mirror of
https://github.com/tangpanqing/aorm.git
synced 2025-10-06 08:26:55 +08:00
746 lines
18 KiB
Go
746 lines
18 KiB
Go
package builder
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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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"github.com/tangpanqing/aorm/model"
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"reflect"
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"strconv"
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"strings"
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"unsafe"
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)
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const Desc = "DESC"
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const Asc = "ASC"
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const Eq = "="
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const Ne = "!="
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const Gt = ">"
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const Ge = ">="
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const Lt = "<"
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const Le = "<="
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const In = "IN"
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const NotIn = "NOT IN"
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const Like = "LIKE"
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const NotLike = "NOT LIKE"
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const Between = "BETWEEN"
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const NotBetween = "NOT BETWEEN"
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const Raw = "Raw"
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const RawEq = "RawEq"
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// Builder 查询记录所需要的条件
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type Builder struct {
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//数据库操作连接
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LinkCommon model.LinkCommon
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table interface{}
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tableAlias string
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//查询参数
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tableName string
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selectList []SelectItem
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selectExpList []*SelectExpItem
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groupList []GroupItem
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whereList []WhereItem
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joinList []JoinItem
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havingList []WhereItem
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orderList []OrderItem
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offset int
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pageSize int
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distinct bool
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isDebug bool
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isLockForUpdate bool
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//sql与参数
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sql string
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paramList []interface{}
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//驱动名字
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driverName string
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}
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func (b *Builder) Distinct(distinct bool) *Builder {
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b.distinct = distinct
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return b
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}
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func (b *Builder) Driver(driverName string) *Builder {
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b.driverName = driverName
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return b
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}
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func (b *Builder) getTableNameCommon(typeOf reflect.Type, valueOf reflect.Value) string {
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if b.table != nil {
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return getTableNameByTable(b.table)
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}
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return getTableNameByReflect(typeOf, valueOf)
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}
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func getTagMap(fieldTag string) map[string]string {
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var fieldMap = make(map[string]string)
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if "" != fieldTag {
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tagArr := strings.Split(fieldTag, ";")
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for j := 0; j < len(tagArr); j++ {
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tagArrArr := strings.Split(tagArr[j], ":")
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fieldMap[tagArrArr[0]] = ""
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if len(tagArrArr) > 1 {
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fieldMap[tagArrArr[0]] = tagArrArr[1]
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}
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}
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}
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return fieldMap
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}
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// Insert 增加记录
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func (b *Builder) Insert(dest interface{}) (int64, error) {
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typeOf := reflect.TypeOf(dest)
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valueOf := reflect.ValueOf(dest)
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//主键名字
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var primaryKey = ""
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var keys []string
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var paramList []any
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var place []string
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for i := 0; i < typeOf.Elem().NumField(); i++ {
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key, tagMap := getFieldNameByReflect(typeOf.Elem().Field(i))
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//如果是Postgres数据库，寻找主键
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if b.driverName == model.Postgres {
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if _, ok := tagMap["primary"]; ok {
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primaryKey = key
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}
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}
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isNotNull := valueOf.Elem().Field(i).Field(0).Field(1).Bool()
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if isNotNull {
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val := valueOf.Elem().Field(i).Field(0).Field(0).Interface()
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keys = append(keys, key)
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paramList = append(paramList, val)
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place = append(place, "?")
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}
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}
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sqlStr := "INSERT INTO " + b.getTableNameCommon(typeOf, valueOf) + " (" + strings.Join(keys, ",") + ") VALUES (" + strings.Join(place, ",") + ")"
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if b.driverName == model.Mssql {
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return b.insertForMssqlOrPostgres(sqlStr+"; SELECT SCOPE_IDENTITY()", paramList...)
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} else if b.driverName == model.Postgres {
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sqlStr = convertToPostgresSql(sqlStr)
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return b.insertForMssqlOrPostgres(sqlStr+" RETURNING "+primaryKey, paramList...)
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} else {
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return b.insertForCommon(sqlStr, paramList...)
