admin: New button to delete tries for a flag

libfic/flag_key.go

@@ -255,6 +255,29 @@ func (k *FlagKey) TeamsOnIt() ([]int64, error) {
 	}
 }
 
+func (k *FlagKey) DeleteTries() error {
+	if rows, err := DBQuery("SELECT id_try FROM exercice_tries_flags WHERE id_flag = ?", k.Id); err != nil {
+		return err
+	} else {
+		defer rows.Close()
+
+		for rows.Next() {
+			var idtry int64
+			err = rows.Scan(&idtry)
+			if err != nil {
+				return err
+			}
+
+			_, err = DBExec("DELETE FROM exercice_tries WHERE id_try = ?", idtry)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	}
+}
+
 // AddFlagKey creates and fills a new struct Flag, from a hashed flag, and registers it into the database.
 func (k *FlagKey) Create(e *Exercice) (Flag, error) {
 	// Check the regexp compile