forked from mirror/gorm
92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
package gorm
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import (
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"fmt"
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"reflect"
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"strings"
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)
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func BeginTransaction(scope *Scope) {
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scope.Begin()
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}
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func CommitOrRollbackTransaction(scope *Scope) {
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scope.CommitOrRollback()
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}
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func SaveBeforeAssociations(scope *Scope) {
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for _, field := range scope.Fields() {
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if !field.IsBlank && !field.IsIgnored {
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if relationship := field.Relationship; relationship != nil && relationship.Kind == "belongs_to" {
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value := field.Field
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scope.Err(scope.NewDB().Save(value.Addr().Interface()).Error)
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if relationship.ForeignFieldName != "" {
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scope.Err(scope.SetColumn(relationship.ForeignFieldName, scope.New(value.Addr().Interface()).PrimaryKeyValue()))
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}
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}
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}
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}
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}
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func SaveAfterAssociations(scope *Scope) {
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for _, field := range scope.Fields() {
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if !field.IsBlank && !field.IsIgnored {
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if relationship := field.Relationship; relationship != nil &&
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(relationship.Kind == "has_one" || relationship.Kind == "has_many" || relationship.Kind == "many_to_many") {
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value := field.Field
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switch value.Kind() {
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case reflect.Slice:
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for i := 0; i < value.Len(); i++ {
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newDB := scope.NewDB()
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elem := value.Index(i).Addr().Interface()
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newScope := newDB.NewScope(elem)
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if relationship.JoinTable == "" && relationship.ForeignFieldName != "" {
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scope.Err(newScope.SetColumn(relationship.ForeignFieldName, scope.PrimaryKeyValue()))
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}
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if relationship.PolymorphicType != "" {
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scope.Err(newScope.SetColumn(relationship.PolymorphicType, scope.TableName()))
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}
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scope.Err(newDB.Save(elem).Error)
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if joinTable := relationship.JoinTable; joinTable != "" {
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quotedForeignDBName := scope.Quote(relationship.ForeignDBName)
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foreignValue := scope.PrimaryKeyValue()
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quoteAssociationForeignDBName := scope.Quote(relationship.AssociationForeignDBName)
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associationForeignValue := newScope.PrimaryKeyValue()
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newScope.Raw(fmt.Sprintf(
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"INSERT INTO %v (%v) SELECT %v %v WHERE NOT EXISTS (SELECT * FROM %v WHERE %v = %v AND %v = %v);",
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joinTable,
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strings.Join([]string{quotedForeignDBName, quoteAssociationForeignDBName}, ","),
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strings.Join([]string{newScope.AddToVars(foreignValue), newScope.AddToVars(associationForeignValue)}, ","),
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scope.Dialect().SelectFromDummyTable(),
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joinTable,
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quotedForeignDBName,
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newScope.AddToVars(foreignValue),
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quoteAssociationForeignDBName,
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newScope.AddToVars(associationForeignValue),
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))
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scope.Err(scope.NewDB().Exec(newScope.Sql, newScope.SqlVars...).Error)
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}
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}
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default:
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elem := value.Addr().Interface()
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newScope := scope.New(elem)
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if relationship.ForeignFieldName != "" {
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scope.Err(newScope.SetColumn(relationship.ForeignFieldName, scope.PrimaryKeyValue()))
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}
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if relationship.PolymorphicType != "" {
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scope.Err(newScope.SetColumn(relationship.PolymorphicType, scope.TableName()))
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}
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scope.Err(scope.NewDB().Save(elem).Error)
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}
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}
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}
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}
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}
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