx.db.charr, strings.Join(keys, ","), strings.Join(values, ","), updatestr), params...
|
||
)
|
||
}
|
||
|
||
// (事务)CURD操作:单条数据写入, 仅仅执行写入操作，如果存在冲突的主键或者唯一索引，那么报错返回
|
||
func (tx *Tx) Insert(table string, data Map) (sql.Result, error) {
|
||
return tx.insert(table, data, OPTION_INSERT)
|
||
}
|
||
|
||
// (事务)CURD操作:单条数据写入, 如果数据存在(主键或者唯一索引)，那么删除后重新写入一条
|
||
func (tx *Tx) Replace(table string, data Map) (sql.Result, error) {
|
||
return tx.insert(table, data, OPTION_REPLACE)
|
||
}
|
||
|
||
// (事务)CURD操作:单条数据写入, 如果数据存在(主键或者唯一索引)，那么更新，否则写入一条新数据
|
||
func (tx *Tx) Save(table string, data Map) (sql.Result, error) {
|
||
return tx.insert(table, data, OPTION_SAVE)
|
||
}
|
||
|
||
// (事务)批量写入数据
|
||
func (tx *Tx) batchInsert(table string, list List, batch int, option uint8) (sql.Result, error) {
|
||
var keys []string
|
||
var values []string
|
||
var bvalues []string
|
||
var params []interface{}
|
||
var result sql.Result
|
||
var size = len(list)
|
||
// 判断长度
|
||
if size < 1 {
|
||
return result, errors.New("empty data list")
|
||
}
|
||
// 首先获取字段名称及记录长度
|
||
for k, _ := range list[0] {
|
||
keys = append(keys, k)
|
||
values = append(values, "?")
|
||
}
|
||
var kstr = tx.db.charl + strings.Join(keys, tx.db.charl + "," + tx.db.charr) + tx.db.charr
|
||
// 操作判断
|
||
operation := tx.db.getInsertOperationByOption(option)
|
||
updatestr := ""
|
||
if option == OPTION_SAVE {
|
||
var updates []string
|
||
for _, k := range keys {
|
||
updates = append(updates, fmt.Sprintf("%s=VALUES(%s)", tx.db.charl, k, tx.db.charr, k))
|
||
}
|
||
updatestr = fmt.Sprintf(" ON DUPLICATE KEY UPDATE %s", strings.Join(updates, ","))
|
||
}
|
||
// 构造批量写入数据格式(注意map的遍历是无序的)
|
||
for i := 0; i < size; i++ {
|
||
for _, k := range keys {
|
||
params = append(params, list[i][k])
|
||
}
|
||
bvalues = append(bvalues, "(" + strings.Join(values, ",") + ")")
|
||
if len(bvalues) == batch {
|
||
r, err := tx.Exec(fmt.Sprintf("%s INTO %s%s%s(%s) VALUES%s %s",
|
||
operation, tx.db.charl, table, tx.db.charr, kstr, strings.Join(bvalues, ","), updatestr),
|
||
params...)
|
||
if err != nil {
|
||
return result, err
|
||
}
|
||
result = r
|
||
bvalues = bvalues[:0]
|
||
}
|
||
}
|
||
// 处理最后不构成指定批量的数据
|
||
if len(bvalues) > 0 {
|
||
r, err := tx.Exec(fmt.Sprintf("%s INTO %s%s%s(%s) VALUES%s %s",
|
||
operation, tx.db.charl, table, tx.db.charr, kstr, strings.Join(bvalues, ","), updatestr),
|
||
params...)
|
||
if err != nil {
|
||
return result, err
|
||
}
|
||
result = r
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// (事务)CURD操作:批量数据指定批次量写入
|
||
func (tx *Tx) BatchInsert(table string, list List, batch int) (sql.Result, error) {
|
||
return tx.batchInsert(table, list, batch, OPTION_INSERT)
|
||
}
|
||
|
||
// (事务)CURD操作:批量数据指定批次量写入, 如果数据存在(主键或者唯一索引)，那么删除后重新写入一条
|
||
func (tx *Tx) BatchReplace(table string, list List, batch int) (sql.Result, error) {
|
||
return tx.batchInsert(table, list, batch, OPTION_REPLACE)
|
||
}
|
||
|
||
// (事务)CURD操作:批量数据指定批次量写入, 如果数据存在(主键或者唯一索引)，那么更新，否则写入一条新数据
|
||
func (tx *Tx) BatchSave(table string, list List, batch int) (sql.Result, error) {
|
||
return tx.batchInsert(table, list, batch, OPTION_SAVE)
|
||
}
|
||
|
||
// (事务)CURD操作:数据更新，统一采用sql预处理
|
||
// data参数支持字符串或者关联数组类型，内部会自行做判断处理
|
||
func (tx *Tx) Update(table string, data interface{}, condition interface{}, args ...interface{}) (sql.Result, error) {
|
||
var params []interface{}
|
||
var updates string
|
||
switch value := data.(type) {
|
||
case string:
|
||
updates = value
|
||
case Map:
|
||
var keys []string
|
||
for k, v := range value {
|
||
keys = append(keys, fmt.Sprintf("%s%s%s=?", tx.db.charl, k, tx.db.charr))
|
||
params = append(params, v)
|
||
}
|
||
updates = strings.Join(keys, ",")
|
||
|
||
default:
|
||
return nil, errors.New("invalid data type for 'data' field, string or Map expected")
|
||
}
|
||
for _, v := range args {
|
||
if r, ok := v.(string); ok {
|
||
params = append(params, r)
|
||
} else if r, ok := v.(int); ok {
|
||
params = append(params, string(r))
|
||
} else {
|
||
|
||
}
|
||
}
|
||
return tx.Exec(fmt.Sprintf("UPDATE %s%s%s SET %s WHERE %s", tx.db.charl, table, tx.db.charr, updates, condition), params...)
|
||
}
|
||
|
||
// (事务)CURD操作:删除数据
|
||
func (tx *Tx) Delete(table string, condition interface{}, args ...interface{}) (sql.Result, error) {
|
||
return tx.Exec(fmt.Sprintf("DELETE FROM %s WHERE %s", tx.db.charl, table, tx.db.charr, condition), args...)
|
||
}
|