by the other.

This view is the jurisprudential position of Imām Mālik, one of the reported opinions from Imām Aḥmad, and the earlier opinion of al-Shāfiʿī. It was also selected by al-Muwaffaq Ibn Qudāmah, the author of al-Sharḥ al-Kabīr, and by Shaykh al-Islām Ibn Taymiyyah.

Al-Mughnī states: In summary, the rulings fall under three categories:

1 – Whenever measurement—whether by volume or by weight—coincides with edibility within the same genus, ribā applies to it according to a single narration, as in the case of rice or oils. This is the position of the scholars of all the major centers, past and present.

2 – Whatever lacks both measurement (by volume or weight) and edibility, and is of a different genus, is free of ribā, also according to a single narration; this is the view of most scholars, such as straw or date pits.

3 – With items that have only edibility, or only measurement by volume or weight within one genus, there are two narrations:
The first says it is permissible, God willing, for there is no reliable proof for prohibiting it. End of quote.

The sounder position is what has already been stated: ribā exists only where edibility and measurement by volume or weight meet. If one or both of these two conditions is missing, there is no ribā. Allah knows best.