Refactor Callback

callback.go

@@ -4,34 +4,45 @@ import (
 	"fmt"
 )
 
-type callback struct {
+// defaultCallbacks hold default callbacks defined by gorm
+var defaultCallbacks = &Callbacks{}
+
+// Callbacks contains callbacks that used when CURD objects
+//   Field `creates` hold callbacks will be call when creating object
+//   Field `updates` hold callbacks will be call when updating object
+//   Field `deletes` hold callbacks will be call when deleting object
+//   Field `queries` hold callbacks will be call when querying object with query methods like Find, First, Related, Association...
+//   Field `rowQueries` hold callbacks will be call when querying object with Row, Rows...
+//   Field `processors` hold all callback processors, will be used to generate above callbacks in order
+type Callbacks struct {
 	creates    []*func(scope *Scope)
 	updates    []*func(scope *Scope)
 	deletes    []*func(scope *Scope)
 	queries    []*func(scope *Scope)
 	rowQueries []*func(scope *Scope)
-	processors []*callbackProcessor
+	processors []*CallbackProcessor
 }
 
-type callbackProcessor struct {
-	name      string
-	before    string
-	after     string
-	replace   bool
-	remove    bool
-	typ       string
-	processor *func(scope *Scope)
-	callback  *callback
+// callbackProcessor contains all informations for a callback
+type CallbackProcessor struct {
+	name      string              // current callback's name
+	before    string              // register current callback before a callback
+	after     string              // register current callback after a callback
+	replace   bool                // replace callbacks with same name
+	remove    bool                // delete callbacks with same name
+	kind      string              // callback type: create, update, delete, query, row_query
+	processor *func(scope *Scope) // callback handler
+	parent    *Callbacks
 }
 
-func (c *callback) addProcessor(typ string) *callbackProcessor {
-	cp := &callbackProcessor{typ: typ, callback: c}
+func (c *Callbacks) addProcessor(kind string) *CallbackProcessor {
+	cp := &CallbackProcessor{kind: kind, parent: c}
 	c.processors = append(c.processors, cp)
 	return cp
 }
 
-func (c *callback) clone() *callback {
-	return &callback{
+func (c *Callbacks) clone() *Callbacks {
+	return &Callbacks{
 		creates:    c.creates,
 		updates:    c.updates,
 		deletes:    c.deletes,
@@ -40,57 +51,81 @@ func (c *callback) clone() *callback {
 	}
 }
 
-func (c *callback) Create() *callbackProcessor {
+// Create could be used to register callbacks for creating object
+//     db.Callback().Create().After("gorm:create").Register("plugin:run_after_create", func(*Scope) {
+//       // business logic
+//       ...
+//
+//       // set error if some thing wrong happened, will rollback the creating
+//       scope.Err(errors.New("error"))
+//     })
+func (c *Callbacks) Create() *CallbackProcessor {
 	return c.addProcessor("create")
 }
 
-func (c *callback) Update() *callbackProcessor {
+// Update could be used to register callbacks for updating object, refer `Create` for usage
+func (c *Callbacks) Update() *CallbackProcessor {
 	return c.addProcessor("update")
 }
 
-func (c *callback) Delete() *callbackProcessor {
+// Delete could be used to register callbacks for deleting object, refer `Create` for usage
+func (c *Callbacks) Delete() *CallbackProcessor {
 	return c.addProcessor("delete")
 }
 
-func (c *callback) Query() *callbackProcessor {
+// Query could be used to register callbacks for querying objects with query methods like `Find`, `First`, `Related`, `Association`...
+// refer `Create` for usage
+func (c *Callbacks) Query() *CallbackProcessor {
 	return c.addProcessor("query")
 }
 
-func (c *callback) RowQuery() *callbackProcessor {
+// Query could be used to register callbacks for querying objects with `Row`, `Rows`, refer `Create` for usage
+func (c *Callbacks) RowQuery() *CallbackProcessor {
 	return c.addProcessor("row_query")
 }
 
