allow inserting maps as well as structs

db.go

@@ -324,7 +324,7 @@ func (db *DB) Update(tableName string, fields map[string]any, whereField string,
 	})
 }
 
-// Insert inserts a struct into the database
+// Insert inserts a struct or map into the database
 func (db *DB) Insert(tableName string, obj any, excludeFields ...string) (int64, error) {
 	conn, err := db.pool.Take(context.Background())
 	if err != nil {
@@ -332,12 +332,6 @@ func (db *DB) Insert(tableName string, obj any, excludeFields ...string) (int64,
 	}
 	defer db.pool.Put(conn)
 
-	v := reflect.ValueOf(obj)
-	if v.Kind() == reflect.Pointer {
-		v = v.Elem()
-	}
-	t := v.Type()
-
 	exclude := make(map[string]bool)
 	for _, field := range excludeFields {
 		exclude[toSnakeCase(field)] = true
@@ -347,18 +341,43 @@ func (db *DB) Insert(tableName string, obj any, excludeFields ...string) (int64,
 	var placeholders []string
 	var args []any
 
+	v := reflect.ValueOf(obj)
+	if v.Kind() == reflect.Pointer {
+		v = v.Elem()
+	}
+
+	switch v.Kind() {
+	case reflect.Map:
+		// Handle map[string]any
+		m := obj.(map[string]any)
+		for key, value := range m {
+			columnName := toSnakeCase(key)
+			if exclude[columnName] {
+				continue
+			}
+			columns = append(columns, columnName)
+			placeholders = append(placeholders, "?")
+			args = append(args, value)
+		}
+
+	case reflect.Struct:
+		// Handle struct
+		t := v.Type()
 		for i := 0; i < t.NumField(); i++ {
 			field := t.Field(i)
 			columnName := toSnakeCase(field.Name)
 			if exclude[columnName] {
 				continue
 			}
-
 			columns = append(columns, columnName)
 			placeholders = append(placeholders, "?")
 			args = append(args, v.Field(i).Interface())
 		}
 
+	default:
+		return 0, fmt.Errorf("obj must be a struct, pointer to struct, or map[string]any")
+	}
+
 	query := fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)",
 		tableName, strings.Join(columns, ", "), strings.Join(placeholders, ", "))