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package gorm
import (
"reflect"
"strings"
)
func beginTransactionCallback(scope *Scope) {
scope.Begin()
}
func commitOrRollbackTransactionCallback(scope *Scope) {
scope.CommitOrRollback()
}
func saveAssociationCheck(scope *Scope, field *Field) (autoUpdate bool, autoCreate bool, saveReference bool, r *Relationship) {
checkTruth := func(value interface{}) bool {
if v, ok := value.(bool); ok && !v {
return false
}
if v, ok := value.(string); ok {
v = strings.ToLower(v)
return v == "true"
}
return true
}
if scope.changeableField(field) && !field.IsBlank && !field.IsIgnored {
if r = field.Relationship; r != nil {
autoUpdate, autoCreate, saveReference = true, true, true
if value, ok := scope.Get("gorm:save_associations"); ok {
autoUpdate = checkTruth(value)
autoCreate = autoUpdate
saveReference = autoUpdate
} else if value, ok := field.TagSettingsGet("SAVE_ASSOCIATIONS"); ok {
autoUpdate = checkTruth(value)
autoCreate = autoUpdate
saveReference = autoUpdate
}
if value, ok := scope.Get("gorm:association_autoupdate"); ok {
autoUpdate = checkTruth(value)
} else if value, ok := field.TagSettingsGet("ASSOCIATION_AUTOUPDATE"); ok {
autoUpdate = checkTruth(value)
}
if value, ok := scope.Get("gorm:association_autocreate"); ok {
autoCreate = checkTruth(value)
} else if value, ok := field.TagSettingsGet("ASSOCIATION_AUTOCREATE"); ok {
autoCreate = checkTruth(value)
}
if value, ok := scope.Get("gorm:association_save_reference"); ok {
saveReference = checkTruth(value)
} else if value, ok := field.TagSettingsGet("ASSOCIATION_SAVE_REFERENCE"); ok {
saveReference = checkTruth(value)
}
}
}
return
}
func saveBeforeAssociationsCallback(scope *Scope) {
for _, field := range scope.Fields() {
autoUpdate, autoCreate, saveReference, relationship := saveAssociationCheck(scope, field)
if relationship != nil && relationship.Kind == "belongs_to" {
fieldValue := field.Field.Addr().Interface()
newScope := scope.New(fieldValue)
if newScope.PrimaryKeyZero() {
if autoCreate {
scope.Err(scope.NewDB().Save(fieldValue).Error)
}
} else if autoUpdate {
scope.Err(scope.NewDB().Save(fieldValue).Error)
}
if saveReference {
if len(relationship.ForeignFieldNames) != 0 {
// set value's foreign key
for idx, fieldName := range relationship.ForeignFieldNames {
associationForeignName := relationship.AssociationForeignDBNames[idx]
if foreignField, ok := scope.New(fieldValue).FieldByName(associationForeignName); ok {
scope.Err(scope.SetColumn(fieldName, foreignField.Field.Interface()))
}
}
}
}
}
}
}
func saveAfterAssociationsCallback(scope *Scope) {
for _, field := range scope.Fields() {
autoUpdate, autoCreate, saveReference, relationship := saveAssociationCheck(scope, field)
if relationship != nil && (relationship.Kind == "has_one" || relationship.Kind == "has_many" || relationship.Kind == "many_to_many") {
value := field.Field
switch value.Kind() {
case reflect.Slice:
for i := 0; i < value.Len(); i++ {
newDB := scope.NewDB()
elem := value.Index(i).Addr().Interface()
newScope := newDB.NewScope(elem)
if saveReference {
if relationship.JoinTableHandler == nil && len(relationship.ForeignFieldNames) != 0 {
for idx, fieldName := range relationship.ForeignFieldNames {
associationForeignName := relationship.AssociationForeignDBNames[idx]
if f, ok := scope.FieldByName(associationForeignName); ok {
scope.Err(newScope.SetColumn(fieldName, f.Field.Interface()))
}
}
}
if relationship.PolymorphicType != "" {
scope.Err(newScope.SetColumn(relationship.PolymorphicType, relationship.PolymorphicValue))
}
}
if newScope.PrimaryKeyZero() {
if autoCreate {
scope.Err(newDB.Save(elem).Error)
}
} else if autoUpdate {
scope.Err(newDB.Save(elem).Error)
}
if !scope.New(newScope.Value).PrimaryKeyZero() && saveReference {
if joinTableHandler := relationship.JoinTableHandler; joinTableHandler != nil {
scope.Err(joinTableHandler.Add(joinTableHandler, newDB, scope.Value, newScope.Value))
}
}
}
default:
elem := value.Addr().Interface()
newScope := scope.New(elem)
if saveReference {
if len(relationship.ForeignFieldNames) != 0 {
for idx, fieldName := range relationship.ForeignFieldNames {
associationForeignName := relationship.AssociationForeignDBNames[idx]
if f, ok := scope.FieldByName(associationForeignName); ok {
scope.Err(newScope.SetColumn(fieldName, f.Field.Interface()))
}
}
}
if relationship.PolymorphicType != "" {
scope.Err(newScope.SetColumn(relationship.PolymorphicType, relationship.PolymorphicValue))
}
}
if newScope.PrimaryKeyZero() {
if autoCreate {
scope.Err(scope.NewDB().Save(elem).Error)
}
} else if autoUpdate {
scope.Err(scope.NewDB().Save(elem).Error)
}
}
}
}
}