diff --git a/association_test.go b/association_test.go
index 29a65292..ab3abd91 100644
--- a/association_test.go
+++ b/association_test.go
@@ -293,6 +293,34 @@ func TestHasOne(t *testing.T) {
 	if DB.Model(&user).Association("CreditCard").Count() != 0 {
 		t.Errorf("User's credit card count should be 0 after Clear")
 	}
+
+	// Check Association mode with soft delete
+	var creditcard6 = CreditCard{
+		Number: "411111111116",
+	}
+	DB.Model(&user).Association("CreditCard").Append(&creditcard6)
+
+	if count := DB.Model(&user).Association("CreditCard").Count(); count != 1 {
+		t.Errorf("User's credit card count should be 1 after Append, but got %v", count)
+	}
+
+	DB.Delete(&creditcard6)
+
+	if count := DB.Model(&user).Association("CreditCard").Count(); count != 0 {
+		t.Errorf("User's credit card count should be 0 after credit card deleted, but got %v", count)
+	}
+
+	if err := DB.Model(&user).Association("CreditCard").Find(&CreditCard{}).Error; err == nil {
+		t.Errorf("User's creditcard is not findable after Delete")
+	}
+
+	if count := DB.Unscoped().Model(&user).Association("CreditCard").Count(); count != 1 {
+		t.Errorf("User's credit card count should be 1 when query with Unscoped, but got %v", count)
+	}
+
+	if err := DB.Unscoped().Model(&user).Association("CreditCard").Find(&CreditCard{}).Error; err != nil {
+		t.Errorf("User's creditcard should be findable when query with Unscoped, got %v", err)
+	}
 }
 
 func TestHasMany(t *testing.T) {
@@ -402,6 +430,36 @@ func TestHasMany(t *testing.T) {
 	if len(comments51) != 0 {
 		t.Errorf("Clear has many relations")
 	}
+
+	// Check Association mode with soft delete
+	var comment6 = Comment{
+		Content: "comment 6",
+	}
+	DB.Model(&post).Association("Comments").Append(&comment6)
+
+	if count := DB.Model(&post).Association("Comments").Count(); count != 1 {
+		t.Errorf("post's comments count should be 1 after Append, but got %v", count)
+	}
+
+	DB.Delete(&comment6)
+
+	if count := DB.Model(&post).Association("Comments").Count(); count != 0 {
+		t.Errorf("post's comments count should be 0 after comment been deleted, but got %v", count)
+	}
+
+	var comments6 []Comment
+	if DB.Model(&post).Association("Comments").Find(&comments6); len(comments6) != 0 {
+		t.Errorf("post's comments count should be 0 when find with Find, but got %v", len(comments6))
+	}
+
+	if count := DB.Unscoped().Model(&post).Association("Comments").Count(); count != 1 {
+		t.Errorf("post's comments count should be 1 when query with Unscoped, but got %v", count)
+	}
+
+	var comments61 []Comment
+	if DB.Unscoped().Model(&post).Association("Comments").Find(&comments61); len(comments61) != 1 {
+		t.Errorf("post's comments count should be 1 when query with Unscoped, but got %v", len(comments61))
+	}
 }
 
 func TestManyToMany(t *testing.T) {
@@ -500,6 +558,36 @@ func TestManyToMany(t *testing.T) {
 	if len(user.Languages) != 0 || DB.Model(&user).Association("Languages").Count() != 0 {
 		t.Errorf("Relations should be cleared")
 	}
+
+	// Check Association mode with soft delete
+	var language6 = Language{
+		Name: "language 6",
+	}
+	DB.Model(&user).Association("Languages").Append(&language6)
+
+	if count := DB.Model(&user).Association("Languages").Count(); count != 1 {
+		t.Errorf("user's languages count should be 1 after Append, but got %v", count)
+	}
+
+	DB.Delete(&language6)
+
+	if count := DB.Model(&user).Association("Languages").Count(); count != 0 {
+		t.Errorf("user's languages count should be 0 after language been deleted, but got %v", count)
+	}
+
+	var languages6 []Language
+	if DB.Model(&user).Association("Languages").Find(&languages6); len(languages6) != 0 {
+		t.Errorf("user's languages count should be 0 when find with Find, but got %v", len(languages6))
+	}
+
+	if count := DB.Unscoped().Model(&user).Association("Languages").Count(); count != 1 {
+		t.Errorf("user's languages count should be 1 when query with Unscoped, but got %v", count)
+	}
+
+	var languages61 []Language
+	if DB.Unscoped().Model(&user).Association("Languages").Find(&languages61); len(languages61) != 1 {
+		t.Errorf("user's languages count should be 1 when query with Unscoped, but got %v", len(languages61))
+	}
 }
 
 func TestRelated(t *testing.T) {
diff --git a/callback_delete.go b/callback_delete.go
index 72236659..8e56196b 100644
--- a/callback_delete.go
+++ b/callback_delete.go
@@ -8,7 +8,7 @@ func BeforeDelete(scope *Scope) {
 
