Function saveAssociations

callbacks/associations.go:378–432

(db *gorm.DB, rel *schema.Relationship, rValues reflect.Value, selectColumns map[string]bool, restricted bool, defaultUpdatingColumns []string)

}

func saveAssociations(db *gorm.DB, rel *schema.Relationship, rValues reflect.Value, selectColumns map[string]bool, restricted bool, defaultUpdatingColumns []string) error {
	// stop save association loop
	if checkAssociationsSaved(db, rValues) {
		return nil
	}

	var (
		selects, omits []string
		onConflict     = onConflictOption(db.Statement, rel.FieldSchema, defaultUpdatingColumns)
		refName        = rel.Name + "."
		values         = rValues.Interface()
	)

	for name, ok := range selectColumns {
		columnName := ""
		if strings.HasPrefix(name, refName) {
			columnName = strings.TrimPrefix(name, refName)
		}

		if columnName != "" {
			if ok {
				selects = append(selects, columnName)
			} else {
				omits = append(omits, columnName)
			}
		}
	}

	tx := db.Session(&gorm.Session{NewDB: true}).Clauses(onConflict).Session(&gorm.Session{
		FullSaveAssociations:     db.FullSaveAssociations,
		SkipHooks:                db.Statement.SkipHooks,
		DisableNestedTransaction: true,
	})

	db.Statement.Settings.Range(func(k, v interface{}) bool {
		tx.Statement.Settings.Store(k, v)
		return true
	})

	if tx.Statement.FullSaveAssociations {
		tx = tx.Set("gorm:update_track_time", true)
	}

	if len(selects) > 0 {
		tx = tx.Select(selects)
	} else if restricted && len(omits) == 0 {
		tx = tx.Omit(clause.Associations)
	}

	if len(omits) > 0 {
		tx = tx.Omit(omits...)
	}

	return db.AddError(tx.Create(values).Error)
}

// check association values has been saved
// if values kind is Struct, check it has been saved