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}
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}
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//对于Mssql,Postgres类型数据库，为了获取最后插入的id，需要改写入为查询
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func (b *Builder) insertForMssqlOrPostgres(sql string, paramList ...any) (int64, error) {
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if b.isDebug {
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fmt.Println(sql)
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fmt.Println(paramList...)
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}
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rows, err := b.LinkCommon.Query(sql, paramList...)
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if err != nil {
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return 0, err
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}
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defer rows.Close()
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var lastInsertId1 int64
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for rows.Next() {
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rows.Scan(&lastInsertId1)
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}
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return lastInsertId1, nil
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}
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//对于非Mssql,Postgres类型数据库，可以直接获取最后插入的id
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func (b *Builder) insertForCommon(sql string, paramList ...any) (int64, error) {
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res, err := b.Exec(sql, paramList...)
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if err != nil {
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return 0, err
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}
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lastId, err := res.LastInsertId()
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if err != nil {
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return 0, err
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}
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return lastId, nil
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}
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//对于Postgres数据库，不支持?占位符，支持$1,$2类型，需要做转换
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func convertToPostgresSql(sqlStr string) string {
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t := 1
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for {
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if strings.Index(sqlStr, "?") == -1 {
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break
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}
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sqlStr = strings.Replace(sqlStr, "?", "$"+strconv.Itoa(t), 1)
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t += 1
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}
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return sqlStr
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}
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// InsertBatch 批量增加记录
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func (b *Builder) InsertBatch(values interface{}) (int64, error) {
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var keys []string
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var paramList []any
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var place []string
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valueOf := reflect.ValueOf(values).Elem()
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if valueOf.Len() == 0 {
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return 0, errors.New("the data list for insert batch not found")
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}
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typeOf := reflect.TypeOf(values).Elem().Elem()
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for j := 0; j < valueOf.Len(); j++ {
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var placeItem []string
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for i := 0; i < valueOf.Index(j).Elem().NumField(); i++ {
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isNotNull := valueOf.Index(j).Elem().Field(i).Field(0).Field(1).Bool()
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if isNotNull {
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if j == 0 {
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key, _ := getFieldNameByReflect(typeOf.Elem().Field(i))
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keys = append(keys, key)
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}
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val := valueOf.Index(j).Elem().Field(i).Field(0).Field(0).Interface()
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paramList = append(paramList, val)
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placeItem = append(placeItem, "?")
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}
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}
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place = append(place, "("+strings.Join(placeItem, ",")+")")
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}
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sqlStr := "INSERT INTO " + b.getTableNameCommon(typeOf, valueOf.Index(0)) + " (" + strings.Join(keys, ",") + ") VALUES " + strings.Join(place, ",")
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if b.driverName == model.Postgres {
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sqlStr = convertToPostgresSql(sqlStr)
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}
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res, err := b.Exec(sqlStr, paramList...)
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if err != nil {
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return 0, err
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}
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count, err := res.RowsAffected()
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if err != nil {
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return 0, err
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}
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return count, nil
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}
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// GetRows 获取行操作
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func (b *Builder) GetRows() (*sql.Rows, error) {
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sqlStr, paramList := b.GetSqlAndParams()
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smt, errSmt := b.LinkCommon.Prepare(sqlStr)
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if errSmt != nil {
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return nil, errSmt
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}
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//defer smt.Close()
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rows, errRows := smt.Query(paramList...)
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if errRows != nil {
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return nil, errRows
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}
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return rows, nil
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}
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// GetMany 查询记录(新)
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func (b *Builder) GetMany(values interface{}) error {
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rows, errRows := b.GetRows()
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defer rows.Close()
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if errRows != nil {
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return errRows
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}
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destSlice := reflect.Indirect(reflect.ValueOf(values))
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destType := destSlice.Type().Elem()
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destValue := reflect.New(destType).Elem()
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//从数据库中读出来的字段名字
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columnNameList, errColumns := rows.Columns()
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if errColumns != nil {
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return errColumns
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}
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//从结构体反射出来的属性名
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fieldNameMap := getFieldMapByReflect(destValue, destType)
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for rows.Next() {
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scans := getScansAddr(columnNameList, fieldNameMap, destValue)
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errScan := rows.Scan(scans...)