-func (cp *callbackProcessor) Before(name string) *callbackProcessor {
-	cp.before = name
+// After insert a new callback after callback `callbackName`, refer `Callbacks.Create`
+func (cp *CallbackProcessor) After(callbackName string) *CallbackProcessor {
+	cp.after = callbackName
 	return cp
 }
 
-func (cp *callbackProcessor) After(name string) *callbackProcessor {
-	cp.after = name
+// Before insert a new callback before callback `callbackName`, refer `Callbacks.Create`
+func (cp *CallbackProcessor) Before(callbackName string) *CallbackProcessor {
+	cp.before = callbackName
 	return cp
 }
 
-func (cp *callbackProcessor) Register(name string, fc func(scope *Scope)) {
-	cp.name = name
-	cp.processor = &fc
-	cp.callback.sort()
+// Register a new callback, refer `Callbacks.Create`
+func (cp *CallbackProcessor) Register(callbackName string, callback func(scope *Scope)) {
+	cp.name = callbackName
+	cp.processor = &callback
+	cp.parent.reorder()
 }
 
-func (cp *callbackProcessor) Remove(name string) {
-	fmt.Printf("[info] removing callback `%v` from %v\n", name, fileWithLineNum())
-	cp.name = name
+// Remove a registered callback
+//     db.Callback().Create().Remove("gorm:update_time_stamp_when_create")
+func (cp *CallbackProcessor) Remove(callbackName string) {
+	fmt.Printf("[info] removing callback `%v` from %v\n", callbackName, fileWithLineNum())
+	cp.name = callbackName
 	cp.remove = true
-	cp.callback.sort()
+	cp.parent.reorder()
 }
 
-func (cp *callbackProcessor) Replace(name string, fc func(scope *Scope)) {
-	fmt.Printf("[info] replacing callback `%v` from %v\n", name, fileWithLineNum())
-	cp.name = name
-	cp.processor = &fc
+// Replace a registered callback with new callback
+//     db.Callback().Create().Replace("gorm:update_time_stamp_when_create", func(*Scope) {
+//		   scope.SetColumn("Created", now)
+//		   scope.SetColumn("Updated", now)
+//     })
+func (cp *CallbackProcessor) Replace(callbackName string, callback func(scope *Scope)) {
+	fmt.Printf("[info] replacing callback `%v` from %v\n", callbackName, fileWithLineNum())
+	cp.name = callbackName
+	cp.processor = &callback
 	cp.replace = true
-	cp.callback.sort()
+	cp.parent.reorder()
 }
 
+// getRIndex get right index from string slice
 func getRIndex(strs []string, str string) int {
 	for i := len(strs) - 1; i >= 0; i-- {
 		if strs[i] == str {
@@ -100,8 +135,9 @@ func getRIndex(strs []string, str string) int {
 	return -1
 }
 
-func sortProcessors(cps []*callbackProcessor) []*func(scope *Scope) {
-	var sortCallbackProcessor func(c *callbackProcessor)
+// sortProcessors sort callback processors based on its before, after, remove, replace
+func sortProcessors(cps []*CallbackProcessor) []*func(scope *Scope) {
+	var sortCallbackProcessor func(c *CallbackProcessor)
 	var names, sortedNames = []string{}, []string{}
 
 	for _, cp := range cps {
@@ -113,7 +149,7 @@ func sortProcessors(cps []*callbackProcessor) []*func(scope *Scope) {
 		names = append(names, cp.name)
 	}
 
-	sortCallbackProcessor = func(c *callbackProcessor) {
+	sortCallbackProcessor = func(c *CallbackProcessor) {
 		if getRIndex(sortedNames, c.name) > -1 {
 			return
 		}
@@ -172,11 +208,12 @@ func sortProcessors(cps []*callbackProcessor) []*func(scope *Scope) {
 	return append(sortedFuncs, funcs...)
 }
 
