fix delete function

dbHandler.go

@@ -1,4 +1,4 @@
-package AccessHandler
+package dbHandler
 
 import (
 	"errors"
@@ -218,33 +218,23 @@ func (dH *DBHandler) UpdateValuesByKey(model any, key string, value any) error {
 	return dH.db.Model(lookUpModel).Updates(model).Error
 }
 
-// deleteById
-//
-// Description:
-//
-//	Deletes records by their ID(s).
-//
-// Behavior:
-//   - If the first ID == 0, all records in the table are deleted.
-//   - Otherwise, deletes the provided IDs.
-//
-// Parameters:
-//   - model: Model struct type representing the table.
-//   - id:    Variadic list of IDs to delete.
-//
-// Returns:
-//   - error: Any deletion error.
-func (dH *DBHandler) DeleteById(model any, id ...uint) error {
-	if id[0] == 0 {
-		dH.logger.Debug("deleteById", "delete all")
-		return dH.db.Where("1 = 1").Delete(model).Error
+func (dH *DBHandler) DeleteById(model any, ids ...uint) error {
+	if len(ids) == 0 {
+		return fmt.Errorf("no IDs provided")
 	}
 
-	dH.logger.Debug("deleteById", "delete ids"+fmt.Sprint(id))
-	if err := dH.Exists(model, "id", id, false); err != nil {
-		return err
+	if len(ids) == 1 && ids[0] == 0 {
+		dH.logger.Debug("deleteById", "delete ALL records!")
+		return dH.db.Session(&gorm.Session{AllowGlobalUpdate: true}).
+			Delete(model).Error
 	}
-	return dH.db.Delete(model, id).Error
+
+	dH.logger.Debug("deleteById", "delete ids "+fmt.Sprint(ids))
+
+	if err := dH.db.Delete(model, ids).Error; err != nil {
+		return fmt.Errorf("delete failed: %w", err)
+	}
+	return nil
 }
 
 // deleteByKey
@@ -275,39 +265,40 @@ func (dH *DBHandler) DeleteByKey(model any, key string, value any, LikeSearch bo
 	return dH.db.Where(key+" = ?", value).Delete(model).Error
 }
 
-// exists
-//
-// Description:
-//
-//	Checks whether a record exists matching the specified key/value filter.
-//
-// Behavior:
-//   - Performs a `First` query on the database.
-//   - If `LikeSearch` is true, performs a LIKE query.
-//   - Returns an error if the record does not exist or query fails.
-//
-// Parameters:
-//   - model:      Model struct type to search.
-//   - key:        Column name to filter by.
-//   - value:      Value to match.
-//   - LikeSearch: Whether to use wildcard search.
-//
-// Returns:
-//   - error: “no record found” or DB error.
-func (dH *DBHandler) Exists(model any, key string, value any, LikeSearch bool) (err error) {
-	if LikeSearch {
-		value = strings.ReplaceAll(fmt.Sprint(value), "*", "%")
-		key = key + " LIKE ?"
-	} else {
-		key = key + " = ?"
+func (dH *DBHandler) Exists(model any, key string, value any, likeSearch bool) (found bool) {
+	var query string
+	var args any
+
+	// Detect LIKE and IN behavior
+	val := reflect.ValueOf(value)
+	isSlice := val.Kind() == reflect.Slice
+
+	switch {
+	case isSlice:
+		if val.Len() == 0 {
+			dH.logger.Error("Exists", fmt.Sprintf("empty slice for %s", key))
+			return false
+		}
+		query = fmt.Sprintf("%s IN ?", key)
+		args = value
+
+	case likeSearch:
+		str := strings.ReplaceAll(fmt.Sprint(value), "*", "%")
+		query = fmt.Sprintf("%s LIKE ?", key)
+		args = str
+
+	default:
+		query = fmt.Sprintf("%s = ?", key)
+		args = value
 	}
 
-	dH.logger.Debug("exists", "check if exists key "+key+" value "+fmt.Sprint(value))
-	err = dH.db.Where(key, value).First(model).Error
-	if errors.Is(err, gorm.ErrRecordNotFound) {
-		return fmt.Errorf("no record found for %s %v", key[:len(key)-1], value)
-	} else if err != nil {
-		return fmt.Errorf("query failed: %w", err)
+	dH.logger.Debug("exists", "checking existence for key "+query+" value "+fmt.Sprint(args))
+
+	tx := dH.db.Where(query, args).Find(model)
+
+	if tx.Error != nil {
+		dH.logger.Error("Exists", fmt.Sprintf("query failed: %v", tx.Error))
+		return false
 	}
-	return
+	return tx.RowsAffected > 0
 }