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if errScan != nil {
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return errScan
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}
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destSlice.Set(reflect.Append(destSlice, destValue))
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}
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return nil
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}
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// GetOne 查询某一条记录
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func (b *Builder) GetOne(obj interface{}) error {
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b.Limit(0, 1)
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rows, errRows := b.GetRows()
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defer rows.Close()
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if errRows != nil {
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return errRows
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}
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destType := reflect.TypeOf(obj).Elem()
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destValue := reflect.ValueOf(obj).Elem()
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//从数据库中读出来的字段名字
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columnNameList, errColumns := rows.Columns()
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if errColumns != nil {
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return errColumns
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}
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//从结构体反射出来的属性名
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fieldNameMap := getFieldMapByReflect(destValue, destType)
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for rows.Next() {
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scans := getScansAddr(columnNameList, fieldNameMap, destValue)
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err := rows.Scan(scans...)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// RawSql 执行原始的sql语句
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func (b *Builder) RawSql(sql string, paramList ...interface{}) *Builder {
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b.sql = sql
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b.paramList = paramList
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return b
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}
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func (b *Builder) GetSqlAndParams() (string, []interface{}) {
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if b.sql != "" {
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return b.sql, b.paramList
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}
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var paramList []interface{}
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tableName := getTableNameByTable(b.table)
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fieldStr, paramList := b.handleSelect(paramList)
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whereStr, paramList := b.handleWhere(paramList)
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joinStr, paramList := b.handleJoin(paramList)
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groupStr, paramList := b.handleGroup(paramList)
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havingStr, paramList := b.handleHaving(paramList)
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orderStr, paramList := b.handleOrder(paramList)
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limitStr, paramList := b.handleLimit(paramList)
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lockStr := b.handleLockForUpdate()
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sql := "SELECT " + fieldStr + " FROM " + tableName + " " + b.tableAlias + joinStr + whereStr + groupStr + havingStr + orderStr + limitStr + lockStr
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if b.driverName == model.Postgres {
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sql = convertToPostgresSql(sql)
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}
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if b.isDebug {
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fmt.Println(sql)
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fmt.Println(paramList...)
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}
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return sql, paramList
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}
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// Update 更新记录
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func (b *Builder) Update(dest interface{}) (int64, error) {
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typeOf := reflect.TypeOf(dest)
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valueOf := reflect.ValueOf(dest)
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var paramList []any
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setStr, paramList := b.handleSet(typeOf, valueOf, paramList)
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whereStr, paramList := b.handleWhere(paramList)
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sqlStr := "UPDATE " + b.getTableNameCommon(typeOf, valueOf) + setStr + whereStr
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return b.ExecAffected(sqlStr, paramList...)
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}
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// Delete 删除记录
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func (b *Builder) Delete(destList ...interface{}) (int64, error) {
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tableName := ""
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if len(destList) > 0 {
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b.Where(destList[0])
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typeOf := reflect.TypeOf(destList[0])
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valueOf := reflect.ValueOf(destList[0])
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tableName = b.getTableNameCommon(typeOf, valueOf)
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}
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if tableName == "" {
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tableName = getTableNameByTable(b.table)
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}
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var paramList []any
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whereStr, paramList := b.handleWhere(paramList)
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sqlStr := "DELETE FROM " + tableName + whereStr
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return b.ExecAffected(sqlStr, paramList...)