-func (c *callback) sort() {
-	var creates, updates, deletes, queries, rowQueries []*callbackProcessor
+// reorder all registered processors, and reset CURD callbacks
+func (c *Callbacks) reorder() {
+	var creates, updates, deletes, queries, rowQueries []*CallbackProcessor
 
 	for _, processor := range c.processors {
-		switch processor.typ {
+		switch processor.kind {
 		case "create":
 			creates = append(creates, processor)
 		case "update":
@@ -196,5 +233,3 @@ func (c *callback) sort() {
 	c.queries = sortProcessors(queries)
 	c.rowQueries = sortProcessors(rowQueries)
 }
-
-var DefaultCallback = &callback{processors: []*callbackProcessor{}}

callback_create.go

@@ -114,13 +114,13 @@ func AfterCreate(scope *Scope) {
 }
 
 func init() {
-	DefaultCallback.Create().Register("gorm:begin_transaction", BeginTransaction)
-	DefaultCallback.Create().Register("gorm:before_create", BeforeCreate)
-	DefaultCallback.Create().Register("gorm:save_before_associations", SaveBeforeAssociations)
-	DefaultCallback.Create().Register("gorm:update_time_stamp_when_create", UpdateTimeStampWhenCreate)
-	DefaultCallback.Create().Register("gorm:create", Create)
-	DefaultCallback.Create().Register("gorm:force_reload_after_create", ForceReloadAfterCreate)
-	DefaultCallback.Create().Register("gorm:save_after_associations", SaveAfterAssociations)
-	DefaultCallback.Create().Register("gorm:after_create", AfterCreate)
-	DefaultCallback.Create().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
+	defaultCallbacks.Create().Register("gorm:begin_transaction", BeginTransaction)
+	defaultCallbacks.Create().Register("gorm:before_create", BeforeCreate)
+	defaultCallbacks.Create().Register("gorm:save_before_associations", SaveBeforeAssociations)
+	defaultCallbacks.Create().Register("gorm:update_time_stamp_when_create", UpdateTimeStampWhenCreate)
+	defaultCallbacks.Create().Register("gorm:create", Create)
+	defaultCallbacks.Create().Register("gorm:force_reload_after_create", ForceReloadAfterCreate)
+	defaultCallbacks.Create().Register("gorm:save_after_associations", SaveAfterAssociations)
+	defaultCallbacks.Create().Register("gorm:after_create", AfterCreate)
+	defaultCallbacks.Create().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
 }

callback_delete.go

@@ -28,9 +28,9 @@ func AfterDelete(scope *Scope) {
 }
 
 func init() {
-	DefaultCallback.Delete().Register("gorm:begin_transaction", BeginTransaction)
-	DefaultCallback.Delete().Register("gorm:before_delete", BeforeDelete)
-	DefaultCallback.Delete().Register("gorm:delete", Delete)
-	DefaultCallback.Delete().Register("gorm:after_delete", AfterDelete)
-	DefaultCallback.Delete().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
+	defaultCallbacks.Delete().Register("gorm:begin_transaction", BeginTransaction)
+	defaultCallbacks.Delete().Register("gorm:before_delete", BeforeDelete)
+	defaultCallbacks.Delete().Register("gorm:delete", Delete)
+	defaultCallbacks.Delete().Register("gorm:after_delete", AfterDelete)
+	defaultCallbacks.Delete().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
 }

callback_query.go

@@ -83,7 +83,7 @@ func AfterQuery(scope *Scope) {
 }
 
 func init() {
-	DefaultCallback.Query().Register("gorm:query", Query)
-	DefaultCallback.Query().Register("gorm:after_query", AfterQuery)
-	DefaultCallback.Query().Register("gorm:preload", Preload)
+	defaultCallbacks.Query().Register("gorm:query", Query)
+	defaultCallbacks.Query().Register("gorm:after_query", AfterQuery)
+	defaultCallbacks.Query().Register("gorm:preload", Preload)
 }

callback_test.go

@@ -23,62 +23,62 @@ func afterCreate1(s *Scope)  {}
 func afterCreate2(s *Scope)  {}
 
 func TestRegisterCallback(t *testing.T) {
-	var callback = &callback{processors: []*callbackProcessor{}}
+	var callbacks = &Callbacks{}
 
