Test CreateWithNoGORMPrimayKey

callbacks/create.go

@@ -64,7 +64,7 @@ func Create(config *Config) func(db *gorm.DB) {
 			result, err := db.Statement.ConnPool.ExecContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
 
 			if err == nil {
-				if db.Statement.Schema != nil {
+				if db.Statement.Schema != nil && db.Statement.Schema.PrioritizedPrimaryField != nil {
 					if _, ok := db.Statement.Schema.FieldsWithDefaultDBValue[db.Statement.Schema.PrioritizedPrimaryField.DBName]; ok {
 						if insertID, err := result.LastInsertId(); err == nil {
 							switch db.Statement.ReflectValue.Kind() {

dialects/mssql/create.go

@@ -68,26 +68,30 @@ func Create(db *gorm.DB) {
 
 		switch db.Statement.ReflectValue.Kind() {
 		case reflect.Slice, reflect.Array:
-			for rows.Next() {
-				// for idx, field := range fields {
-				// 	values[idx] = field.ReflectValueOf(db.Statement.ReflectValue.Index(int(db.RowsAffected))).Addr().Interface()
-				// }
+			if len(db.Statement.Schema.PrimaryFields) > 0 {
+				values := make([]interface{}, len(db.Statement.Schema.PrimaryFields))
 
-				values := db.Statement.Schema.PrioritizedPrimaryField.ReflectValueOf(db.Statement.ReflectValue.Index(int(db.RowsAffected))).Addr().Interface()
-				if err := rows.Scan(values); err != nil {
-					db.AddError(err)
+				for rows.Next() {
+					for idx, field := range db.Statement.Schema.PrimaryFields {
+						values[idx] = field.ReflectValueOf(db.Statement.ReflectValue.Index(int(db.RowsAffected))).Addr().Interface()
+					}
+
+					db.RowsAffected++
+					db.AddError(rows.Scan(values...))
 				}
-				db.RowsAffected++
 			}
 		case reflect.Struct:
-			// for idx, field := range fields {
-			// 	values[idx] = field.ReflectValueOf(db.Statement.ReflectValue).Addr().Interface()
-			// }
-			values := db.Statement.Schema.PrioritizedPrimaryField.ReflectValueOf(db.Statement.ReflectValue).Addr().Interface()
+			if len(db.Statement.Schema.PrimaryFields) > 0 {
+				values := make([]interface{}, len(db.Statement.Schema.PrimaryFields))
 
-			if rows.Next() {
-				db.RowsAffected++
-				db.AddError(rows.Scan(values))
+				for idx, field := range db.Statement.Schema.PrimaryFields {
+					values[idx] = field.ReflectValueOf(db.Statement.ReflectValue).Addr().Interface()
+				}
+
+				if rows.Next() {
+					db.RowsAffected++
+					db.AddError(rows.Scan(values...))
+				}
 			}
 		}
 	} else {
@@ -177,8 +181,14 @@ func MergeCreate(db *gorm.DB, onConflict clause.OnConflict) {
 }
 
 func outputInserted(db *gorm.DB) {
-	if db.Statement.Schema.PrioritizedPrimaryField != nil {
-		db.Statement.WriteString(" OUTPUT INSERTED.")
-		db.Statement.WriteQuoted(db.Statement.Schema.PrioritizedPrimaryField.DBName)
+	if len(db.Statement.Schema.PrimaryFields) > 0 {
+		db.Statement.WriteString(" OUTPUT ")
+		for idx, field := range db.Statement.Schema.PrimaryFields {
+			if idx > 0 {
+				db.Statement.WriteString(",")
+			}
+			db.Statement.WriteString(" INSERTED.")
+			db.Statement.AddVar(db.Statement, clause.Column{Name: field.DBName})
+		}
 	}
 }

migrator/migrator.go

@@ -149,7 +149,7 @@ func (m Migrator) CreateTable(values ...interface{}) error {
 				createTableSQL += ","
 			}
 
-			if !hasPrimaryKeyInDataType {
+			if !hasPrimaryKeyInDataType && len(stmt.Schema.PrimaryFields) > 0 {
 				createTableSQL += "PRIMARY KEY ?,"
 				primaryKeys := []interface{}{}
 				for _, field := range stmt.Schema.PrimaryFields {

tests/create_test.go

@@ -245,3 +245,21 @@ func TestCreateWithNowFuncOverride(t *testing.T) {
 	AssertEqual(t, newUser.CreatedAt, curTime)
 	AssertEqual(t, newUser.UpdatedAt, curTime)
 }
+
+func TestCreateWithNoGORMPrimayKey(t *testing.T) {
+	type JoinTable struct {
+		UserID   uint
+		FriendID uint
+	}
+
+	DB.Migrator().DropTable(&JoinTable{})
+	if err := DB.AutoMigrate(&JoinTable{}); err != nil {
+		t.Errorf("no error should happen when auto migrate, but got %v", err)
+	}
+
+	jt := JoinTable{UserID: 1, FriendID: 2}
+	err := DB.Create(&jt).Error
+	if err != nil {
+		t.Errorf("No error should happen when create a record without a GORM primary key. But in the database this primary key exists and is the union of 2 or more fields\n But got: %s", err)
+	}
+}

tests/scanner_valuer_test.go

@@ -34,6 +34,7 @@ func TestScannerValuer(t *testing.T) {
 			{"name1", "value1"},
 			{"name2", "value2"},
 		},
+		Role: Role{Name: "admin"},
 	}
 
 	if err := DB.Create(&data).Error; err != nil {
@@ -91,6 +92,7 @@ type ScannerValuerStruct struct {
 	Num      Num
 	Strings  StringsSlice
 	Structs  StructsSlice
+	Role     Role
 }
 
 type EncryptedData []byte
@@ -176,3 +178,24 @@ func (l *StructsSlice) Scan(input interface{}) error {
 		return errors.New("not supported")
 	}
 }
+
+type Role struct {
+	Name string `gorm:"size:256"`
+}
+
+func (role *Role) Scan(value interface{}) error {
+	if b, ok := value.([]uint8); ok {
+		role.Name = string(b)
+	} else {
+		role.Name = value.(string)
+	}
+	return nil
+}
+
+func (role Role) Value() (driver.Value, error) {
+	return role.Name, nil
+}
+
+func (role Role) IsAdmin() bool {
+	return role.Name == "admin"
+}