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}
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// Truncate 清空记录
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func (b *Builder) Truncate() (int64, error) {
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sqlStr := ""
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if b.driverName == model.Sqlite3 {
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sqlStr = "DELETE FROM " + getTableNameByTable(b.table)
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} else {
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sqlStr = "TRUNCATE TABLE " + getTableNameByTable(b.table)
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}
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return b.ExecAffected(sqlStr)
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}
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// Exists 存在某记录
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func (b *Builder) Exists() (bool, error) {
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var obj IntStruct
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err := b.selectCommon("", "1 AS c", nil, "").Limit(0, 1).GetOne(&obj)
|
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if err != nil {
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return false, err
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}
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|
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if obj.C.Int64 == 1 {
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return true, nil
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} else {
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return false, nil
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}
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}
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// DoesntExist 不存在某记录
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func (b *Builder) DoesntExist() (bool, error) {
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isE, err := b.Exists()
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return !isE, err
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||
}
|
||
|
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// Value 字段值
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func (b *Builder) Value(field interface{}, dest interface{}) error {
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||
b.Select(field).Limit(0, 1)
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fieldName := getFieldName(field)
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||
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rows, errRows := b.GetRows()
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defer rows.Close()
|
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if errRows != nil {
|
||
return errRows
|
||
}
|
||
|
||
destValue := reflect.ValueOf(dest).Elem()
|
||
|
||
//从数据库中读出来的字段名字
|
||
columnNameList, errColumns := rows.Columns()
|
||
if errColumns != nil {
|
||
return errColumns
|
||
}
|
||
|
||
for rows.Next() {
|
||
var scans []interface{}
|
||
for _, columnName := range columnNameList {
|
||
if fieldName == columnName {
|
||
scans = append(scans, destValue.Addr().Interface())
|
||
} else {
|
||
var emptyVal interface{}
|
||
scans = append(scans, &emptyVal)
|
||
}
|
||
}
|
||
|
||
err := rows.Scan(scans...)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// Pluck 获取某一列的值
|
||
func (b *Builder) Pluck(field interface{}, values interface{}) error {
|
||
b.Select(field)
|
||
fieldName := getFieldName(field)
|
||
|
||
rows, errRows := b.GetRows()
|
||
defer rows.Close()
|
||
if errRows != nil {
|
||
return errRows
|
||
}
|
||
|
||
destSlice := reflect.Indirect(reflect.ValueOf(values))
|
||
destType := destSlice.Type().Elem()
|
||
destValue := reflect.New(destType).Elem()
|
||
|
||
//从数据库中读出来的字段名字
|
||
columnNameList, errColumns := rows.Columns()
|
||
if errColumns != nil {
|
||
return errColumns
|
||
}
|
||
|
||
for rows.Next() {
|
||
var scans []interface{}
|
||
for _, columnName := range columnNameList {
|
||
if fieldName == columnName {
|
||
scans = append(scans, destValue.Addr().Interface())
|
||
} else {
|
||
var emptyVal interface{}
|
||
scans = append(scans, &emptyVal)
|
||
}
|
||
}
|
||
|
||
err := rows.Scan(scans...)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
destSlice.Set(reflect.Append(destSlice, destValue))
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// Increment 某字段自增
|
||
func (b *Builder) Increment(field interface{}, step int) (int64, error) {
|
||
var paramList []any
|
||
paramList = append(paramList, step)
|
||
whereStr, paramList := b.handleWhere(paramList)
|
||
sqlStr := "UPDATE " + getTableNameByTable(b.table) + " SET " + getFieldName(field) + "=" + getFieldName(field) + "+?" + whereStr
|
||
|
||
return b.ExecAffected(sqlStr, paramList...)
|
||
}
|
||
|
||
// Decrement 某字段自减
|
||
func (b *Builder) Decrement(field interface{}, step int) (int64, error) {
|
||
var paramList []any
|
||
paramList = append(paramList, step)
|
||
whereStr, paramList := b.handleWhere(paramList)
|
||
sqlStr := "UPDATE " + getTableNameByTable(b.table) + " SET " + getFieldName(field) + "=" + getFieldName(field) + "-?" + whereStr
|
||
|
||
return b.ExecAffected(sqlStr, paramList...)
|
||
}
|
||
|
||
// Exec 通用执行-新增,更新,删除
|
||
func (b *Builder) Exec(sql string, paramList ...interface{}) (sql.Result, error) {
|
||
if b.driverName == model.Postgres {
|
||
sql = convertToPostgresSql(sql)
|
||
}
|
||
|
||
if b.isDebug {
|
||
fmt.Println(sql)
|
||
fmt.Println(paramList...)
