orm: handle inserting enum fields (#26680)

* Handle inserting enum fields in ORM

* Implement enum retrieval from db

Author: squidink7

vlib/orm/orm_func.v

@@ -524,7 +524,7 @@ fn (qb &QueryBuilder[T]) map_row(row []Primitive) !T {
 							f64 { int(value) }
 							else { 0 }
 						}
-					} $else $if field.typ is i64 || field.typ is ?i64 {
+					} $else $if field.typ is i64 || field.typ is ?i64 || field.is_enum {
 						instance.$(field.name) = match value {
 							i8 { i64(value) }
 							i16 { i64(value) }
@@ -847,6 +847,8 @@ fn fill_data_with_struct[T](value T, meta []TableField) QueryData {
 				} else {
 					qb.data << option_time_to_primitive(value.$(field.name))
 				}
+			} $else $if field.is_enum {
+				qb.data << i64_to_primitive(i64(value.$(field.name)))
 			}
 		}
 	}

vlib/orm/orm_func_test.v

@@ -11,6 +11,7 @@ struct User {
 	age           int
 	role          string @[index]
 	status        int    @[index]
+	level         UserLevel
 	salary        int
 	title         string
 	score         int
@@ -42,6 +43,12 @@ struct User {
 	option_string ?string
 }
 
+enum UserLevel {
+	beginner
+	intermediate
+	advanced
+}
+
 // UserPart is part of User, so we can access only part of the `sys_users` table
 // note: for test, we modify `created_at` field from option to require
 // a `null` value in database, will map to default value of the require field in struct
@@ -258,6 +265,7 @@ fn test_orm_func_stmts() {
 			age:         27
 			role:        'employer'
 			status:      5
+			level:       .intermediate
 			salary:      2500
 			title:       'doctor'
 			score:       81
@@ -524,6 +532,8 @@ fn test_orm_func_stmts() {
 	selected_users := qb.where('created_at IS NULL && ((salary > ? && age < ?) || (role LIKE ?))',
 		2000, 30, '%employee%')!.query()!
 	assert selected_users[0].name == 'Silly'
+	// Check enum
+	assert selected_users[0].level == .intermediate
 	assert selected_users.len == 1
 
 	// complex select with lowercase `is null` and `like`