def add_price_entity(self, price: dal.Price):
        """ Adds the price """
        from decimal import Decimal

        # check if the price already exists in db.
        repo = self.get_price_repository()
        existing = (
            repo.query
            .filter(dal.Price.namespace == price.namespace)
            .filter(dal.Price.symbol == price.symbol)
            .filter(dal.Price.date == price.date)
            .filter(dal.Price.time == price.time)
            .first()
        )
        if existing:
            # Update existing price.
            new_value = Decimal(price.value) / Decimal(price.denom)
            self.logger.info(f"Exists: {price}")
            if price.currency != existing.currency:
                raise ValueError(
                    f"The currency is different for price {price}!")
            if existing.value != price.value:
                existing.value = price.value
                self.logger.info(f"Updating to {new_value}.")
            if existing.denom != price.denom:
                existing.denom = price.denom
        else:
            # Insert new price
            self.session.add(price)
            self.logger.info(f"Added {price}")
Adds the price