Add returning tests

callbacks/update.go

@@ -84,7 +84,10 @@ func Update(config *Config) func(db *gorm.DB) {
 		if !db.DryRun && db.Error == nil {
 			if ok, mode := hasReturning(db, supportReturning); ok {
 				if rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...); db.AddError(err) == nil {
+					dest := db.Statement.Dest
+					db.Statement.Dest = db.Statement.ReflectValue.Addr().Interface()
 					gorm.Scan(rows, db, mode)
+					db.Statement.Dest = dest
 					rows.Close()
 				}
 			} else {
@@ -152,20 +155,23 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 	if !updatingValue.CanAddr() || stmt.Dest != stmt.Model {
 		switch stmt.ReflectValue.Kind() {
 		case reflect.Slice, reflect.Array:
-			var primaryKeyExprs []clause.Expression
-			for i := 0; i < stmt.ReflectValue.Len(); i++ {
-				var exprs = make([]clause.Expression, len(stmt.Schema.PrimaryFields))
-				var notZero bool
-				for idx, field := range stmt.Schema.PrimaryFields {
-					value, isZero := field.ValueOf(stmt.ReflectValue.Index(i))
-					exprs[idx] = clause.Eq{Column: field.DBName, Value: value}
-					notZero = notZero || !isZero
-				}
-				if notZero {
-					primaryKeyExprs = append(primaryKeyExprs, clause.And(exprs...))
+			if size := stmt.ReflectValue.Len(); size > 0 {
+				var primaryKeyExprs []clause.Expression
+				for i := 0; i < stmt.ReflectValue.Len(); i++ {
+					var exprs = make([]clause.Expression, len(stmt.Schema.PrimaryFields))
+					var notZero bool
+					for idx, field := range stmt.Schema.PrimaryFields {
+						value, isZero := field.ValueOf(stmt.ReflectValue.Index(i))
+						exprs[idx] = clause.Eq{Column: field.DBName, Value: value}
+						notZero = notZero || !isZero
+					}
+					if notZero {
+						primaryKeyExprs = append(primaryKeyExprs, clause.And(exprs...))
+					}
 				}
+
+				stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Or(primaryKeyExprs...)}})
 			}
-			stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Or(primaryKeyExprs...)}})
 		case reflect.Struct:
 			for _, field := range stmt.Schema.PrimaryFields {
 				if value, isZero := field.ValueOf(stmt.ReflectValue); !isZero {

scan.go

@@ -120,22 +120,6 @@ func Scan(rows *sql.Rows, db *DB, mode ScanMode) {
 
 	switch dest := db.Statement.Dest.(type) {
 	case map[string]interface{}, *map[string]interface{}:
-		if update && db.Statement.Schema != nil {
-			switch db.Statement.ReflectValue.Kind() {
-			case reflect.Struct:
-				fields := make([]*schema.Field, len(columns))
-				for idx, column := range columns {
-					if field := db.Statement.Schema.LookUpField(column); field != nil && field.Readable {
-						fields[idx] = field
-					}
-				}
-
-				if initialized || rows.Next() {
-					db.scanIntoStruct(db.Statement.Schema, rows, db.Statement.ReflectValue, values, columns, fields, nil)
-				}
-			}
-		}
-
 		if initialized || rows.Next() {
 			columnTypes, _ := rows.ColumnTypes()
 			prepareValues(values, db, columnTypes, columns)

soft_delete.go

@@ -159,6 +159,6 @@ func (sd SoftDeleteDeleteClause) ModifyStatement(stmt *Statement) {
 		}
 
 		stmt.AddClauseIfNotExists(clause.Update{})
-		stmt.Build("UPDATE", "SET", "WHERE")
+		stmt.Build(stmt.DB.Callback().Update().Clauses...)
 	}
 }