-	callback.Create().Register("before_create1", beforeCreate1)
-	callback.Create().Register("before_create2", beforeCreate2)
-	callback.Create().Register("create", create)
-	callback.Create().Register("after_create1", afterCreate1)
-	callback.Create().Register("after_create2", afterCreate2)
+	callbacks.Create().Register("before_create1", beforeCreate1)
+	callbacks.Create().Register("before_create2", beforeCreate2)
+	callbacks.Create().Register("create", create)
+	callbacks.Create().Register("after_create1", afterCreate1)
+	callbacks.Create().Register("after_create2", afterCreate2)
 
-	if !equalFuncs(callback.creates, []string{"beforeCreate1", "beforeCreate2", "create", "afterCreate1", "afterCreate2"}) {
+	if !equalFuncs(callbacks.creates, []string{"beforeCreate1", "beforeCreate2", "create", "afterCreate1", "afterCreate2"}) {
 		t.Errorf("register callback")
 	}
 }
 
 func TestRegisterCallbackWithOrder(t *testing.T) {
-	var callback1 = &callback{processors: []*callbackProcessor{}}
-	callback1.Create().Register("before_create1", beforeCreate1)
-	callback1.Create().Register("create", create)
-	callback1.Create().Register("after_create1", afterCreate1)
-	callback1.Create().Before("after_create1").Register("after_create2", afterCreate2)
-	if !equalFuncs(callback1.creates, []string{"beforeCreate1", "create", "afterCreate2", "afterCreate1"}) {
+	var callbacks1 = &Callbacks{}
+	callbacks1.Create().Register("before_create1", beforeCreate1)
+	callbacks1.Create().Register("create", create)
+	callbacks1.Create().Register("after_create1", afterCreate1)
+	callbacks1.Create().Before("after_create1").Register("after_create2", afterCreate2)
+	if !equalFuncs(callbacks1.creates, []string{"beforeCreate1", "create", "afterCreate2", "afterCreate1"}) {
 		t.Errorf("register callback with order")
 	}
 
-	var callback2 = &callback{processors: []*callbackProcessor{}}
+	var callbacks2 = &Callbacks{}
 
-	callback2.Update().Register("create", create)
-	callback2.Update().Before("create").Register("before_create1", beforeCreate1)
-	callback2.Update().After("after_create2").Register("after_create1", afterCreate1)
-	callback2.Update().Before("before_create1").Register("before_create2", beforeCreate2)
-	callback2.Update().Register("after_create2", afterCreate2)
+	callbacks2.Update().Register("create", create)
+	callbacks2.Update().Before("create").Register("before_create1", beforeCreate1)
+	callbacks2.Update().After("after_create2").Register("after_create1", afterCreate1)
+	callbacks2.Update().Before("before_create1").Register("before_create2", beforeCreate2)
+	callbacks2.Update().Register("after_create2", afterCreate2)
 
-	if !equalFuncs(callback2.updates, []string{"beforeCreate2", "beforeCreate1", "create", "afterCreate2", "afterCreate1"}) {
+	if !equalFuncs(callbacks2.updates, []string{"beforeCreate2", "beforeCreate1", "create", "afterCreate2", "afterCreate1"}) {
 		t.Errorf("register callback with order")
 	}
 }
 
 func TestRegisterCallbackWithComplexOrder(t *testing.T) {
-	var callback1 = &callback{processors: []*callbackProcessor{}}
+	var callbacks1 = &Callbacks{}
 
-	callback1.Query().Before("after_create1").After("before_create1").Register("create", create)
-	callback1.Query().Register("before_create1", beforeCreate1)
-	callback1.Query().Register("after_create1", afterCreate1)
+	callbacks1.Query().Before("after_create1").After("before_create1").Register("create", create)
+	callbacks1.Query().Register("before_create1", beforeCreate1)
+	callbacks1.Query().Register("after_create1", afterCreate1)
 