|
||
}
|
||
|
||
smt, err1 := b.LinkCommon.Prepare(sql)
|
||
if err1 != nil {
|
||
return nil, err1
|
||
}
|
||
defer smt.Close()
|
||
|
||
res, err2 := smt.Exec(paramList...)
|
||
if err2 != nil {
|
||
return nil, err2
|
||
}
|
||
|
||
//b.clear()
|
||
return res, nil
|
||
}
|
||
|
||
// ExecAffected 通用执行-更新,删除
|
||
func (b *Builder) ExecAffected(sql string, paramList ...interface{}) (int64, error) {
|
||
if b.driverName == model.Postgres {
|
||
sql = convertToPostgresSql(sql)
|
||
}
|
||
|
||
res, err := b.Exec(sql, paramList...)
|
||
if err != nil {
|
||
return 0, err
|
||
}
|
||
|
||
count, err := res.RowsAffected()
|
||
if err != nil {
|
||
return 0, err
|
||
}
|
||
|
||
return count, nil
|
||
}
|
||
|
||
// Debug 链式操作-是否开启调试,打印sql
|
||
func (b *Builder) Debug(isDebug bool) *Builder {
|
||
b.isDebug = isDebug
|
||
return b
|
||
}
|
||
|
||
// Table 链式操作-从哪个表查询,允许直接写别名,例如 person p
|
||
func (b *Builder) Table(table interface{}, alias ...string) *Builder {
|
||
b.table = table
|
||
if len(alias) > 0 {
|
||
b.tableAlias = alias[0]
|
||
}
|
||
return b
|
||
}
|
||
|
||
// GroupBy 链式操作,以某字段进行分组
|
||
func (b *Builder) GroupBy(field interface{}, prefix ...string) *Builder {
|
||
b.groupList = append(b.groupList, GroupItem{
|
||
Prefix: getPrefixByField(field, prefix...),
|
||
Field: field,
|
||
})
|
||
return b
|
||
}
|
||
|
||
// OrderBy 链式操作,以某字段进行排序
|
||
func (b *Builder) OrderBy(field interface{}, orderType string, prefix ...string) *Builder {
|
||
b.orderList = append(b.orderList, OrderItem{
|
||
Prefix: getPrefixByField(field, prefix...),
|
||
Field: field,
|
||
OrderType: orderType,
|
||
})
|
||
|
||
return b
|
||
}
|
||
|
||
// Limit 链式操作,分页
|
||
func (b *Builder) Limit(offset int, pageSize int) *Builder {
|
||
b.offset = offset
|
||
b.pageSize = pageSize
|
||
return b
|
||
}
|
||
|
||
// Page 链式操作,分页
|
||
func (b *Builder) Page(pageNum int, pageSize int) *Builder {
|
||
b.offset = (pageNum - 1) * pageSize
|
||
b.pageSize = pageSize
|
||
return b
|
||
}
|
||
|
||
// LockForUpdate 加锁, sqlte3不支持此操作
|
||
func (b *Builder) LockForUpdate(isLockForUpdate bool) *Builder {
|
||
b.isLockForUpdate = isLockForUpdate
|
||
return b
|
||
}
|
||
|
||
//拼接SQL,查询与筛选通用操作
|
||
func (b *Builder) whereAndHaving(where []WhereItem, paramList []any, isFromHaving bool) ([]string, []any) {
|
||
var whereList []string
|
||
for i := 0; i < len(where); i++ {
|
||
allFieldName := ""
|
||
if where[i].Prefix != "" {
|
||
allFieldName += where[i].Prefix + "."