tests/delete_test.go

@@ -205,3 +205,54 @@ func TestDeleteSliceWithAssociations(t *testing.T) {
 		}
 	}
 }
+
+// only sqlite, postgres support returning
+func TestSoftDeleteReturning(t *testing.T) {
+	if DB.Dialector.Name() != "sqlite" && DB.Dialector.Name() != "postgres" {
+		return
+	}
+
+	users := []*User{
+		GetUser("delete-returning-1", Config{}),
+		GetUser("delete-returning-2", Config{}),
+		GetUser("delete-returning-3", Config{}),
+	}
+	DB.Create(&users)
+
+	var results []User
+	DB.Where("name IN ?", []string{users[0].Name, users[1].Name}).Clauses(clause.Returning{}).Delete(&results)
+	if len(results) != 2 {
+		t.Errorf("failed to return delete data, got %v", results)
+	}
+
+	var count int64
+	DB.Model(&User{}).Where("name IN ?", []string{users[0].Name, users[1].Name, users[2].Name}).Count(&count)
+	if count != 1 {
+		t.Errorf("failed to delete data, current count %v", count)
+	}
+}
+
+func TestDeleteReturning(t *testing.T) {
+	if DB.Dialector.Name() != "sqlite" && DB.Dialector.Name() != "postgres" {
+		return
+	}
+
+	companies := []Company{
+		{Name: "delete-returning-1"},
+		{Name: "delete-returning-2"},
+		{Name: "delete-returning-3"},
+	}
+	DB.Create(&companies)
+
+	var results []Company
+	DB.Where("name IN ?", []string{companies[0].Name, companies[1].Name}).Clauses(clause.Returning{}).Delete(&results)
+	if len(results) != 2 {
+		t.Errorf("failed to return delete data, got %v", results)
+	}
+
+	var count int64
+	DB.Model(&Company{}).Where("name IN ?", []string{companies[0].Name, companies[1].Name, companies[2].Name}).Count(&count)
+	if count != 1 {
+		t.Errorf("failed to delete data, current count %v", count)
+	}
+}

tests/go.mod

@@ -7,8 +7,8 @@ require (
 	github.com/jinzhu/now v1.1.2
 	github.com/lib/pq v1.10.3
 	gorm.io/driver/mysql v1.1.2
-	gorm.io/driver/postgres v1.2.0
-	gorm.io/driver/sqlite v1.2.0
+	gorm.io/driver/postgres v1.2.1
+	gorm.io/driver/sqlite v1.2.2
 	gorm.io/driver/sqlserver v1.1.2
 	gorm.io/gorm v1.22.0
 )

tests/update_test.go

@@ -167,16 +167,13 @@ func TestUpdates(t *testing.T) {
 	}
 
 	// update with gorm exprs
-	if err := DB.Model(&user3).Clauses(clause.Returning{Columns: []clause.Column{{Name: "age"}}}).Updates(map[string]interface{}{"age": gorm.Expr("age + ?", 100)}).Error; err != nil {
+	if err := DB.Model(&user3).Updates(map[string]interface{}{"age": gorm.Expr("age + ?", 100)}).Error; err != nil {
 		t.Errorf("Not error should happen when updating with gorm expr, but got %v", err)
 	}
 	var user4 User
 	DB.First(&user4, user3.ID)
 
-	// sqlite, postgres support returning
-	if DB.Dialector.Name() != "sqlite" && DB.Dialector.Name() != "postgres" {
-		user3.Age += 100
-	}
+	user3.Age += 100
 	AssertObjEqual(t, user4, user3, "UpdatedAt", "Age")
 }
 
@@ -728,3 +725,35 @@ func TestSaveWithPrimaryValue(t *testing.T) {
 		t.Errorf("failed to find created record, got error: %v, result: %+v", err, result4)
 	}
 }
+
+// only sqlite, postgres support returning
+func TestUpdateReturning(t *testing.T) {
+	if DB.Dialector.Name() != "sqlite" && DB.Dialector.Name() != "postgres" {
+		return
+	}
+
+	users := []*User{
+		GetUser("update-returning-1", Config{}),
+		GetUser("update-returning-2", Config{}),
+		GetUser("update-returning-3", Config{}),
+	}
+	DB.Create(&users)
+
+	var results []User
+	DB.Model(&results).Where("name IN ?", []string{users[0].Name, users[1].Name}).Clauses(clause.Returning{}).Update("age", 88)
+	if len(results) != 2 || results[0].Age != 88 || results[1].Age != 88 {
+		t.Errorf("failed to return updated data, got %v", results)
+	}
+
+	if err := DB.Model(&results[0]).Updates(map[string]interface{}{"age": gorm.Expr("age + ?", 100)}).Error; err != nil {
+		t.Errorf("Not error should happen when updating with gorm expr, but got %v", err)
+	}
+
+	if err := DB.Model(&results[1]).Clauses(clause.Returning{Columns: []clause.Column{{Name: "age"}}}).Updates(map[string]interface{}{"age": gorm.Expr("age + ?", 100)}).Error; err != nil {
+		t.Errorf("Not error should happen when updating with gorm expr, but got %v", err)
+	}
+
+	if results[1].Age-results[0].Age != 100 {
+		t.Errorf("failed to return updated age column")
+	}
+}