-	if !equalFuncs(callback1.queries, []string{"beforeCreate1", "create", "afterCreate1"}) {
+	if !equalFuncs(callbacks1.queries, []string{"beforeCreate1", "create", "afterCreate1"}) {
 		t.Errorf("register callback with order")
 	}
 
-	var callback2 = &callback{processors: []*callbackProcessor{}}
+	var callbacks2 = &Callbacks{}
 
-	callback2.Delete().Before("after_create1").After("before_create1").Register("create", create)
-	callback2.Delete().Before("create").Register("before_create1", beforeCreate1)
-	callback2.Delete().After("before_create1").Register("before_create2", beforeCreate2)
-	callback2.Delete().Register("after_create1", afterCreate1)
-	callback2.Delete().After("after_create1").Register("after_create2", afterCreate2)
+	callbacks2.Delete().Before("after_create1").After("before_create1").Register("create", create)
+	callbacks2.Delete().Before("create").Register("before_create1", beforeCreate1)
+	callbacks2.Delete().After("before_create1").Register("before_create2", beforeCreate2)
+	callbacks2.Delete().Register("after_create1", afterCreate1)
+	callbacks2.Delete().After("after_create1").Register("after_create2", afterCreate2)
 
-	if !equalFuncs(callback2.deletes, []string{"beforeCreate1", "beforeCreate2", "create", "afterCreate1", "afterCreate2"}) {
+	if !equalFuncs(callbacks2.deletes, []string{"beforeCreate1", "beforeCreate2", "create", "afterCreate1", "afterCreate2"}) {
 		t.Errorf("register callback with order")
 	}
 }
@@ -86,27 +86,27 @@ func TestRegisterCallbackWithComplexOrder(t *testing.T) {
 func replaceCreate(s *Scope) {}
 
 func TestReplaceCallback(t *testing.T) {
-	var callback = &callback{processors: []*callbackProcessor{}}
+	var callbacks = &Callbacks{}
 
-	callback.Create().Before("after_create1").After("before_create1").Register("create", create)
-	callback.Create().Register("before_create1", beforeCreate1)
-	callback.Create().Register("after_create1", afterCreate1)
-	callback.Create().Replace("create", replaceCreate)
+	callbacks.Create().Before("after_create1").After("before_create1").Register("create", create)
+	callbacks.Create().Register("before_create1", beforeCreate1)
+	callbacks.Create().Register("after_create1", afterCreate1)
+	callbacks.Create().Replace("create", replaceCreate)
 
-	if !equalFuncs(callback.creates, []string{"beforeCreate1", "replaceCreate", "afterCreate1"}) {
+	if !equalFuncs(callbacks.creates, []string{"beforeCreate1", "replaceCreate", "afterCreate1"}) {
 		t.Errorf("replace callback")
 	}
 }
 
 func TestRemoveCallback(t *testing.T) {
-	var callback = &callback{processors: []*callbackProcessor{}}
+	var callbacks = &Callbacks{}
 
-	callback.Create().Before("after_create1").After("before_create1").Register("create", create)
-	callback.Create().Register("before_create1", beforeCreate1)
-	callback.Create().Register("after_create1", afterCreate1)
-	callback.Create().Remove("create")
+	callbacks.Create().Before("after_create1").After("before_create1").Register("create", create)
+	callbacks.Create().Register("before_create1", beforeCreate1)
+	callbacks.Create().Register("after_create1", afterCreate1)
+	callbacks.Create().Remove("create")
 