 func Delete(scope *Scope) {
 	if !scope.HasError() {
-		if !scope.Search.Unscoped && scope.HasColumn("DeletedAt") {
+		if !scope.db.unscoped && scope.HasColumn("DeletedAt") {
 			scope.Raw(
 				fmt.Sprintf("UPDATE %v SET deleted_at=%v %v",
 					scope.QuotedTableName(),
diff --git a/main.go b/main.go
index 9fe6cf4e..d84c139b 100644
--- a/main.go
+++ b/main.go
@@ -28,6 +28,7 @@ type DB struct {
 	parent            *DB
 	search            *search
 	logMode           int
+	unscoped          bool
 	logger            logger
 	dialect           Dialect
 	singularTable     bool
@@ -186,7 +187,9 @@ func (s *DB) Scopes(funcs ...func(*DB) *DB) *DB {
 }
 
 func (s *DB) Unscoped() *DB {
-	return s.clone().search.unscoped().db
+	clone := s.clone()
+	clone.unscoped = true
+	return clone
 }
 
 func (s *DB) Attrs(attrs ...interface{}) *DB {
@@ -434,7 +437,7 @@ func (s *DB) DropColumn(column string) *DB {
 }
 
 func (s *DB) AddIndex(indexName string, column ...string) *DB {
-	scope := s.clone().NewScope(s.Value)
+	scope := s.Unscoped().NewScope(s.Value)
 	scope.addIndex(false, indexName, column...)
 	return scope.db
 }
diff --git a/main_private.go b/main_private.go
index bd097ce0..3431de81 100644
--- a/main_private.go
+++ b/main_private.go
@@ -3,7 +3,7 @@ package gorm
 import "time"
 
 func (s *DB) clone() *DB {
-	db := DB{db: s.db, parent: s.parent, logger: s.logger, logMode: s.logMode, values: map[string]interface{}{}, Value: s.Value, Error: s.Error}
+	db := DB{db: s.db, parent: s.parent, logger: s.logger, logMode: s.logMode, unscoped: s.unscoped, values: map[string]interface{}{}, Value: s.Value, Error: s.Error}
 
 	for key, value := range s.values {
 		db.values[key] = value
diff --git a/scope_private.go b/scope_private.go
index d893c095..36292423 100644
--- a/scope_private.go
+++ b/scope_private.go
@@ -161,7 +161,7 @@ func (scope *Scope) buildSelectQuery(clause map[string]interface{}) (str string)
 func (scope *Scope) whereSql() (sql string) {
 	var primaryConditions, andConditions, orConditions []string
 
-	if !scope.Search.Unscoped && scope.Fields()["deleted_at"] != nil {
+	if !scope.db.unscoped && scope.Fields()["deleted_at"] != nil {
 		sql := fmt.Sprintf("(%v.deleted_at IS NULL OR %v.deleted_at <= '0001-01-02')", scope.QuotedTableName(), scope.QuotedTableName())
 		primaryConditions = append(primaryConditions, sql)
 	}
@@ -601,9 +601,7 @@ func (scope *Scope) addIndex(unique bool, indexName string, column ...string) {
 		sqlCreate = "CREATE UNIQUE INDEX"
 	}
 
-	scope.Search.Unscoped = true
 	scope.Raw(fmt.Sprintf("%s %v ON %v(%v) %v", sqlCreate, indexName, scope.QuotedTableName(), strings.Join(columns, ", "), scope.whereSql())).Exec()
-	scope.Search.Unscoped = false
 }
 
 func (scope *Scope) addForeignKey(field string, dest string, onDelete string, onUpdate string) {
@@ -659,11 +657,11 @@ func (scope *Scope) autoIndex() *Scope {
 	}
 
 	for name, columns := range indexes {
-		scope.addIndex(false, name, columns...)
+		scope.NewDB().Model(scope.Value).AddIndex(name, columns...)
 	}
 
 	for name, columns := range uniqueIndexes {
-		scope.addIndex(true, name, columns...)
+		scope.NewDB().Model(scope.Value).AddUniqueIndex(name, columns...)
 	}
 
 	return scope
diff --git a/search.go b/search.go
index 166b9a86..cabce05c 100644
--- a/search.go
+++ b/search.go
@@ -20,7 +20,6 @@ type search struct {
 	group            string
 	tableName        string
 	raw              bool
-	Unscoped         bool
 	countingQuery    bool
 }
 
@@ -124,11 +123,6 @@ func (s *search) Raw(b bool) *search {
 	return s
 }
 
-func (s *search) unscoped() *search {
-	s.Unscoped = true
-	return s
-}
-
 func (s *search) Table(name string) *search {
 	s.tableName = name
 	return s
diff --git a/structs_test.go b/structs_test.go
index 8f529952..20666740 100644
--- a/structs_test.go
+++ b/structs_test.go
@@ -66,7 +66,7 @@ type Address struct {
 }
 
 type Language struct {
-	Id    int
+	gorm.Model
 	Name  string
 	Users []User `gorm:"many2many:user_languages;"`
 }