fix: fix inseart id auto increment(#2167)

engine.go

@@ -47,6 +47,9 @@ type Engine struct {
 	DatabaseTZ *time.Location // The timezone of the database
 
 	logSessionID bool // create session id
+
+	autoIncrementIncrement int64 // auto increment increment default 1
+	lastInsertIDReversed   bool  // create id reversed
 }
 
 // NewEngine new a db manager according to the parameter. Currently support four
@@ -71,16 +74,18 @@ func newEngine(driverName, dataSourceName string, dialect dialects.Dialect, db *
 	tagParser := tags.NewParser("xorm", dialect, mapper, mapper, cacherMgr)
 
 	engine := &Engine{
-		dialect:        dialect,
-		driver:         dialects.QueryDriver(driverName),
-		TZLocation:     time.Local,
-		defaultContext: context.Background(),
-		cacherMgr:      cacherMgr,
-		tagParser:      tagParser,
-		driverName:     driverName,
-		dataSourceName: dataSourceName,
-		db:             db,
-		logSessionID:   false,
+		dialect:                dialect,
+		driver:                 dialects.QueryDriver(driverName),
+		TZLocation:             time.Local,
+		defaultContext:         context.Background(),
+		cacherMgr:              cacherMgr,
+		tagParser:              tagParser,
+		driverName:             driverName,
+		dataSourceName:         dataSourceName,
+		db:                     db,
+		logSessionID:           false,
+		autoIncrementIncrement: 1,
+		lastInsertIDReversed:   false,
 	}
 
 	if dialect.URI().DBType == schemas.SQLITE {
@@ -144,6 +149,16 @@ func (engine *Engine) SetQuotePolicy(quotePolicy dialects.QuotePolicy) {
 	engine.dialect.SetQuotePolicy(quotePolicy)
 }
 
+// SetAutoIncrementIncrement set insert id auto increment increment
+func (engine *Engine) SetAutoIncrementIncrement(increment int64) {
+	engine.autoIncrementIncrement = increment
+}
+
+// SetLastInsertIDReversed set insert id reversed
+func (engine *Engine) SetLastInsertIDReversed(reversed bool) {
+	engine.lastInsertIDReversed = reversed
+}
+
 // BufferSize sets buffer size for iterate
 func (engine *Engine) BufferSize(size int) *Session {
 	session := engine.NewSession()

engine_group.go

@@ -206,6 +206,16 @@ func (eg *EngineGroup) SetQuotePolicy(quotePolicy dialects.QuotePolicy) {
 	}
 }
 
+// SetAutoIncrementIncrement set insert id auto increment increment
+func (eg *EngineGroup) SetAutoIncrementIncrement(increment int64) {
+	eg.autoIncrementIncrement = increment
+}
+
+// SetLastInsertIDReversed set insert id reversed
+func (eg *EngineGroup) SetLastInsertIDReversed(reversed bool) {
+	eg.lastInsertIDReversed = reversed
+}
+
 // SetTableMapper set the table name mapping rule
 func (eg *EngineGroup) SetTableMapper(mapper names.Mapper) {
 	eg.Engine.SetTableMapper(mapper)

interface.go

@@ -117,6 +117,8 @@ type EngineInterface interface {
 	SetTableMapper(names.Mapper)
 	SetTZDatabase(tz *time.Location)
 	SetTZLocation(tz *time.Location)
+	SetAutoIncrementIncrement(increment int64)
+	SetLastInsertIDReversed(reversed bool)
 	AddHook(hook contexts.Hook)
 	ShowSQL(show ...bool)
 	Sync(...interface{}) error

session_insert.go

@@ -210,33 +210,104 @@ func (session *Session) insertMultipleStruct(rowsSlicePtr interface{}) (int64, e
 
 	_ = session.cacheInsert(tableName)
 
-	lenAfterClosures := len(session.afterClosures)
-	for i := 0; i < size; i++ {
-		elemValue := reflect.Indirect(sliceValue.Index(i)).Addr().Interface()
+	var id int64
+	if table.AutoIncrement != "" {
+		id, err = res.LastInsertId()
+		if err != nil || id <= 0 {
+			return res.RowsAffected()
+		}
+	}
 