|
||
}
|
||
|
||
//如果是mssql或者Postgres,并且来自having的话，需要特殊处理
|
||
if (b.driverName == model.Mssql || b.driverName == model.Postgres) && isFromHaving {
|
||
fieldNameCurrent := getFieldName(where[i].Field)
|
||
for m := 0; m < len(b.selectList); m++ {
|
||
if fieldNameCurrent == getFieldName(b.selectList[m].FieldNew) {
|
||
allFieldName += handleSelectWith(b.selectList[m])
|
||
}
|
||
}
|
||
} else {
|
||
allFieldName += getFieldName(where[i].Field)
|
||
}
|
||
|
||
if "**builder.Builder" == reflect.TypeOf(where[i].Val).String() {
|
||
executor := *(**Builder)(unsafe.Pointer(reflect.ValueOf(where[i].Val).Pointer()))
|
||
subSql, subParams := executor.GetSqlAndParams()
|
||
|
||
if where[i].Opt != Raw {
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+"("+subSql+")")
|
||
paramList = append(paramList, subParams...)
|
||
}
|
||
} else {
|
||
if where[i].Opt == Eq || where[i].Opt == Ne || where[i].Opt == Gt || where[i].Opt == Ge || where[i].Opt == Lt || where[i].Opt == Le {
|
||
if b.driverName == model.Sqlite3 {
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+"?")
|
||
} else {
|
||
switch where[i].Val.(type) {
|
||
case float32:
|
||
whereList = append(whereList, b.getConcatForFloat(allFieldName, "''")+" "+where[i].Opt+" "+"?")
|
||
case float64:
|
||
whereList = append(whereList, b.getConcatForFloat(allFieldName, "''")+" "+where[i].Opt+" "+"?")
|
||
default:
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+"?")
|
||
}
|
||
}
|
||
|
||
paramList = append(paramList, fmt.Sprintf("%v", where[i].Val))
|
||
}
|
||
|
||
if where[i].Opt == Between || where[i].Opt == NotBetween {
|
||
values := toAnyArr(where[i].Val)
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+"(?) AND (?)")
|
||
paramList = append(paramList, values...)
|
||
}
|
||
|
||
if where[i].Opt == Like || where[i].Opt == NotLike {
|
||
values := toAnyArr(where[i].Val)
|
||
var valueStr []string
|
||
for j := 0; j < len(values); j++ {
|
||
str := fmt.Sprintf("%v", values[j])
|
||
|
||
if "%" != str {
|
||
paramList = append(paramList, str)
|
||
valueStr = append(valueStr, "?")
|
||
} else {
|
||
valueStr = append(valueStr, "'"+str+"'")
|
||
}
|
||
}
|
||
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+b.getConcatForLike(valueStr...))
|
||
}
|
||
|
||
if where[i].Opt == In || where[i].Opt == NotIn {
|
||
values := toAnyArr(where[i].Val)
|
||
var placeholder []string
|
||
for j := 0; j < len(values); j++ {
|
||
placeholder = append(placeholder, "?")
|
||
}
|
||
|
||
whereList = append(whereList, allFieldName+" "+where[i].Opt+" "+"("+strings.Join(placeholder, ",")+")")
|
||
paramList = append(paramList, values...)
|
||
}
|
||
|
||
if where[i].Opt == Raw {
|
||
whereList = append(whereList, allFieldName+fmt.Sprintf("%v", where[i].Val))
|
||
}
|
||
|
||
if where[i].Opt == RawEq {
|
||
whereList = append(whereList, allFieldName+Eq+getPrefixByField(where[i].Val)+"."+getFieldName(where[i].Val))
|
||
}
|
||
}
|
||
}
|
||
return whereList, paramList
|
||
}
|
||
|
||
func (b *Builder) getConcatForFloat(vars ...string) string {
|
||
if b.driverName == model.Sqlite3 {
|
||
return strings.Join(vars, "||")
|
||
} else if b.driverName == model.Postgres {
|
||
return vars[0]
|
||
} else {
|
||
return "CONCAT(" + strings.Join(vars, ",") + ")"
|
||
}
|
||
}
|
||
|
||
func (b *Builder) getConcatForLike(vars ...string) string {
|
||
if b.driverName == model.Sqlite3 || b.driverName == model.Postgres {
|
||
return strings.Join(vars, "||")
|
||
} else {
|
||
return "CONCAT(" + strings.Join(vars, ",") + ")"
|
||
}
|
||
}
|