Searching for historical assignments

Community Building Data & reporting
3

You can extract this data using Data Explorer plugin.

Hope the query below helps you.

1. Lists all topics that are currently assigned to a group
SELECT 
    g.name group_name,
    a.topic_id,
    a.assigned_by_user_id,
    a.created_at
FROM assignments a
INNER JOIN groups g ON g.id = a.assigned_to_id
WHERE assigned_to_type = 'Group'
ORDER BY g.name, created_at DESC
2. Lists the history of assigning topics to groups
SELECT 
    pcf.value AS group,
    p.topic_id,
    p.user_id AS "assigned_by_user_id",
    pcf.created_at::date
FROM posts p
INNER JOIN post_custom_fields pcf ON pcf.post_id = p.id
WHERE action_code = 'assigned_group'
    AND pcf.name = 'action_code_who'
ORDER BY pcf.value, pcf.created_at DESC