code: public function orWhere($condition)
      {
          if ($this->where === null) {
              $this->where = $condition;
          } else {
              $this->where = ['or', $this->where, $condition];
          }
  
          return $this;
      }
docs: Adds an additional WHERE condition to the existing one.
  The new condition and the existing one will be joined using the 'OR' operator.
  @param string|array|ExpressionInterface $condition the new WHERE condition. Please refer to [[where()]]
  on how to specify this parameter.
  @return $this the query object itself
  @see where()
  @see andWhere()