-		// handle AfterInsertProcessor
-		if session.isAutoCommit {
-			// !nashtsai! does user expect it's same slice to passed closure when using Before()/After() when insert multi??
-			for _, closure := range session.afterClosures {
-				closure(elemValue)
-			}
-			if processor, ok := elemValue.(AfterInsertProcessor); ok {
-				processor.AfterInsert()
-			}
-		} else {
-			if lenAfterClosures > 0 {
-				if value, has := session.afterInsertBeans[elemValue]; has && value != nil {
-					*value = append(*value, session.afterClosures...)
-				} else {
-					afterClosures := make([]func(interface{}), lenAfterClosures)
-					copy(afterClosures, session.afterClosures)
-					session.afterInsertBeans[elemValue] = &afterClosures
+	lenAfterClosures := len(session.afterClosures)
+	if session.engine.lastInsertIDReversed {
+		for i := size - 1; i >= 0; i-- {
+			elemValue := reflect.Indirect(sliceValue.Index(i)).Addr().Interface()
+
+			// handle AfterInsertProcessor
+			if session.isAutoCommit {
+				// !nashtsai! does user expect it's same slice to passed closure when using Before()/After() when insert multi??
+				for _, closure := range session.afterClosures {
+					closure(elemValue)
+				}
+				if processor, ok := elemValue.(AfterInsertProcessor); ok {
+					processor.AfterInsert()
 				}
 			} else {
-				if _, ok := elemValue.(AfterInsertProcessor); ok {
-					session.afterInsertBeans[elemValue] = nil
+				if lenAfterClosures > 0 {
+					if value, has := session.afterInsertBeans[elemValue]; has && value != nil {
+						*value = append(*value, session.afterClosures...)
+					} else {
+						afterClosures := make([]func(interface{}), lenAfterClosures)
+						copy(afterClosures, session.afterClosures)
+						session.afterInsertBeans[elemValue] = &afterClosures
+					}
+				} else {
+					if _, ok := elemValue.(AfterInsertProcessor); ok {
+						session.afterInsertBeans[elemValue] = nil
+					}
 				}
 			}
+
+			// handle auto increment
+			aiValue, err := table.AutoIncrColumn().ValueOf(elemValue)
+			if err != nil {
+				session.engine.logger.Errorf("%v", err)
+			}
+
+			if aiValue == nil || !aiValue.IsValid() || !aiValue.CanSet() {
+				continue
+			}
+
+			if err := convert.AssignValue(*aiValue, id); err != nil {
+				return 0, err
+			}
+
+			id -= session.engine.autoIncrementIncrement
+		}
+	} else {
+		for i := 0; i < size; i++ {
+			elemValue := reflect.Indirect(sliceValue.Index(i)).Addr().Interface()
+
+			// handle AfterInsertProcessor
+			if session.isAutoCommit {
+				// !nashtsai! does user expect it's same slice to passed closure when using Before()/After() when insert multi??
+				for _, closure := range session.afterClosures {
+					closure(elemValue)
+				}
+				if processor, ok := elemValue.(AfterInsertProcessor); ok {
+					processor.AfterInsert()
+				}
+			} else {
+				if lenAfterClosures > 0 {
+					if value, has := session.afterInsertBeans[elemValue]; has && value != nil {
+						*value = append(*value, session.afterClosures...)
+					} else {
+						afterClosures := make([]func(interface{}), lenAfterClosures)
+						copy(afterClosures, session.afterClosures)
+						session.afterInsertBeans[elemValue] = &afterClosures
+					}
+				} else {
+					if _, ok := elemValue.(AfterInsertProcessor); ok {
+						session.afterInsertBeans[elemValue] = nil
+					}
+				}
+			}
+
+			// handle auto increment
+			aiValue, err := table.AutoIncrColumn().ValueOf(elemValue)
+			if err != nil {
+				session.engine.logger.Errorf("%v", err)
+			}
+
+			if aiValue == nil || !aiValue.IsValid() || !aiValue.CanSet() {
+				continue
+			}
+
+			if err := convert.AssignValue(*aiValue, id); err != nil {
+				return 0, err
+			}
+
+			id += session.engine.autoIncrementIncrement
 		}
 	}