Views grouping is not working

Problem/Motivation

Grouping enabled in views settings, but it is not working.

Proposed resolution

Most probably there is problem in view's render(). What we can do is - do not override the inherited render(). If we do this, we have to create a new view's theme that uses the default theme_listjs().

Remaining tasks

Fix the problem.

User interface changes

N/A

API changes

New views theme will be introduced, and it will use the default theme_listjs().

Data model changes

N/A