-	if !equalFuncs(callback.creates, []string{"beforeCreate1", "afterCreate1"}) {
+	if !equalFuncs(callbacks.creates, []string{"beforeCreate1", "afterCreate1"}) {
 		t.Errorf("remove callback")
 	}
 }

callback_update.go

@@ -83,13 +83,13 @@ func AfterUpdate(scope *Scope) {
 }
 
 func init() {
-	DefaultCallback.Update().Register("gorm:assign_update_attributes", AssignUpdateAttributes)
-	DefaultCallback.Update().Register("gorm:begin_transaction", BeginTransaction)
-	DefaultCallback.Update().Register("gorm:before_update", BeforeUpdate)
-	DefaultCallback.Update().Register("gorm:save_before_associations", SaveBeforeAssociations)
-	DefaultCallback.Update().Register("gorm:update_time_stamp_when_update", UpdateTimeStampWhenUpdate)
-	DefaultCallback.Update().Register("gorm:update", Update)
-	DefaultCallback.Update().Register("gorm:save_after_associations", SaveAfterAssociations)
-	DefaultCallback.Update().Register("gorm:after_update", AfterUpdate)
-	DefaultCallback.Update().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
+	defaultCallbacks.Update().Register("gorm:assign_update_attributes", AssignUpdateAttributes)
+	defaultCallbacks.Update().Register("gorm:begin_transaction", BeginTransaction)
+	defaultCallbacks.Update().Register("gorm:before_update", BeforeUpdate)
+	defaultCallbacks.Update().Register("gorm:save_before_associations", SaveBeforeAssociations)
+	defaultCallbacks.Update().Register("gorm:update_time_stamp_when_update", UpdateTimeStampWhenUpdate)
+	defaultCallbacks.Update().Register("gorm:update", Update)
+	defaultCallbacks.Update().Register("gorm:save_after_associations", SaveAfterAssociations)
+	defaultCallbacks.Update().Register("gorm:after_update", AfterUpdate)
+	defaultCallbacks.Update().Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
 }

main.go

@@ -23,7 +23,7 @@ type DB struct {
 	Value             interface{}
 	Error             error
 	RowsAffected      int64
-	callback          *callback
+	callbacks         *Callbacks
 	db                sqlCommon
 	parent            *DB
 	search            *search
@@ -67,7 +67,7 @@ func Open(dialect string, args ...interface{}) (*DB, error) {
 		db = DB{
 			dialect:   NewDialect(dialect),
 			logger:    defaultLogger,
-			callback: DefaultCallback,
+			callbacks: defaultCallbacks,
 			source:    source,
 			values:    map[string]interface{}{},
 			db:        dbSql,
@@ -111,9 +111,9 @@ func (s *DB) CommonDB() sqlCommon {
 	return s.db
 }
 
-func (s *DB) Callback() *callback {
-	s.parent.callback = s.parent.callback.clone()
-	return s.parent.callback
+func (s *DB) Callback() *Callbacks {
+	s.parent.callbacks = s.parent.callbacks.clone()
+	return s.parent.callbacks
 }
 
 func (s *DB) SetLogger(l logger) {
@@ -201,22 +201,22 @@ func (s *DB) First(out interface{}, where ...interface{}) *DB {
 	newScope := s.clone().NewScope(out)
 	newScope.Search.Limit(1)
 	return newScope.Set("gorm:order_by_primary_key", "ASC").
-		inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
+		inlineCondition(where...).callCallbacks(s.parent.callbacks.queries).db
 }
 
 func (s *DB) Last(out interface{}, where ...interface{}) *DB {
 	newScope := s.clone().NewScope(out)
 	newScope.Search.Limit(1)
 	return newScope.Set("gorm:order_by_primary_key", "DESC").
-		inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
+		inlineCondition(where...).callCallbacks(s.parent.callbacks.queries).db
 }
 
 func (s *DB) Find(out interface{}, where ...interface{}) *DB {
-	return s.clone().NewScope(out).inlineCondition(where...).callCallbacks(s.parent.callback.queries).db
+	return s.clone().NewScope(out).inlineCondition(where...).callCallbacks(s.parent.callbacks.queries).db
 }
 
 func (s *DB) Scan(dest interface{}) *DB {
-	return s.clone().NewScope(s.Value).Set("gorm:query_destination", dest).callCallbacks(s.parent.callback.queries).db
+	return s.clone().NewScope(s.Value).Set("gorm:query_destination", dest).callCallbacks(s.parent.callbacks.queries).db
 }
 
