Merge pull request #48 from nashtsai/master

code tidy up, minor performance improvement

engine.go

@@ -590,7 +590,7 @@ func (engine *Engine) mapType(t reflect.Type) *Table {
 			sqlType := Type2SQLType(fieldType)
 			col = &Column{engine.columnMapper.Obj2Table(t.Field(i).Name), t.Field(i).Name, sqlType,
 				sqlType.DefaultLength, sqlType.DefaultLength2, true, "", make(map[string]bool), false, false,
-				TWOSIDES, false, false, false, false}
+				TWOSIDES, false, false, false, false, nil}
 		}
 		if col.IsAutoIncrement {
 			col.Nullable = false

session.go

@@ -1092,23 +1092,39 @@ func (session *Session) Find(rowsSlicePtr interface{}, condiBean ...interface{})
 
 		fieldsCount := len(fields)
 
-		for rawRows.Next() {
-			var newValue reflect.Value
+		var newElemFunc func() reflect.Value
 		if sliceElementType.Kind() == reflect.Ptr {
-				newValue = reflect.New(sliceElementType.Elem())
-			} else {
-				newValue = reflect.New(sliceElementType)
+			newElemFunc = func() reflect.Value {
+				return reflect.New(sliceElementType.Elem())
 			}
+		} else {
+			newElemFunc = func() reflect.Value {
+				return reflect.New(sliceElementType)
+			}
+		}
+
+		var sliceValueSetFunc func(*reflect.Value)
+
+		if sliceValue.Kind() == reflect.Slice {
+			if sliceElementType.Kind() == reflect.Ptr {
+				sliceValueSetFunc = func(newValue *reflect.Value) {
+					sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(newValue.Interface())))
+				}
+			} else {
+				sliceValueSetFunc = func(newValue *reflect.Value) {
+					sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(newValue.Interface()))))
+				}
+			}
+		}
+
+		for rawRows.Next() {
+			var newValue reflect.Value = newElemFunc()
+			if sliceValueSetFunc != nil {
 				err := session.row2Bean(rawRows, fields, fieldsCount, newValue.Interface())
 				if err != nil {
 					return err
 				}
-			if sliceValue.Kind() == reflect.Slice {
-				if sliceElementType.Kind() == reflect.Ptr {
-					sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(newValue.Interface())))
-				} else {
-					sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(newValue.Interface()))))
-				}
+				sliceValueSetFunc(&newValue)
 			}
 		}
 	} else {
@@ -1347,22 +1363,24 @@ func row2map(rows *sql.Rows, fields []string) (resultsMap map[string][]byte, err
 
 func (session *Session) getField(dataStruct *reflect.Value, key string, table *Table) *reflect.Value {
 
-	key = strings.ToLower(key)
-	if _, ok := table.Columns[key]; !ok {
+	//key = strings.ToLower(key)
+	if col, ok := table.Columns[key]; !ok {
 		session.Engine.LogWarn(fmt.Sprintf("table %v's has not column %v. %v", table.Name, key, table.ColumnsSeq))
 		return nil
-	}
-	col := table.Columns[key]
+	} else {
 		fieldName := col.FieldName
-	fieldPath := strings.Split(fieldName, ".")
+		if col.fieldPath == nil {
+			col.fieldPath = strings.Split(fieldName, ".")
+		}
 		var fieldValue reflect.Value
-	if len(fieldPath) > 2 {
+		fieldPathLen := len(col.fieldPath)
+		if fieldPathLen > 2 {
 			session.Engine.LogError("Unsupported mutliderive", fieldName)
 			return nil
-	} else if len(fieldPath) == 2 {
-		parentField := dataStruct.FieldByName(fieldPath[0])
+		} else if fieldPathLen == 2 {
+			parentField := dataStruct.FieldByName(col.fieldPath[0])
 			if parentField.IsValid() {
-			fieldValue = parentField.FieldByName(fieldPath[1])
+				fieldValue = parentField.FieldByName(col.fieldPath[1])
 			}
 		} else {
 			fieldValue = dataStruct.FieldByName(fieldName)
@@ -1374,6 +1392,7 @@ func (session *Session) getField(dataStruct *reflect.Value, key string, table *T
 		}
 		return &fieldValue
 	}
+}
 
 func (session *Session) row2Bean(rows *sql.Rows, fields []string, fieldsCount int, bean interface{}) error {
 
@@ -1395,7 +1414,6 @@ func (session *Session) row2Bean(rows *sql.Rows, fields []string, fieldsCount in
 
 	for ii, key := range fields {
 		if fieldValue := session.getField(&dataStruct, key, table); fieldValue != nil {
-
 			rawValue := reflect.Indirect(reflect.ValueOf(scanResultContainers[ii]))
 
 			//if row is null then ignore

table.go

@@ -275,6 +275,7 @@ type Column struct {
 	IsUpdated       bool
 	IsCascade       bool
 	IsVersion       bool
+	fieldPath       []string
 }
 
 // generate column description string according dialect