 func (s *DB) Row() *sql.Row {
@@ -258,9 +258,9 @@ func (s *DB) FirstOrCreate(out interface{}, where ...interface{}) *DB {
 		if !result.RecordNotFound() {
 			return result
 		}
-		c.AddError(c.NewScope(out).inlineCondition(where...).initialize().callCallbacks(c.parent.callback.creates).db.Error)
+		c.AddError(c.NewScope(out).inlineCondition(where...).initialize().callCallbacks(c.parent.callbacks.creates).db.Error)
 	} else if len(c.search.assignAttrs) > 0 {
-		c.AddError(c.NewScope(out).InstanceSet("gorm:update_interface", c.search.assignAttrs).callCallbacks(c.parent.callback.updates).db.Error)
+		c.AddError(c.NewScope(out).InstanceSet("gorm:update_interface", c.search.assignAttrs).callCallbacks(c.parent.callbacks.updates).db.Error)
 	}
 	return c
 }
@@ -273,7 +273,7 @@ func (s *DB) Updates(values interface{}, ignoreProtectedAttrs ...bool) *DB {
 	return s.clone().NewScope(s.Value).
 		Set("gorm:ignore_protected_attrs", len(ignoreProtectedAttrs) > 0).
 		InstanceSet("gorm:update_interface", values).
-		callCallbacks(s.parent.callback.updates).db
+		callCallbacks(s.parent.callbacks.updates).db
 }
 
 func (s *DB) UpdateColumn(attrs ...interface{}) *DB {
@@ -285,24 +285,24 @@ func (s *DB) UpdateColumns(values interface{}) *DB {
 		Set("gorm:update_column", true).
 		Set("gorm:save_associations", false).
 		InstanceSet("gorm:update_interface", values).
-		callCallbacks(s.parent.callback.updates).db
+		callCallbacks(s.parent.callbacks.updates).db
 }
 
 func (s *DB) Save(value interface{}) *DB {
 	scope := s.clone().NewScope(value)
 	if scope.PrimaryKeyZero() {
-		return scope.callCallbacks(s.parent.callback.creates).db
+		return scope.callCallbacks(s.parent.callbacks.creates).db
 	}
-	return scope.callCallbacks(s.parent.callback.updates).db
+	return scope.callCallbacks(s.parent.callbacks.updates).db
 }
 
 func (s *DB) Create(value interface{}) *DB {
 	scope := s.clone().NewScope(value)
-	return scope.callCallbacks(s.parent.callback.creates).db
+	return scope.callCallbacks(s.parent.callbacks.creates).db
 }
 
 func (s *DB) Delete(value interface{}, where ...interface{}) *DB {
-	return s.clone().NewScope(value).inlineCondition(where...).callCallbacks(s.parent.callback.deletes).db
+	return s.clone().NewScope(value).inlineCondition(where...).callCallbacks(s.parent.callbacks.deletes).db
 }
 
 func (s *DB) Raw(sql string, values ...interface{}) *DB {

scope_private.go

@@ -377,14 +377,14 @@ func (scope *Scope) updatedAttrsWithValues(values map[string]interface{}, ignore
 
 func (scope *Scope) row() *sql.Row {
 	defer scope.trace(NowFunc())
-	scope.callCallbacks(scope.db.parent.callback.rowQueries)
+	scope.callCallbacks(scope.db.parent.callbacks.rowQueries)
 	scope.prepareQuerySql()
 	return scope.SqlDB().QueryRow(scope.Sql, scope.SqlVars...)
 }
 
 func (scope *Scope) rows() (*sql.Rows, error) {
 	defer scope.trace(NowFunc())
-	scope.callCallbacks(scope.db.parent.callback.rowQueries)
+	scope.callCallbacks(scope.db.parent.callbacks.rowQueries)
 	scope.prepareQuerySql()
 	return scope.SqlDB().Query(scope.Sql, scope.SqlVars...)
 }